UNITED STATES DEPARTMENT OF THE INTERIOR HAROU> L. ICKBS, Secretary GELOGICAL SURVEY W. E. WRATHEB, Director

Water-Supply Papa-1009 SURFACE WATER SUPPLY of the UNITED STATES 1944 PART 9 COLORADO RIVER BASIN

ARIZONA, COLORADO, NEW MEXICO UTAH, AND WYOMING fe£ f and other agencies

UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1945

For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C. Price 55 cents (paper cover) '' CONTENTS

Page Scope of work...... v...... 1 Definition of terms ...... t ...... 1 Explanation of data...... 2 Time basis...... 5 Accuracy of field data and computed results...... 5 Publications...... 5 Records of discharge collected by agencies other than the Geological Survey...... 11 Cooperation...... ll Division of work...... '...... 12 Gaging-station records...... 13 Colorado River Basin...... 13 Colorado River main stem...... 13 Colorado River near Grand Lake, Colo...... 13 Colorado River near Granby, Colo...... 14 Colorado River at Hot Sulphur Springs, Colo...... 15 Colorado River near Dotsero, Colo...... 16 Colorado River at Glenwood Springs, Colo...... 17 Colorado River near Cameo, Colo...... 18. Colorado River near Cisco, Utah...... 19 Colorado River at Lees Ferry, Ariz...... 20 Colorado River near Grand Canyon, Ariz...... 21 Lake Mead at Boulder Dam, Ariz.-Nev...... 22 Colorado River below Boulder Dam, Ariz.-Nev...... 23 Colorado River at Needles, Calif...... 24 Colorado River near Topock, Ariz...... 25 Havasu Lake near Parker Dam, Ariz.-Calif...... 27 Colorado River below Parker Dam, Ariz.-Calif...... 29 Diversions between Parker Dam and Imperial Dam...... 30 Diversion for Colorado Indian Reservation near Parker, Ariz...... 30 Palo Verde Canal near Blythe, Calif...... 30 Colorado River at Imperial Dam, Ariz.-Calif...... 31 Colorado River at Yuma, Ariz...... '...... 32 Colorado River at Rockwood gate, Calif...... 33 Diversions and return flows at and below Imperial Dam...... 34 Gila Gravity Main Canal at Imperial Dam, Ariz.-Calif...... 34 All-American Canal near Imperial Dam, Ariz.-Calif...... 35 Ail-American Canal above Pilot Knob wasteway, Calif...... 36 Yuma Main Canal at s Lphon-drop power plant, near Yuma, Ariz...... 37 Yuma Main Canal below Colorado River siphon, at Yuma, Ariz...... 38 Yuma Main Canal wasteway at Yuma, Ariz...... '...... 39 Pilot Knob wasteway near Pilot Knob, Calif...... 40 Diversions at Laguna Dam, Ariz.-Calif...... 41 Alamo Canal at Andrade, Calif...... 42 Return surface flows from Yuma project, Ariz.-Calif...... 43 Tributaries above Gunntson River...... ;...... ,...... 45 Arapaho Creek below Monarch Lake, Colo...... 45 Willow Creek near Granby, Colo...... 46 Fraser River near Winter Park, Colo...... 47 Fraser River at Granby, Colo...... 48 Vasquez Creek near Winter Park, Colo...... 49 St. Louis Creek near Fraser, Colo...... 50 Ranch Creek near Fra&er, Colo...... 51 Ranch Creek near Tabernash, Colo...... 52 Meadow Creek near Tabernash, Colo...... 53 Strawberry Creek near Granby, Colo...... 54 Williams River near Leal, Colo...... 5s Williams River near Parshall, Colo...... 56 Keyser Creek near Leal, Colo...... 57 Troublesome Creek near Troublesome, Colo...... 58 Blue River at Dlllon, Colo...... 59 Blue River above Green Mountain Reservoir, Colo...... 60 Green Mountain Reservoir near Kremmling, Colo...... 60 Blue River below Green Mountain Reservoir, Colo...... 61 Snake River near Montezuma, Colo...... 62 Snake River at Dillon, Colp...... 63 Tenmlle Creek at Frisco, Colo...... 64 iTenmile Creek at Dillon, Colo...... 65 FStraight Creek near Dillon, Colo...... 66 Willow Creek near Dillon, Colo...... 67 Rock Creek near Dillon, Colo...... 68 Boulder Creek near Dlllon, Colo...... 69 Slate Creek near Dillon, Colo...... 70 Black Creek below Black Lake, near Dillon, Colo...... 71 Black Creek above Green Mountain Reservoir, Colo...... 72 Otter Creek above Green Mountain Reservoir, Colo...... 72 Cataract Creek above Green Mountain Reservoir, Colo...... 73 Elliot Creek feeder canal to Green Mountain Reservoir, Colo...... 73 Piney River near State Bridge, Colo...... >...... 74 Eagle Rive r at Redcllff, Colo...... 75 Turkey Creek at Redcliff, Colo...... 75 Homes take Creek, near Redcll f f, Colo...... 76 Gore Creek near Minturn, Colo...... 76 Roaring Fork at Aspen, Colo...... 77 Roaring Fork at Glenwood- Springs, Colo...... 78 Crystal River near Redstone, Colo...... 79 Fourmlle Creek near Carbondale, Colo...... 80 III IV CONTENTS

Gaging-station records Continued. Colorado River Basin Continued. Tributaries above Gunnison River Continued. - Page West Divide Creek below Willow Creek, near Raven, Colo...... 81 Plateau creek near Collbran, Colo...... - 82 Plateau Creek near Cameo, Colo...... 83 Buzzard Creek near Collbran, Colo...... 84 Big Creek near Collbran, Colo...... 85 Mesa Creek near Mesa, Colo...... 86 Gunnison River Basin...... 87 Taylor Park Reservoir at Taylor Park, Colo...... 87 Taylor River below Taylor Park Reservoir, Colo...... 88 Taylor River at Almont, Colo...... 89 Gunnison River at lola, Colo...... 90 Gunnison River below Gunnison Tunnel, Colo...... 91 Gunnison River near Grand Junction, Colo...... 92 East River near Crested Butte, Colo...... 93 East River at Almont, Colo...... 94 Slate River near Crested Butte, Colo...... 95 Coal Creek near Crested Butte, Colo...... 96 Cement Creek near Crested Butte, Colo...... 97 Ohio Creek near Baldwin, Colo...... 98 Tomichi Creek at Sargents, Colo...... 99 Tomlchi Creek at Gunnison, Colo...... 100 Quartz Creek near Ohio, Colo...... 101 Cochetopa Creek near Parlin, Colo...... 102 Cebolla Cre"ek at Powderhorn, Colo...... 103 Lake Fork at Gateview, Colo...... 104 Clmarron Creek below Squaw Creek, at Cimarron, Colo...... 105 Smith Fork near Crawford, Colo...... 106 East Muddy Creek near Bardine, Colo...... ' 107 North Fork Gunnison River near Somerset, Colo...... 108 Minnesota Creek near Paonia, Colo...... 109 Leroux Creek near Cedaredge, Colo...... 110 Surface Creek near Cedaredge, Colo...... t ...... Ill Surface Creek at Cedaredge, Colo...... 112 Surface Creek at Eckert, Colo...... 113 Ward Creek near Cedaredge, Colo...... 116 Klser Creek near Cedaredge, Colo...... 117 Cottonwood Creek near Cedaredge, Colo...... 118 Youngs Creek near Ced'aredg'e, Colo...... 119 Uncompahgre River at Colona, Colo...... '...... 120, Uncompahgre River at Delta, Colo...... 121 Roubideau Creek at mouth, near Delta, Colo...... 122 Kahnah Creek near Whitewater, Colo...... 123 Dolores River Basin...... 124 Dolores River at Dolores, Colo...... 124 Dolores River near McPhee, Colo...... 125 Dolores River at Gateway, Colo...... 126 West Fork Dolores River near stoner, Colo...... 127 San Miguel River near Placerville, Colo...... 128 San Miguel River at Naturi ta, Colo...... 129 Fall Creek near Kail Creek, Colo...... 130 Beaver Creek near Norwood, Colo...... 131 Cottonwood Creek near Nucla, Colo...... 132 Naturita Creek near Norwood, Colo...... 133 Green River Basin...... 136 Green River at Warren Bridge, near Daniel, Wyo...... 136 Green River near Linwood, Utah...... 137 Green River at Green River, Utah...... 138 Beaver Creek near Daniel, Wyo...... 139 Horse Creek near Daniel, Wyo...... 140 Cottonwood Creek near Dani-el, Wyo...... 141 New Fork River below New Fork Lake, near Cora, Wyo...... 142 New Fork River near Pinedale, Wyo...... 143 New Fork River near Boulder, Wyo...... 144 East Fork near Big Sandy, Wyo...... 145 Silver Creek near Big Sandy, Wyo...... 146 Pine Creek at Pinedale, Wyo...... 147 Pole creek below Little Half Moon Lake, near Pinedale, Wyo...... 148 . Fall Creek near Pinedale, Wyo...... '...... 149 Boulder Creek below Boulder Lake, near Boulder, Wyo...... 150 North Piney Creek near Mason, Wyo...... 151 Middle Piney Creek below South Fork, near Big Plney, Wyo.....:...... 152 Labarge Creek near Viola, Wyo...... 153T Fontenelle Creek near Fontenelle, Wyo...... 154 Big Sandy Creek at Leckie Ranch, near Big Sandy, Wyo...... 155 Little Sandy Creek near Elkhorn, Wyo...... 156 Blacks Fork near Millburne, Wyo...... 157 Blacks Fork near Urie, Wyo...... *...... 158 Blacks Fork near Lyman, Wyo...... 159 East Fork of Smith Fork near Robertson, Wyo...... 160 Smith Fork at Mountainview, Wyop...... 161 West Fork of Smith Fork near Robertson, Wyo...... 162 Henrys Fork near Lonetree, Wyo...... 163 Henrys Fork near Burntfork, Wyo...... 164 Henrys Fork at Linwood, Utah...... 165 Burnt Fork near Burntfork, Wyo...... 166 Sheep Creek near Manila, Utah...... 167 Yampa River near Yampa, Colo...... 168 Yampa River near Oak Creek, Colo...... 169 Yampa River at Steamboat Springs, Colo...... 170 Yampa River near Maybell, Colo...... 171 Elk River at Clark, Colo...... 172 CONTENTS V

Gaging-statlon records Continued. Colorado River Basin Continued. Green River Basin Continued. Page Elkhead Creek near Clark, Oolo...... 173 Elkhead Creek near Hayden, Colo...... 174 Fortification Creek at Cralg, Colo...... 175 East Pork of Williams Fork near Willow creek, Colo...... 176 Little Snake River near Slater, Colo...... -...... ;...... 177 Little Snake River near Dlxon, Wyo...... 178 Little Snake River near Lily, Colo...... 179 Battle Creek near Slater, Colo...... 180 Slater Pork near Slater, Colo...... 181 Savery creek at upper station, near Savery, Wyo...... 182 Savery Creek near Savery, Wyo...... 183 Brush Creek ne^r Vernal, Utah...... 184 Brush Creek near jensen, Utah...... 185 Ashley Creek above springs, near Vernal, Utah...... 186 Ashley Creek near vernal, Utah...... 187 Ashley Creek at Sign of the Maine, near Vernal, Utah...... 188 Ashley Creek Spring near Vernal, Utah...... 189 Dry Fork above sinks, near Dry Fork, Utah...... 190 Dry Fork below springs, near Dry Fork, Utah...... i...... 191 Duchesne River near Tabiona, Utah...... 198 Duchesne River at Duchesne, Utah...... 193 Duchesne River at Myton, Utah... ,\ ...... 194 Duchesne River near Kandlett, Utah...... ^...... 195 Rock Creek near Mountain Home, Utah...... \.... 197 Strawberry River at Duchesne, Utah...... 198 Willow Creek near Soldier Springs, Utah...... 200 Currant Creek near Frultland, Utah...... 201 Lake pork above Moon Lake, near Mountain Home, Utah...... 202 Moon Lake Reservoir near Mountain Home, Utah...... 204 Lake Fork below Moon Lake, near Mountain Home, Utah...... 205 Lake Fork near Upalco, Utah...... 4 ...... 206 Yellowstone Creek near Mountain Home, Utah...... 208 Ulnta River near Neola, Utah...... 209 Uinta River at Fort Duchesne, Utah...... 210 Whiterocks River near Whlterocks, Utah...... 212 Deep Creek near Lapoint, Utah...... 213 white River near Meeker, Colo...... 214 white River near Watson, Utah...... i...... 215 . South Fork White River near Buford, Colo...... 216 Price River above Scofleld Reservoir, near Scofield, Utah...... 217 Scofield Reservoir near Scofield, Utah...... 218 Price River near Scofield, Utah...... 219 Price River1 near Heiner, Utah...... 220 Gooseberry Creek near Scofield, Utah...... 221 White River near Soldier Summit, Utah...... 222 North Fork White River near Soldier Summit, Utah...... 223 Huntlngton Creek near Huntington, Utah...... 224 Boulger Creek near Falrvlew, Utah...... 225 Cottonwood Creek near Orangeville, Utah...... 2S6 Dirty Devil River Basin...... 227 Fremont River below Fish Lake, near Fremont, Utah...... 227 Fremont River near Blcknell, Utah...... 228 San Juan River Basin...... "...... 229 San Juan River near Pagosa Springs, Colo...... 229 San Juan River at Pagosa Springs, Colo...... 230 San juan River at Rosa, N. Mex...... 4 ...... 231 San Juan River near Blanco, N. Mex...... 232 San Juan River >at Farmington, N. Mex...... 233 San Juan River at Ship Rock, N. Mex...'...... -...... 234 San Juan River near Bluff, Utah...... 235 West Fork San Juan River above Borns Lake, near Pagosa Springs, Colo...... 236 West Fork San Juan River near Pagosa Springs, Colo...... 237 Turkey Creek near Pagosa Springs, Colo...... 238 Rlto Blanco near Pagosa Springs, Colo...... 239 Navajo River at Banded Peak Ranch, near Chromo, Colo...... 240 Navajo River at Edith, Colo...... ( ...... 241 Little Navajo River at Chromo, Colo...... A...... 242 Pledra River near Piedra, Colo...... \...... 243 Valleclto Reservoir near Bayfield, Colo...... 244 Los Plnos River near Bayfield, Colo...... 245 Los Pinos River at Ignacio; Colo...... 246 Anlmas River at Howardsville, Colo...... 247 Anlmas River at Durango, Colo...... 248 Animas River near cedar Hill, N. Mex...... 249 Animas River at Farmington, N. Mex...... 250 Mineral Creek near Silverton, Colo...... 251 Hermosa Creek near Hermosa, Colo...... 252 Llghtner Creek near DtCrango, Colo...... 253 Florida River near Durango, Colo...... 254 La Plata River at Hesperus, Colo...... 255 * La Plata River at Colorado-New Mexico State line...... 256 La Plata River near Farmington, N. Mex...... I...... 257 Cherry Creek near Red Mesa, Colo...... 258 West Kancos River near Mancos, Colo...... 259 East Mancos River near Mancos, Colo...... 260 Kiddle Mancos River near Mancos, Colo...... 261 Parla River Basin...... 262 Parla River at Lees Ferry, Arlz...... 262 Little Colorado River Basin...... 263 Little Colorado River above Lyman Reservoir, near St. Johns, Arlz...... 263 Lyman Reservoir near St. Johns, Arlz...... 264 VI CONTENTS

Gaglng-statlon records Continued. Colorado River Basin Continued. Little Colorado River Basins-Continued. 'Page Little Colorado River below Lyman Reservoir, near St. Johns, Arlz...... 265 Little Colorado River above Zunl River, near Hunt, Ariz...... 266 Little Colorado River near Hunt, Arlz...... 267 Little Colorado River near Woodruff, Arlz...... 268 Little Colorado River at Grand Falls, Arlz...... 269 Silver Creek near Woodruff, Arlz...... 270 Puerco River at Gallup, N. Hex...... 271 Puerco River near Adamana, ArJ.z...... 272 Chevelon Fork near Wlnslow, Ariz...... 273 Clear Creek near Wlnslow, Arlz...... 274 Moenkopi Wash near Tuba, Arlz...... 275 Bright Angel Creek Basin...... v...... 276 Bright Angel Creek near Grand Canyon, Ariz/...... 276 Virgin River Basin...... 277 Virgin River at Virgin, Utah...... 277 Virgin River at Littlefleld, Arlz...... 278 North Fork Virgin River near Springdale, Utah...... 279 Ash Creek near New Harmony, Utah...... 280 Santa Clara Creek near Central, Utah...... 281 Santa Clara Creek above Wlnsor Dam; near Santa Clara, Utah...... 282 Bill Williams River Basin...... 283 Bill Williams River near AlaAo, Arlz...... 283 Bill Williams River at Planet, Ariz...... ;...... 284 Santa Pkrla River near Alamo, Ariz...... 285 Date Creek near Congress, Arlz...... 285 Glla River Basin...... 286 Qlla River near Gila, N. Hex...... 286 Glla River near Cliff, N. Mex...... 287 Gila River near Red Rock, N. Hex...... 288 Glla River below Blue Creek, near Vlrden, N. Hex...... 289 Glla River at New Mexico-Arizona State line, near Vlrden, N. Hex...... 290 Diversions from Gila River in Duncan Valley, N. Hex.-Arlz...... 291 Glla River near Clifton, Arlz...... 292 Gila River near Solomonsville, Arlz...... 293 Diversions from Gila River in Safford Valley, Arlz...... 295 Gila River at Safford, Arlz>...... 296 Olla River and canals across valley section near Thatcher, Arlz...... 297 Oila River and canals across valley section near Glenbar, Arlz...... 298 Glla River and canals across valley section near Fort Thomas, Ariz...... 299 Gila River at Black Point, near Geronimo, Arlz...... 301 Glla River at Calva, Ariz...... 302 Gain or loss In Glla River, Thatcher to Calva, Arlz...... :...... 303 San Carlos Reservoir at Coolidge Dam, Arlz...... 305 Glla River below Coolidge Dam, Arlz...... 306 Gila River at Winkelman, Ariz...... 307 Glla River at Kelvin, Arlz...... 308 Glla River at Ashurst-Hayden Dam, near Florence, Arlz...... 309 Glla River near Laveen, Arlz...... 310 * Glla River below Glllesple Dam, Ariz...... 311 Glla River near Dome, Arlz...... 313 Sunset Canal near Vlrden, N. Hex...... 313 Sunset Canal above New Mexico-Arizona State line, near Vlrden, N. Hex...... 314 Sunset Canal wasteway near Virden, N. Hex...... 315 Moddle Canal near Vlrdeji, N. Hex...... 316 Moddle Canal at New Mexico-Arizona State line, near Vlrden, N. Hex...... 317 Shriver Canal at Virden, N. Hex...... 318 Valley Canal near Vlrden, N. Hex...... 319 San Francisco River near Glenwood, N. Mex...... 320 San Francisco River at Clifton, Arlz...... 321 San Simon Creek near Solomonsville, Ariz...... 322 San Carlos River near Peridot, Ariz...... 323 San Pedro River at Charleston, Arlz...... 324 San Pedro River near Redington, Ariz...... 325 Santa Cruz River near Nogales, Arlz...... 326 Santa Cruz River at Continental, Ariz...... 326 Santa Cruz River at Tucson, Arlz...... 327 Santa Cruz River at Rlllito, Ariz...... 328 Santa Cruz River at Laveen, Arlz...... 329 Sonolta Creek near Patagonia, Ariz...... 330 Tucson Arroya at Vine Avenue, Tucson, Arlz...... 331 Rlllito Creek near Wrightstown, Ariz...... 332 Rlllito Creek near Tucson, Arlz...... '...... 333 Sablno Creek near Tucson, Arlz...... 334 Salt River near Chrysotlle, Ariz...... 335 Salt River near Roosevelt, Ariz...... 336 Reservoir system on Salt River at and below Roosevelt Dam, Arlz...... 337 Salt River below Stewart Mountain Dam, Ariz...... 338 Tonto Creek above Gun Creek, near Roosevelt, Arlz...... 339 Verde River near Camp Verde, Arlz...... 340 Verde River above Bartlett Reservoir, neaf Cave Creek, Arlz...... 341 Bartlett Reservoir at Bartlett Dam, Arlz...... 342 Verde River below Bartlett Dam, Arlz...... 343 Oak Creek near Cornville, Ariz...... 344 Diversions for city of Phoenix from Verde River at McDowell, Arlz...... '. 345 Diversions from Salt River at Granite Reef Dam, Arlz...... 345 Agua Frla River near Mayer, Arlz...... 346 Agua Fria River at Lake Pleasant Dam, Calif...... 347 Lake Pleasant at Lake Pleasant Dam, Arlz...... 548 Hassayampa River near Wagoner, Ariz...... 349 Hassayampa River near Morristown, Ariz...... 350 CONTENTS ' VII

Gaglng-statlon records Continued. Page Sulphur Spring Valley...... 351 Whitewater Bravj Basin...... ,...... '...... 351 Whitewater Draw near Douglas, Arlz...... 351 Miscellaneous discharge measurements...... 352 index...... 355

ILLUSTRATION page Figure 1. Gaglng-statlon structures:A, Colorado River at Lees Ferry, Aria.; B, Bill Williams River at PlanetT Arlz...... 7...... Z SURFACE WATER SUPPLY OF THE COLCRADO RIVER BASIN, 1944

SCOPE: OF WORK

This volume Is one of a series of 14 reports presenting results of measurements of stage and flow made on streams, lates, and reservoirs In the united States during the- water year ending September 30, 1944. The work was begun In 1888 In connection with special studies relating to Irrigation.' Measurements of the flow, of streams and of the stage and contents of lakes and reservoirs have been made at about 10,000 gaging stations In ttie 48 States and also at many In the Territories of Alaska and Hawaii. In July 1944, 5,340 gaging stations, Including those In Hawaii, were being maintained by the Geological Survey and cooperating organizations. Miscellaneous discharge measurements were made during the water year at many other points. In the execution of the work many state and private organizations have cooperated, either by furnishing data or by assisting In collecting data. Cooperation of the first kind is acknowledged In connection with the description of each station affected; cooper­ ation of the second kind Is acknowledged, under the heading "Cooperation," In the intro­ ductory matter that precedes the gaglng-statlon records In each volume. In the present volume, the section on cooperation of the second kind appears on page 11. -

, DEFINITION OF TERMS The units In which stream-flow data are presented In this report and other terms used herein are defined as follows: "Second-feet" Is an abbreviation for "cubic feet per second." A second-foot Is the rate of discharge of a stream whose channel Is 1 square foot In cross-seotlonal area and whose average velocity Is 1 foot per second, "Second-feet per square mile" ; Is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the runoff is dis­ tributed uniformly both as regards time and area. "Runoff in inches" Is the depth to which an area would be covered If all the water draining from It in a given period were uniformly distributed on Its surface. It Is used for comparing runoff with rainfall, whloh Is usually expressed in inches. An "acre-foot" is the quantity of water required to cover an acre to the depth of 1 foot and Is equivalent to 43,560 cubic feet_- The term Is commonly used In connection with storage for Irrigation. Second-foot-day" Is the volume of water represented by a flow of 1 second-foot for 24 hours. It is equivalent to 86,400 cubic feet, 1.983471 acre-feet, or 646,317 gallons and represents a runoff of 0.0372 Inch from 1 square mile. "Stage-discharge relation" Is an abbreviation for the term "relation between gage height and discharge." "Control" is a term used to designate a feature downstream from the gage that determines the stage-discharge relation at the gage. This feature may be a natural section, a reach of the channel, or an artificial structure. 1 2 SUBFACE WATER SUPPLY, 1944, PART 9

"Contents" Is a term applied to ttie volume of water In a reservoir, not Including water In bank storage unless so Indicated.

EXPLANATION OF DATA The base data collected at gaging stations consist of records of stage, meaeurements of discharge, and general Information used to supplement the records of stage and 'discharge measurements In determining the dally flow. The records of stage are obtained either from direct readings on a nonrecording gage or from a water-stage recorder that gives a con­ tinuous record of the fluctuations. Measurements of discharge are made with a current meter by the general methods outlined In standard textbooks on the measurement of river discharge. Typical structures In use at gaging stations are shown In figure 1. Rating tables giving the discharge for any stage are prepared from the discharge meas­ urements. The application of the dally mean gage height to those rating tables gives the dally mean discharge, from which the monthly and the yearly mean discharge are computed. If the stage-discharge relation Is subject to change because of frequent or continual change in the physical features that form the control, the dally mean discharge Is de­ termined by the "shifting-control method," In which correction factors based on Individ­ ual discharge measurements and notes by engineers and observers are used In applying Hie gage heights to the rating tables. At times the stage-discharge relation for a station may be temporarily changed by the presence of aquatic growth or debris on the control. For such times the dally mean discharge Is computed by what is essentially the "shifting- control" method, described above. At some gaging stations the stage-cHscharge relation Is affected by backwater from reservoirs, tributary streams, or other sources, which necessitates the use 6f~the "slope method," In which the slope or fall In a reach of the stream Is a factor In the determi­ nation of discharge. Infprmatlon requisite for determining ttie slope or fall Is obtained by means of an auxiliary gage set at some distance from-the base gage. At some stations the stage-discharge relation Is affected by changing stage, and from them the rate of change of stage Is used as a factor In the determination of discharge. At most gaging stations In the northern part of the United States and at some In the mountainous regions of otter parts the stage-discharge relation Is affected by ice during the winter, which makes It Impossible to compute the discharge In the usual manner. Dis­ charge for periods of Ice effect Is computed on the basis of the gage-height record and occasional winter discharge measurements, consideration being given to the available In­ formation on temperature and precipitation, notes by gage observers and engineers, and comparable records of discharge for stations in the same or nearby basins. For those stations at which the stage-discharge relation Is affected by ice, the days included In the periods of Ice effect either are indicated In the table by symbols referring to a footnote that states this fact or are given in a general note following the table. The I days on which discharge measurements were made during or between periods of ice effect, shortly before the first period, or shortly after the last period are similarly Indicated by a footnote. For most of the gaging stations on streams in the area covered by this report the data presented comprise a description of the station, a table showing the daily discharge of the stream, and a table or monthly and yearly discharge and runoff. Skeleton rating EXPLANATION OF DATA

A. COLORADO RIVER AT LEES FERRY, ARIZ. Note landing tower.

B. BILL WILLIAMS RIVER AT PLANET, ARIZ. FIGUKE 1. GAGING-STATION STRUCTURES. ' 4 SURFACE WATER SUPPLY, 1944, PART 9 tables are published for all stations except those at which the dally discharge for the greater part of the year was determined by the shifting-control method, the slope method, or other special methods. The description of the station gives the type of gage, Its latitude and longitude as determined from the best available maps, and Information In regard to diversions that decrease the flow at the gage, artificial regulation from pondage or storage, and the accuracy of the records. Under "Average discharge" Is given the average discharge for the number of years Indicated. It Is given only for stations for which there are 10 or more complete years of record. Under "Extremes" are given the maximum discharge and gage height; the minimum discharge if there is little or no regulation; the minimum dally discharge if there Is extensive regulation (also the minimum discharge If useful); and the minimum gage height (unless It Is of no importance). Unless otherwise qualified, the maximum discharge corresponds to the crest stage, obtalnsd by use of a water-stage recorder or a nonrecord- ing" gage read at the time of the crest. Likewise the minimum discharge represents the lowest stage, unless otherwise qualified. Selected peak discharges with the times of their occurrence are given, below the table of monthly discharge, for some stations. This supplementary information is generally omitted for a station at which the drainage area of the stream is less tfian 10 or more than 10,000 square miles or at which, on most days, the peak discharge exceeds the mean discharge by less than 10 percent. For stations equipped with water-stage recorders, except those on streams subject to sudden or rapid fluctuation, the table gives the discharge corresponding to the dally mean gage height. For stations subject to such fluctuation the daily mean gage height may not Indicate the true daily mean discharge, which must be obtained by averaging the discharge for parts of the day or by using the discharge integrator, an Instrument for obtaining the dally mean discharge from a continuous gage-height graph and containing as an essential element a curve representing the stage-discharge relation at the station. For stations equipped with nonrecording gages, the table of dally discharge gives the discharge In second-feet corresponding to once-daily readings of the gage or the mean of twice-daily readings. For periods of rapidly changing stage the dally mean discharge Is determined from gage-height graphs based on gage readings made once or twice daily or oftener, as stated in the station description. In the table of monthly discharge the column headed "Second-foot-days" gives the sum for each month of the figures given In the table of daily discharge. The column headed "Maximum" gives the maximum dally discharge, not the momentary discharge when the water surface was at crest stage. Likewise, In the column headed "Minimum" the quantity given is the minimum dally discharge. The' column headed "Mean" gives the average flow In cubic feet per second during the month. . For most gaging stations on lakes and reservoirs the data presented comprise a descrip­ tion of the station and a monthly summary table of etage and contents. For some reservoirs a table showing dally contents Is given. A skeleton table of capacity at given stages Is usually given In the first report In which data for a station are published but Is omitted from succeeding reports. SURFACE WATER SUPPLY, 1944, PART & 5

TIME BASIS At 2 a.m. on February 9, 1942, as an emergency measure, the Nation shifted from standard time to "war time," and clock time In the several zones of the country was moved ahead 1 .hour, or to 3 a.m. Records of daily discharge prior to February 9, 1942, were computed on the basis of standard time. Records subsequent to that date have been computed on the basis of war time. To convert war time to standard time, subtract 1 hour. The state of Arizona, by proclamation of the governor, changed official time from mountain war time to mountain standard time, effective 12:01 a. m. January 1, 1944. For stations In Arizona, records prior to January 1, 1944, were computed on the basis of mountain war time, and those subsequent to that date were computed on the basis of mountain standard time.

ACCURACY OF FIELD DATA AND COMPUTED RESULTS The accuracy of stream-flow data depends primarily on (1) the permanency of the stage- discharge relation or, if the control Is unstable, tiie frequency of discharge measurements and (2) the accuracy of observations of stage, measurements of flow, and Interpretation of records. The station description gives a statement In regard to the general accuracy of the records. "Excellent" indicates that, In general, the error in the daily records is believed to be less than 5 percent; "good," less than 10 percent; "fair," less than 15 per­ cent; and "poor," probably more than 15 percent. The records, of monthly and yearly mean discharge and runoff are, In general, more accurate than the dally records. Yield at some stations as indicated by monthly means may vary widely from natural yield, owing to diversion, .consumption, regulation by storage, Increase or decrease In eTaporation due to artificial causes, or other factors. For such stations figures of "second-feet per square mile" and "runoff in Inches" are not published unless storage or diversion records are Included Indicating the extent of the regulation or diversion or unless satisfactory adjustments can be made for changes In contents or reservoirs or for other changes incident to use and control. Evaporation from a reservoir Is not included In the adjustments for changes in reservoir contents, unless Its Inclusion is indicated. Figures of second-feet per square mile and runoff In inches are also omitted If the drainage area Includes large noncontrtbuting areas or If the average annual rainfall over the drainage area Is less than 20 Inches. Kany gaging stations on streams in the irrigated areas of the United States are situ­ ated above most of the diversions from those streams, and therefore the discharge recorded does not show the water supply available for further development, as prior appropriations, below the station must first be satisfied. The table of monthly discharge presents In summary the distribution of the flow past the station. The table of dally discharge affords opportunity for more detailed studies of the variation in flow. As further observations In each succeeding year may be expected to ttirow new light on data previously published, it should be borne in mind that such data are subject to revision in succeeding water-supply papers.

PUBLICATIONS The results of stream-flow measurements are now published annually In 4 parts, each part covering an area whose boundaries coincide with natural drainage fea res as Indicated below: Part 1. North Atlantic slope basins (St. John River to York River). 2. South Atlantic and eastern Gulf of Mexico basins (James River to Mississippi River). 3. Ohio River Basin. 6 SURFACE WATER SUPPLY, 1944, PART 9

Part 4. St. Lawrence River Basin. 5. Hudson Bay and upper Mississippi River Basins. 6. Missouri River Basin. 7. Lower Mississippi River Basin. 8. Western Gulf of Mexico basins. 9. Colorado River Basin. 10. The Great Basin. 11. Pacific slope basins In California. 12. Pacific slope basins in Washington and upper Columbia River Basin. 13. Snake River Basin. 14. Pacific slope basins in Oregon and lower Columbia River Basin. Water-supply papers and other publications of the Geological Survey containing data on the water resources of the United States may be obtained or consulted as explained below. 1. Copies may be purchased at nominal cost from the Superintendent of Documents, Government Printing Office, Washington, D. C., who will, on application, furnish lists giving prices. 2. Sets of the reports may be consulted in the libraries of the principal cities In the United States. 3. Sets are available for consultation In the offices of the water-resourcee branch of the Geological Survey as follows: East of the Mississippi River: Albany, N. Y., 528 Federal Building. ASheville, H. C.. 220 Post Office Bulldine. Atlanta, Ga., 410 Grand Theater Building. Augusta, Maine, Statehouse. Baton Rouge, La., 124 Geology Building, Louisiana State University. Boston, Mass., 939 Post Office Building. Charleston, W. Va., 408 Union Building. Charlottesvllie, Va., House G, Dawson Row, University of Virginia. Chattanooga, Term., 442 Post Office Building. College Park, Md., 105 Engineering Building, University of Maryland. Columbia, 8. C., 207 Creason Building. Columbus, Ohio, 404 Engineering Experiment Station, Ohio State UDlversity. Harrlsburg, Pa., 490 Education Building. Hartford, Conn., 203 Federal Building. Indianapolis, Ind., 205 Underwriters Building. Jackson, Miss., 208 Mlllsaps Building. Knoxvllle, Term., 337 Post Office Building. Louisville, Ky., 531 Federal Building. Madison, Wis., 666 State Office Building. Montgomery, Ala., 507 Post Office Building. Morgantown, W. Va., 406 Mineral Industries Building. New Philadelphia, Ohio, Muskingum Watershed Conservancy District Building. Ocala, Fla, 304 Post Office Building. Pittsburgh, Pa., 515 Plaza Building. Raleigh, N. C., 242 Education Building. St. Paul, Mlnn., 1427 New Post Office Building. Trenton, N. J., 228 Federal Building. Urbana, 111., 14 Post Office Annex, Elm Street. Washington, D. C., Federal Works Agency Building. Wllllamsburg, Ky., Kentucky Highway Building. west of the Mississippi River: Albuquerque, N. Hex., 723 North second Street. Austin, Tex., 302 west Fifteenth street. Bismarck, N. Dak., 1301 State Capitol. Boise, Idaho, 429 Federal Building. Denver, Colo., 310 Denham Building. Fort Smith, Ark., 6 Post Office Building. Helena, Mont., 408 Federal Building. Honolulu, Hawaii, 225 Federal Building. Idaho Falls, Idaho, 204 Federal Building. Iowa City, Iowa, 508 Hydraulic Laboratory, University of Iowa. Lincoln, Nebr., 349 Statehouse. Los Angeles, Calif. 429-F United States Post Office and Courthouse. Oklahoma City, Okla., 535 State Capitol. Pierre, S. Dak., City Hall. Portland, Oreg., 606 Post Office Building. Rolla, Mo., Missouri Geological Survey Building, Missouri School of Mines and Metallurgy. St. Louis, Mo., 1002 New Federal Building. Salt Lake City, Utah, 303 Federal Building. San Francisco, Calif., 625 Market street Building. Santa Fe, N. Mex., 204 United States Courthouse. Tacoma, Wash., 207 Federal Building. Topeka, Kans., 305 Federal Building. Tucson, Arlz., 210 Post Office Building. - i A list of the Geological Survey publications may be obtained by applying to the Director, Geological Survey, Washington, D. C. PUBLICATIONS " . 7

Early records of the flow of streams in the United States are published in the reports listed below. In many of these reports records for years earlier than those Indicated have been included for some streams.

Stream-flow data for the years 1884-1901, la reports of the Oeologioal Survey (t s Annual Report; B = Bulletin; W = Water-Supply Paper)

Report Character of data Tear 10th A, pt. 2 Descriptive information only. llth A, pt. 2 18S4 to September 1890. 12th A, pt . 2 1884 to June 30, 1891. 13th A, pt. 3 1884-92 . 14th A, pt . Z 18S8-93 . 1893-94. 16th A, pt. 2 Descriptive information only. Descriptions, measurements, gage heights, ratings, and 1895. monthly discharge. W 11...... 1896. 18th A, pt. 4 Descriptions, measurements, ratings, and monthly discharge... 1895-96. W 15...... Descriptions, measurements, and gage heights of streams 1897. east of the Mississiopi River, and Missouri River and tributaries above Kansas River. Descriptions, measurements, and gage heights of streams west 1697. of the Mississippi River, except Missouri River and tribu­ taries above Kansas River. 19th A, pt . 4 Descriptions, measurements, ratings, and monthly discharge. 1S97. Measurements, ratings, and gage heights of streams east of 1898. the Mississippi River, and Missouri River and tributaries. Measurements, ratings, and gage heights of streams west of 1898. the Mississippi River, except Missouri River and tribu­ taries . 20th A, pt. 4 1898. W 35 to 39. 1899 . 21st A, pt. 4 1899. W 47 to 52. 1900. 22d A, pt. 4. 1900. W 65, 66... 1901. 1901.

Papers on surface water supply containing records from 1899 to date, grouped by years and drainage basins, are listed by number on page 8. Tne data for any particular gaging station will, in general, be found in the reports covering the years during which the station was maintained. For example, the data for 1910 to 1920 for any station in the area covered by part 3 are published in Water-Supply Papers 283, 303,5*323, 353, 403, 433, 453, 473, and 503, which contain records for the Ohio River Basin for those years. The records at most of the stations discussed In these reports extend over a series of years. Miscellaneous measurements at many points other than regular gaging stations have been made each year and are published under "Miscellaneous discharge measurements" at the end of each report, the streams and points of measurement listed appearing lit the same relative order as the streams and gaging stations In the body of the report. An index of ths records obtained prior to 1904nas been published in Water-Supply Paper 119. Each of the reports on surface water supply for the year 1939, Issued as Water-supply Papers 871 to 884 (see table on p. 8), contains, for the area covered by that report, a summary of yearly discharge at gaging stations at which 10 or more complete years of record have been collected. These summaries are available also as separate reprints. Sumbers of water-supply papers containing results of strean measurements, 1899-1944 (For basins included aee pp- 5-6). Year 1 ? 3 4 5 6 7 8 9 10 11 12 13 14 1899 a 35 036, 36 36 36 36 036, 37 37 37 437, 38 38, »39 38, 139 38 38 98 1900 g 47. b.48 48 48, 149 49 49 49, J50 50 SO 50 51 51 51 51 51 1801. 65, 75 65, 75 65, 75 68, 75 k6S, 66, 75 66, 76 k6S, 66, 75 66, 75 66, 75 66, 75 " B 66, 75 66, 75 66, 75 1902. 82 bes, as 83 m82, 83 k83. 86 84 k83, 84 84 85 85 85 86 85 97 jg-jB . j^s,,M^mQ ff MS. 99 -if- Jff- 100 » * m 1905.' 0184, plSS, 4186 ax«o» Us* M Icl28, 130 130, rlSl k!88, 131 loe loo 133, sl34 xoo 1O0 0165, p!66, ey.67 4167, 168 169 170 171 172 k!69, 173 174 175, U77 176, 8177 177 * 178 178 u!77, 178 1900. 0801, p202, 4803 4803,804 205 206 207 208 k80S, 209 210 211, t213 212, 8213 213 214 214 214 1907-6 841 242 243 244 245 246 247 248 249 250, S2S1 251 252 252 252 261 862 863 264 267 268 270 . s271 HI- 9*79 272 ivio. 281 ass 287 288 292 1911. 301 302 303 304 305 306 307 308 309 310 311 312 312 312 1912. 381 322 323 324 325 326 327 328 329 330 331 332-A 332-B 332-C 1919. 3S1 352 353 354 355 356 357 358 359 360 361 362-A 362-B 362-0 1914. 381 382 387 388 389 S90 391 S93 394 1916. 401 402 4

Reports have been published that are compilations- of records for various areas, usually a single State or drainage basin. These reports contain records previously published (some of which have been revised), as well as some records not contained in the annual series of water-supply papers. The following table gives the numbers and titles of these reports, arranged alphabetically, some by States and some by drainage basine. Reports containing compilations of records of discharge by states and drainage basins Water-Supply Report Period Paper STATE Alabama, Water powers of, with an appendix on stream measurements In 1895-1903 Mississippi. California, Water resources of, part 1, Stream measurements In Sacra- 1887-1912 mento Elver Basin. California, Water resources-of, part 2, Stream measurements In San 1878-1912 Joaquln River Basin. California, Water resources of, part 3, Stream measurements In the Great 1891-1912 300 Basin and Pacific Coast river basins. California, southern, Surface water supply of Pacific slope of...... 1890-1918 447 California, Surface water supply of Sacramento River Basin...... 1895-1927 597-E California, Surface water supply of San Joaquln River Basin...... 1895-1927 636-D California, southern, Surface water supply of Pacific slope basins in... 1S94-1927 636-B California, Surface water supply of minor San'Francisco Bay, northern 1895-1927 6S7-A Pacific, and Qreat basins In. Colorado, Water resources of...... 1884-1900 74 Georgia, Water resources of...... 1895-1905 197 Massachusetts, Surface waters of...... 1845-1915 416 Nebraska, Surface water supply of...... 1894-1906 230 Oregon, Surface water supply of...... 1878-1910 370 Texas, Summary of'records of surface waters of...... 1898-1937 850 Vermont, Surface waters of...... 1875-1916 424 Washington, Summary of hydrometrlo data In...... 1S78-1919 492 Washington, Summary of records of surface waters of...... 1919-35 870 Wisconsin, northern. Water power of...... 1895-1905 156 Wyoming, Surface waters of, and their utilization...... 1894-1921 469 DRAINAGE BASIN Colorado River (Arlz., Colo., H. Hex., Utah, Wyo.) and its utilisation.. 1888-1914 395 Colorado River, upper (Colo., tftah), and Its utilisation...... 1S97-1927 617 Colorado River Basin (Arlz., Calif., Colo., Utah, Wyo.), Surface waters 1891-1938 918 at base stations in. Columbia River Basin, upper (Mont., Idaho), Surface waters of...... 1898-1938 916 Oreat Salt lake Basin, Water powers of...... : ...... 1889-1920 517 Qreen River {Colo., tftah, Wyo.) and Its utilization...... 1894-1926 618 Kennebec River Basin (Maine), Water resources of...... 1890-1906 19S Kllk River. See St. Mary and Milk Rivers...... Missouri and St. Hary River Basins (Mont.), Surface waters of...... 1881-1938 917 New-Kanawha River Basin (M. C., Va., W. Va.), Surface water supply of... 1S95-1920 536 Penobscot River Basin (Maine), Water resources of...... 1904-9 279 Potomae River Basin (D. C-, H4., W. Va.)...... 1895-1906 192 Rio Qrande Basin (Colo., N. Hex., Tex.), Water resources of...... 1888-1913 358 St. Hary and Milk Rivers .{Mont., Canada), Water supply of...... 1898-1917 491 St. Hary River. See St. Mary and Milk Rivers; Missouri and St. Hary River Basin. Suaquehaima River Basin (Pa., Hd.), Hydrography of...... 1890-1904 109

Records of discharge have been published also in State reports. Some of these are not contained in the publications of the Geological Survey or are revisions of records previously published in its water-supply papers. The following table contains a. list of these reports. State reports containing compilations of records of discharge Report Isaued by Alabama..... 1895-1915 Bull. 17, Water powers of Alabama...... Geological Surrey of Alabama. Arkansas.... 1857-192S Stream-gaging Rept. 1...... Arkansas Geological Surrey. Colorado.... 1881-1935 Water resources of Colorado, Appendix 2, State Planning Commission, Data on stream-gaging stations of Water Conservation Board, Colorado.1 State engineer* Water resources of Colorado, Appendix 3, Do. vols. 1 and 2, Stream-flow data of Colorado. Connecticut. 1900-1927 Bull. 44, Water resources of Connecticut.- State Geological and natural History Survey. Do...... 1912-33 5th biennial report^...... State Water Commission. Georgia..... 1895-1906 Bull. 16, Water powers of Georgia...... Geological Survey of Georgia. Do...... 1907-19 Bull. 38, Water powers of Georgia...... Do. Illinois.... 1908-11 Water resources of Illinois...... Rivers and lakes Commission. Do...... 1900-1934 Stream-flow data of Illinois...... Division of Waterways. Indiana"*.... 1923-27 Pub. 72, Surface water supply of Indiana.. Department of Conservation. Do...... 1927-30 Pub. 112, Surface water supply of Indiana. Do. Iowa...... 1873-1932 Stream-flow records of Iowa...... State Planning Board. Do...... 1S73-1940 Water-Supply Bull. 1, Summaries of yearly Iowa Geological Survey. and flood flow relating to Iowa streams. Do. 1941-42 Water-Supply Bull. 2, Surface water resources of Iowa. 1 Contains records of yearly discharge only. 2 Contains records of monthly' discharge In second-feet per square mile. 670650 O- 45- S 10 SUKFACE WATER SUPPLY, 1944, PART 9

State reports containing compilations nf records of discharge Continued State Period Report Issued by 1895-1919 Kansas Water Commission. 1919^24 Do. 1924-28 Report of Division of Water Resources..... State Board of Agriculture. 1928-35 Do. Do. Do. Kentucky. .... 1910-20 Kentucky Geological Survey. Louisiana. . . . 1903-38 Geol. Bull. 16, Surface water supply of Department of Conservation. Louisiana. 1887-1920 Maine Water Power Commission. Maryland. .... 1929-37 Plow data and draft storage curves for State Planning Commission and major streams in Maryland. Water Resources Commission. 1892-1943 Bull. 1, Summary of records of surface Department of Geology, Mines, waters of Maryland and the Potomao and Water Resources. River Basin. Minnesota. . . . 1909-12 Water-resources investigation of Minne­ State Drainage Commission. sota. Missouri. .... 1857-1926 Vol. 20, 2d series, Water resources of Missouri Bureau of Geology and Missouri. Mines. 1927-39 Vol. 26, 2d series, Surface waters of Missouri Geological Survey and Missouri. Water Resources. 1889-1911 Office of the State engineer. 1881-1938 Special Rept. 10, vols. 1-4, Water re­ Montana Agricultural Experi­ sources of Montana. ment Station. Nebraska. .... 1894-1914 Bureau of Water Power, Irri­ gation, and Drainage. 1914-28 Do. New Hampshire 1889-1922 Annual and statistical report, vol. IS,2 ... Puolic Service Commission. New Jersey>* 1891-1928 Bull. 33, Surface water supply of New Department of Conservation and Jersey. Development . 1928-34 Special Rept. 5, Surface water supply of State Water Policy Commission. New Jersey. 1934-40 Special Rept. 9, Surface water supply of Do. New Jersey. New Mexico... 1888-1925 Surface water supply of New Mexico ...... Office of the State Engineer. North Caro­ 1889-1923 Bull. 34, Discharge records of North Department of Conservation and lina. Carolina streams. 5 Development . 1889-1936 Bull. 39, Discharge records of North Do. Carolina streams. 4 North Dakota- 1919-21 Report to Governor of North Dakota on State chief engineer. flood control. 1882-1938 State Planning Board. 1882-1944 State Water Conservation ' Commission- 1898-1921 Engineering Experiment Station, Ohio State University- 1902-39 Bull. 200, Compilation of stream-flow Department of Agriculture1, records of Ohio. Division of Conservation and Natural Resources. 1898-1939 Bull. Ill, Ohio stream-drainage areas and Engineering Experiment Station, flow-duration tables. Ohio State Ttaiversity. 1878-1914 Bull. 4, Water resources of the State of Office of the State Engineer. Oregon. 1914-24 Do. Oregon. 1924-30 Bull. 8, Water resources of the State of Do. Oregon. 1930-36 Do. Oregon. Pennsylvania . 1890-1911 Report of the Water Supply Commission of Water Supply Commission of Pennsylvania. Pennsylvania . 1928-32 Department of Forests and Waters. Rhode Island. 1929-41 Department of Public Works. Tennessee .... 1874-1924 Bull. 34, Water resources of Tennessee.... Department of Education. 1920-30 Bull. 40, Surface waters of Tennessee"3 .... Do. 1889-1905 Office of the State Engineer. 1906-10 Do. 1911-16 Do. 1895-1927 Bull. 31, Water resources of Virginia ..... Virginia" Geological Survey. 1927-42 Bull. 4, Surface water supply of Virginia Virginia Conservation Com­ (Potomao, Rappahannock, and York River mission. Basins). 1927-42 Bull. 5, Surface water supply of Virginia Do. (James River Basin). 1927-42 Bull. 6, Surface water supply of Virginia Do. (Roanoke and Chowan River Basins). 1927-42 Bull. 7, Surface water supply of Virginia Do. (Hew, Tennessee, and Big Sandy River Basins) . Washington. .. 1878-1933 Bull. 5, Monthly and yearly summaries of Department of Conservation and hydrometrio data. Development. Wisconsin... . 1888-1914 1st report of Railroad Commission of Wis­ Railroad Commission of Wis­ consin to Legislature on water powers. consin. 1914-23 2d report of Railroad Commission of Wis­ Do. consin to Legislature on water powers. 2 Contains records of monthly discharge in second-feet per square mile. 3 Contains records of weekly discharge. 4 Contains records of maximum and minimum daily, weekly, and monthly discharge and yearly mean discharge. Note.- In addition to the records contained in the reports listed above, the following States have Issued annual or biennial reports in which are contained records of discharge: California, Colorado, Connecticut, Idaho, Indiana, Maine, Missouri, Montana, Nebraska, Nevada, New Mexico, Hew York (also New York City Board of Water Supply and city of Rochester), North Dakota, Oregon, Pennsylvania, Rhode Island, Washington, and Wyoming. RECORDS OF DISCHARGE COLLECTED BY AGENCIES OTHER THAN THE GEOLOGICAL SURVEY 11

The reports listed In the foregoing tables contain the customary records of discharge collected during the systematic operation of gaging stations. Detailed Information on the stage and discharge of many streams during major floods has been Included In special reports on these floods published by the Geological Survey. The more recent of these special reports also contain other pertinent hydrologlc Information and analyses and compilations of data relating to earlier noteworthy floods. The following list gives the numbers and titles of these reports:

Water-Supply , paper Title 88 The Passalc flood of 1902. 92 The Passalc flood of 1903. 96 Destructive floods In the United states in 1903. 147 Destructive floods in the United states in 1904. ' 162 Destructive floods In the United states In 1905." 334 The Ohio Valley flood of March-April 1913. 426 Southern California floods of January 1916. 487 The Arkansas River flood of June 3-5, 1921. 488 ' The floods In central Texas in September 1921. 520-G Some floods In ttie Rocky Mountain region. 636-C The New England flood of November 1927. 771 Floods In the United states, magnitude and frequency. 773-E The New York State flood of July 1935. ' 796-B Flood on Republican and Kansas Rivers, May and June 1935. 796-C \Flood In La Canada Valley, Calif., January I, 1934. 796-G Major Texas floods of 1935. 798 The floods of March 1936, part 1, New England rivers. 799 The floods of March 1936, part 2, Hudson River to susquehanna River region. 800 The floods of March 1936, part 3, Potomac, James, and upper Ohio Rivers. 816 Major Texas floods of 1936. 836-A Stages and flood discharges of the Connecticut River at Hartford, conn. 838 Floods of Ohio and Mississippi Rivers, January-February 1937. 842 Floods In Canadian and Pecos River Basins of New Mexico, May and June 1937. 843 Floods of December 1937 In northern California. 844 Floods of March 1938 in southern California. 847 Maximum discharges at stream-measurement stations through September 1938. 867 Hurricane floods of September 1938. 869 Flood of August 1935 In Muskingum River Basin, "Ohio. 914 Texas floods of 1938 and 1939. 967-A Floods of September 1939 In Colorado River Basin below Boulder Dam. 967-B Flood of July 5, 1939, In eastern Kentucky.

RECORDS OF DISCHARGE COLLECTED BY AGENCIES OTHER THAN THE GEOLOGICAL SURVEY The Western Colorado Power Co. continued, during the water year October 1943 to Sep­ tember 1944, to collect records of dally discharge for Cascade Creek near Tacoma, Colo., which now .cover the years 1915-44. The records for the years 1934-40 are published In the surface water-supply papers of the Geological Survey covering the Colorado River Basin for those years, and the records for ttie entire period are on file at the Office of the state Engineer of Colorado.

COOPERATION The work in the several States was done under cooperative agreements with the organi­ zations listed below: , Arizona: State Land Department, 0. C. Williams, Commissioner; Salt River Valley Water Users' Assoclatio'n; Metropolitan Water District of Southern California (for certain stations on Colorado River below Boulder Dam and on Vl111lams River); San Carlos irrigation and Drainage District; and Maricopa County Municipal Water Conser­ vation District No. 1. Colorado: Office of the State Engineer, M. C. Hlnderllder, and the State water conservation Board, C. H. Stone, director. New Mexico: Office of the State Engineer, T. M. McClure, and the New Mexico Inter­ state-Stream Commission, T. M. McClure, secretary. Utah: Office of the State Engineer, E. H. Watson. 12 SURFACE WATER SUPPLY, 1944, PART 9

Wyoming: Office of the State Engineer, L. c. Bishop, and the State Planning and Water Conservation Board, Gov. L. C. Hunt, president. Financial assistance was furnished by the Corps of Engineers, u. S. Army, for the opera­ tion of 10 gaging stations in Arizona and 1 in New Mexico and for the obtaining of additional hlgh-^water discharge measurements at gaging stations in Utah. Financial assistance was also furnished by the Bureau of Reclamation, united States De­ partment of the interior and the Defense Plant Corporation of the United states Department of Commerce. Assistance In collecting the records was rendered by the following organizations: Colorado: Denver Board of Water Comnissioners, Bureau of Reclamation of the United States Department of the interior, and Uncompahgre Valley Water Users' Association. Utah: National Park Service and Bureau of Reclamation, both of the United States Department of the Interior, and Utah Power & Light Co. , Wyoming: Bureau of Reclamation of the United States Department of the Interior.

DIVISION OF WORK The stream-gaging work was conducted by the- water resources branch of the Geological Survey, Glenn L. Parker, chief hydraulic engineer, Carl G. Paulsen, assistant chief hydraulic engineer, and Rudolph G. Kasel, chief of the division of surface water. The data for the stations In the several States were collected and prepared for publication under the supervision of district engineers as follows: In Arizona, In California, In Nevada, and for Puerco River at Gallup, N. Max., and Gila River below Blue Creek, near Vlrden, N. Max., J. H. Gardiner; In Colorado (except for Los Pinos River at Ignacio), Robert Follansbee, the work being done In collaboration with M. C. Hinderllder, State engineer, and L. T.' Burgess, State chief hydrographer; In New Mexico (except for the two stations named above) and for Los Pinos River at Ignacio, Colo., Berkeley Johnson; in Utah (except for the three stations named below), Mi T. Wilson; In Wyoming and for Green River near Linwood, Utah, Sheep creek near mnlla, Utah, and White River near Watson, Utah, Robert Follansbee. The records were reviewed and the manuscript prepared for publication under thfe di­ rection of B. J. peterson, hydraulic engineer In charge, and F. J. Flynn, associate engi­ neer, section of reports. GAGING STA'dCN RECORDS 13

COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM Colorado River near Grand Lake, Colo. Location.- Water-stage recorder, lat. 40Q14', long. 105°51', in see. 13, T. 3 N., R. 76 to., naif a mile upstream from Grand Lake Outlet and 3 miles south of town of Grand Lake. Drainage area.- 101 square miles. rtecprgi available.- July 1904 to September 1909, September 1910 to September 1918. my JLS34 to septemoer 1944. Average discharge.- 23 years, 115 second-feet. discharge during year, 403 second-feet June 11 (gage height. 4.42 *- ' '- 9.4 second-feet Jan. 17-19.

by Grand.River ditch through La Poudre Pass to Cache la Poudre River Basin are given in following table: Month Acre-feet Hay...... 252 . 9,480 6,000 906 16 Total.... 16,650 Discharge, in second-feet, water year October 1943 to September 1944 Da? Oct. NOT. Deo. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 20 35 14 10 10 11 13 109 340 178 16 18 2 20 25 14 10 10 11 13 114 531 179 IS 18 3 20 25 14 9.8 11 11 IS 140 325 812 14 80 4 20 26 14 10 11 11 16 123 284 203 13 81 5 20 27 15 9.8 11 11 18 131 282 179 16 21 6 20 24 15 9.8 11 11 20 193 251 160 16 21 7 20 20 16 10 11 11 23 210 290 136 16 21 8 20 19 16 10 11 11 26 222 290 109 IS 19 9 21 20 16 10 11 11 2S 235 296 104 15 19 10 21 22 16 9.S *11 11 27 248 346 93 15 19 11 20 25 16 9.8 11 11 27 235 367 S7 14 17 12 26 29 15 9.6 11 11 53 225 349 68 15 16'16 13 29 31 15 9.6 11 11 36 245 313 60 16 14 S3 31 16 . *9.8 11 11 32 273 310 51 15 15 15 33 *S2 15 9.8 11 11 30 293 298 44 15 15 16 31 28 *15 9.6 11 *11 27 276 322 42 16 15 17 32 25 15 9.4 10 11 *24 279 322 35 15 15 18 32 26 15 9.4 10 11 24 245 290 27 14 15 19 33 27 15 9.4 10 11 26 254 298 50 12 14 20 34 25 15 9.6 10 11 25 262 322 48 11 13 21 32 22 15 9.7 10 12 26 256 316 51 10 13 22 29 22 15 9.6 10 12 25 243 316 36 alO 13 23 S3 22 15 10 11 12 25 270 284 32 alO 12 24 36 22 14 10 11 12 32 296 264 32 alO 12 25 31 ss 13 10 11 12 45 287 287 41 a!2 12 26 S3 19 13 10 11 12 48 273 259 30 «15 1£ 27 34 15 12 11 12 57 248 227 25 a!4 a!2 28 34 14 11 10 11 12 64 254 193 22 13 all 29 35 15 10 10 11 13 114 265 205 20 14 all 30 38 13 10 10 13 82 296 191 20 15 all 31 37 10 10 13 328 19 .16 Second u««»* .».«. Runoff in Month foot-days "a*18""1 Minima Mean acre-feet Ooto her...... 877 3S 20 28.3 1,740 Movember 706 35 13 23.5 1,400 Dec* her...... 439 16 10 14.2 871 Calender year 1943 ...... 24,788 511 10 67.9 49,170 Janudry 304.47 10 9.4 9.83 604 Febr 311 11 10 10.7 617 Haro 355 13 11 11.5 704 1...... 1,001 114 13 33.4 1,990 £? 7,331 328 109 236 14,540 June 8,788 367 191 293 17,430 July 2,374 212 19 76.6 4,710 Augu 431 16 10 13.0 855 September...... 466 21 11 15.5 924 Water year 1943-44 ...... 23>383.7 367 9.4 63.9 46,380 * Winter discharge measurement made an this day. , a Ho gage-height record; discharge computed on basis of 1 discharge measurement and records for station at Qranby. Hote.- Stage-discharge relation affected by ice HOT. 3-26, Apr. 17-24. Ho gage-height record Hoy. 27 to Apr. 16 (stage-discharge relation probably affected by Ice duping entire period); discharge computed on basis of 6 discharge measurements and weather records. Tiata basis; Mountain war time. To convert war time to standard time, subtract 1 hour. ' 14 COLORADO RIVER MAIN STEM

Colorado River near Oranby, Colo.

Location.- Water-stage recorder, lat. 40°07', long. 105°54', In sec. 22. T. 2 N., R. 76 w., it miles upstream from willow Creek and 4 miles northeast of CSranby. Drainage area.- 322 square miles. Records available.- June 1908 to September 1911, my 1934 to September 1944. Average discharge.- 13 years, 325 second-feet. Extremes.- Maximum discharge during year, 1,950 second-feet June 11 (gage height, 3.68 reetj: minimum dally, 24 second-feet Feb. 19-21. 1908-11, 1934-44: Maximum discharge observed, 4,100 second-feet June 20, 1909 (gage height, 5.5 feet, datum then In use); minimum observed, 20 second-feet Apr. 6, 1936 (discharge measurement). Remarks.- Records excellent except those for periods of ice effect or no gage-height record, which are fair. Diversions above station for Irrigation. For transmountaln diversions by Grand River ditch through La Poudre Pass to Cache la Poudre River Basin see preceding page. Cooperation.- Sixteen discharge measurements furnished by Bureau of Reclamation.

Discharge, in second-feet, Water year October 1943 to Septemberl944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 71 66 , 44 26 31 *2S 42 92 1,600 1,130 173 62 P 69 64 46 28 33 30 44 90 1,500 1,050 170 59 3 69 60 46 *29 32 31 46 75 1,390 1,050 166 57 4 . 60 46 *31 32 32 48 66 1,190 997 173 57 5 «62 4S 29 33 32 52 67 1,020 961 152 55 6 62 57 50 28 32 32 53 135 372 893 152 50 7 50 30 29 *32 64 194 1,020 308 148 43 R 45 50 30 29 33 63 204 1,150 776 142 47 9 50 48 28 29 *34 64 208 1,290 657 138 45 10 27 *31 35 58 235 1,660 622 135 44 n 55 «62 43 26 29 34 62 235 1,360 594 128 44 IP 66 38 26 26 34 74 223 1,720 544 125 41 39 26 27 35 90 286 1,590 466 115 41 14 66 64 42 *26 28 35 , 74 406 1,540 442 112 41 15 66 60 36 27 29 35 1 60 622 1,510 395 109 39 64 62 «34 27 29 «36 50 864 1,640 370 112 39 37 62 55 35 «26 *28 36 46 1,100 1,620 340 104 39 18 62 57 36 *25 25 35 52 898 1,460 315 98 37 Ifl 59 38 26 24 34 64 720 1,500 310 92 37 20 57 42 27 24 34 64 636 1,740 360 95 35 69 57 43 27 *24 35 «60 608 1,830 406 90 35 22 71 55 43 26 27 35 57 650 1,810 360 84 34 57 42 26 29 36 55 824 1,660 325 77 54 55 40 «27 29 36 59 1,130 1,610 315 77 32 25 64 55 34 «S6 30 36 62 1,270 1,700 335 112 32 Oe 64 42 35 «28 29 36 64 1,120 1,580 305 115 34 66 40 31 «28 28 35 80 943 1,420 273 98 32 PR 66 42 30 27 28 35 64 872 1,210 251 90 32 2f» 41 31 26 28 36 87 988 1,230 231 84 54 30 32 26 _ 3S 90 1,290 1,23O 215 82 35 31 69 " 28 28 - 40 - 1,56Q - 198 69

Second- Runoff in Month foot-clays Maximum Minimum Mean acre-feet 2,010 71 55 64.8 3,990 1,662 68 40 55.4 3,300 December ...... 1,247 50 28 40.2 2,470 Calendar year 1943 ...... 107,093 1,800 27 293 212,400

34 4 April ...... May...... July...... 16,299 1,130 198 32,330 69 September...... 1,251 62 32 41.7 2,4SO Water year 1943-44 ...... 93,491 1,860 24 255 185,400 * Winter discharge measurement made on this day. Bote.- Stage-discharge relation affected by ice Bov. 4, 6-15, Bov. 27 to Apr. 19 (no gage-height record Jan. 6-14, Mar.'17 to Apr. 17). Time basis; Mountain war time. To convert war time to standard time,-subtract 1 hour. COLORADO RIVER J&IN STEM 15

Colorado 1Uyer at Hot Sulphur Springs, Colo.

Location.- Water-stage recorder, lat. 40°05', long. 106°05', In sec. 1, T. 1 N., R. 78 w., i mile east of Hot Sulphur Springs and 3 miles upstream from Beaver Creek. Drainage area.- 782 square miles. Records available.- July 1904 to September 1909, September 1910 to September 1924, uocooer ±92& to September 1928, and October 1933 to September 1944 In reports of Geological Survey. July 1904 to September 1909, September 1910 to September 1924, and October 1925 to September 1944 In reports of State engineer. Records of monthly discharge prior to October 1938 have been republlshed, with some revisions and ad­ ditions, In Water-supply Paper 918. Average discharge.- 38 years (1904-9, 1910-24, 1925-44), 685 second-feet. Extremes.- Maximum discharge during year, 3,620 second-feet June 11 (gage height, 3.68 reet); minimum dally, 65 second-feet Sept. 23-26. 1904-9, 1910-24, 1925-44: Maximum discharge observed, 10,300 second-feet June 15, 1921 (gage height, 8.7 feet, site and datum then In use); minimum dally discharge determined, 36 second-feet Dec. 30, 31, 1931. , . Remarks.- Records excellent except those for period-of ice effect, which are fair. Dl- versions' above station for Irrigation. Transmountaln diversion through Pioneer bore of Moffat tunnel from Fraser River Basin to South Platte River Basin. Total flow diverted during water year 1944 was 16,390 acre-feet (see p. 48 for record by months). For transmountaln diversion by Grand River ditch through La Poudre Pass to Cache la Poudre River Basin (see p. is).

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 150 129 90 74 74 86 145 300 2,990 1,560 2 IS 115 2 143 109 94 72 84 8S 145 335 2,740 1,460 209 109 3 133 10S 90 74 SO 90 160 258 2,590, 1,420 200 106 4 129 110 92 76 S4 92 190 222 2,260 1,350 188 106 5 126 112 96 74 68 .98 230 276 2,040 1,260 184 104 6 126 92 98 72 90 92 250 406 1,7 SO 1,200 184 101 7 123 80 100 74 86 92 270 580 1,980 1,080 184 93 8 120 S8 100 76 S6 S8 290 564 2,210 930 172 S9 9 118 96 92 78 86 92 310 531 2,480- 848 172 89 10 115 108 96 74 S3 96 290 626 3,180 803 172 69 '785 ,1,1 113 112 92 70 «89 96 295 636 3,460 164 39 12 123 115 S4 70 86 96 373 612 3,220 708 153 86 13 129 111 S2 70 84 98 428 767 2,910 604 150 84 14 129 106 90 72 88 100 281 980 2,820 552 146 82 15 129 96 86 74 90 100 216 1,320 2,740 510 146 84 16 126 «lol 82 *72 90 105 168 1,620 2,930 492 153 82 17 126 93 «eo 70 86 «107 160 1,950 2,660 450 143 75 18 123 1O9 S2 68 S2 107 168 1,660 2,550 412 136 73 18 126 112 86 66 80 1O5 200 1,450 2,570 390 146 73 20 1SS 96 90 70 76 105 180 1,260 2,910 462 164 73 21 123 93 92 72 78 105 188 1,250 3,060 566 ISO 73 22 123 109 90 70 82 110 »180 1,330 2,990 504 140 68 23 133 115 90 70 86 115 168 1,640 2,62O 439 133 65 24 123 1O6 9O 72 90 120 172 2,130 2,400 422 126 65 25 123 112 80 74 90 125 222 2,310 2,520 474 . 157 65 26 123 S4 84 74 90 125 2ie 2,130 2,420 422 176 68 27 123 80 80 74 86 125 263 1,640 2,100 368 150 66 28 123 82 7S 76 86 120 325 1,750 1,740 320 140 68 29 123 86 80 74 S6 130 325 2,000 1,750 290 133 68 30 129 68 82 74 . 135 330 2,390 1,700 272 129 75 31 129 " 78 72 " 145 - 2,930 - 250 123

Seccnd- Runoff in Month f cot-days Maximum Minimum . Mean acre-feet

3,03S 129 December...... 2,726 loo 76 67.9 5,410 Calsndar year 1943 ...... 188,742 3, ISO 78 517 374,400 4 460 February on March...... Infi 238 Hay...... 2 55O £50 September...... 2,483 115 65 82.8 4,920 Water year 1943-44 ...... 168,405 3,460 65 460 334,000 * Winter discharge measurement Bade on this day. Hote.- Stage-discharge relation affected by Ice Hov. 3-12, Hov. 27 to Apr. 9. Time baale; Mountain war time. To convert war time to standard time, subtract 1 hour. 16 COLORADO RIVER MMN 8TEM

Colorado River near DotseroJ Colo.

Location.- Water-stage recorder, lat. 39°39«, long. 107°05', In sec. 6, T. 5 3,, R. 86 w., 1* miles west of Dotsero and 1$ miles downstream from Eagle River. Drainage area.- 4,390 square miles. Records available.- December 1940 to September 1944. Extremes.- Maximum discharge during year, 10,000 second-feet June 2 (gage height, 8.19 reetj; minimum dally, 350 secono>feet Jan. 5. 1940-44: Maximum discharge, 15,400 second-feet June 7, 1942 (gage height, 10.02 feet;; minimum dally, that of Jan. 5, 1944. , Remarks.- Reconls good except those for period of Ice effect, which are fair. Flow partly regulated by Green Mountain Reservoir on Blue River (capacity, 146,900 acre- feet usable storage). Cooperation.- Gage-height record furnished by The Public Service Co. of Colorado.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOV. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1,020 868 1,000 750 720 664 340 1,050 9,340 5,770 1,640 1,130 9S1 82S 1,080 640 760 714 786 959 9,620 5,430 1,470 1,120 3 90S 945 1,180 720 820 756 726 1,170 3,520 5,120 1,360 868 4 822 854 1,200 540 850 709 756 1,030 7,260 4,960 1,410 780 5 798 1,280 1,200 350 860 682 952 980 6,260 4,580 1,310 732 903 1,280 960 450 870 616 1,280 1,080 6,410 '4,120 1,150 875 804 1,120 880 680 720 507 1,270 1,370 6,150 3,730 1,100 822 834 903 1,250 600 700 600 1,390 1,770 6,830 3,400 1,220 840 924 1,040 1,220 540 .780 676 1,460 2,140 7,280 3,060 1,250 868 10 910 1,300 1,180 600 820 720 1,290 2,460 8,330 2,540 1,230 738 11 804 1,19O 1,020 650 700 750 1,160 2,750 8,790 2,390 1,210 69S 854 1,350 970 450 680 768- 1,460 2,950 8,770 2,690 1,130 600 13 1.060 1,320 680 360 700 798 1,560 3,630 8,630 2,450 924 828 14 924 1,250 S20 380 709 654 1,640 4,530 8,350- 2,240 744 798 15 917 1,040 1,000 420 556 76S 1,430 5,520 8,060 2,120 931 774 924 952 1,110 460 726 687 1,240 7,060 8,280 2,110 980 828 17 1,020 952 1,000 440 732 720 996 3,120 3,040 2,000 1,090 714 18 959 1,140 1,000 430 744 732 945 7,220 6,930 1,990 1,240 610 1ft 698 1,300 1,010 430 780 720 996 6,300 6,640 1,97O 1,310 67.6 20 1,170 1,180 950 460 744 69S 1,040 5,610 7,760 2,010 1,120 660 21 1,090 1,190 1,020 550 792 570. 1,000 4,950 3,160 2,000 931 688 Vf, 1,040 966 1,180 580 551 «66O 959 4,930 8,370 2,220 1,180 698 23 1,150 »1,160 1,170 780 660 676 822 5,480 7,880 2,020 1,020 688 24 1.080 1,300 1,180 620 762 704 774 6,720 7,440 1,860 966 6S4 25 910 1,360 1,060 680 698 660 698 7,220 7,260 2,050 1,000 551 780 1,390 850 520 676 744 823 7,140 7,120 2,110 1,170 459 1,080 1,060 590 440 632 621 952 6,400 6,780 2,010 1,260 688 28 966 950 490 520 638 471 966 6,130 6,200 1,820 1,050 768 29 1,020 800 710 620 560 816 1,280 6,780 5,770 1,710 1,160 756 30 1,170 840 890 600 804 1,140 7,9OO 5,730 1,640 1,180 768 31 1,170 ~ 940 680 - 828 - 8,850 - 1,640 1,150 - Seccnd- Runoff in Monty fcct-days Maxima Minimum Mean acre-feet 29,635 1,170 698 956 58,780 November...... 33,108 1,390 800 1,104 65,670 Deoenber...... 30,79O 1,250 490 993 61,070 Calendar year 1943 ...... 849,487 11,300 440 2,327 1,685,000

722 arch...... 21,483 693 42,610 I fkOO May...... 1.40 199 4,523 278,100

744 1,158 September...... 22,669 1,130 459 756 44,960 Water year 1943-44 ...... ,697,286 9,620 350 1,905 1,383,000 Winter discharge measurement made on this day* Hote.- Stage-discharge relation affected by ice Nov. 28 to Jan. 9; no gage-height record Jan. 10 to Fet. 13. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. COLORADO RIVER MHN STEM 17

Colorado River at Glenwood Springs, Colo.

Location.- Water-stage recorder, lat. 39°33', long. 107°19', In sec. 9, T. 6 S., R. 89 w., at Glenwood Springs, half a mile upstream from Roaring Fork. Datum of gage Is 5,720.71 feet above mean sea level, adjustment of 1912. Drainage area'.- 4,660 square miles. ' Records available.- May 1899 to September 1944. Records of monthly discharge prior to octooer i»38 nave been republlshed,wlth some revisions, In Water-Supply Paper 918. Average discharge.- 45 years, 2,934 second-feet. Extremes.- Maximum discharge during year, 10,600 second-feet June 2 (gage height, 7.88 reet); minimum dally, 306 second-feet Jan. 5. , ^ 1900-1944: Maximum discharge^30,100 second-feet June 14, 15, 1918 (gage height, 12.55 feet); minimum dally, 286 second-feet Jan. 22, 1935. Remarks.- Records good except those'for periods of no gage-height record, which are fair. Diversions above station for Irrigation. Low flow regulated by Shoshone power plant 6 miles above station. Record of water analyses for the water year 1944 are given In Water-Supply Paper 1022.

Discharge, In second-feet, water year October 1943 to Septenber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1,110 a940 1,100 934 742 726 1,070 1,380 9,780 6,270 1,680 1,110 1,100 a 830 1,140 696 817 661 1,180 1,360 10,200 5,990 1,450 1,040 907 al,040 1,160 675 862 925 880 1,480 9,340 5,660 1,460 958 SZ7 a820 1,160 , 703 880 782 898 1,410 7,860 5,610 1,410 886 5 734 al,010 1,280 306 898 788 1,210 1,300 6,810 5,120 1,360 628 943 al,410 1,150 580 1,040 750 1,360 1,280 7,050 4,620 1,350 844 844 1,350 886 622 808 604 1,740 1,520 6,870 4,150 1,210 817 80S 1,090 1,38O 808 774 668 1,740 1,960 7,410 3,870 1,140 758 868 871 1,350 a650 826 844 1,750 2,600 7,900 3,450 1,340 934 10 990 1,350 1,320 a680 835 934 1,850 3,070 9,140 3,170 1,330 916 826 1,340 1,240 a7EO 742 1,020 1,470 3,480 9,690 3,150 1,220 661 703 1,300 1,030 668 703 1,040 1,690 3,710 9,850 2,950 1,220 710 1,060 1,340 628 335 898"758 1,100 1,850 4,310 9,750 2,690 1,060 808 1,190 1,350 710 390 826 2,100 5,250 9,460 2,420 726 774 15 916 1,260 1,160 425 758 871 .1,890 6,240 9,110 2,320 675 766 868 774 1,150 496 734 907 1,880 7,290 9,270 2,260 1,020 758 1,000 880 980 450 71O 916 1,680 8,180 9,050 2,200 1,070 742 1,170 1,100 1,000 455 526 907 1,330 7,440 7,800 2,150 1,190 703 759 1,880 1,080 435 675 880 1,420 6.510 7,410 2,120 1,260 616 20 661 1,260 835 508 689 907 1,400 5,990 8,540 1,890 1,250 742 1,380 1,240 943 592 790 742 1,390 5,870 9,210 2,080 1,050 710 22 1,140 1,120 1,26O 586 628 782 1,320 5,140 9,240 2,250 990 710 23 1,080 970 1,270 925 592 532 1.B70 5,740 8,890 2,040 1,160 682 1,180 1,270 1,220 766 808 934 1,070 6,930 8,310 1,840 1,010 710 25 1,080 1,280 1,120 622 782 790 961 7,440 7,960 2,090 1,030 664 26 750 1,330 943 628 774 774 1,060 7,530 7,770 2*130 1,070 566 961 1,270 574 450 610 718 1,220 6,930 7,560 1,980 1,220 . 544 al,120 1,110 520 586 750 703 1,140 6,630 6,900 1,810 1,260 742 29 al,100 S44 871 782 898 808 1,390 7,140 6,450 1,680 1,020 75ff 30 al,270 880 952 640 654 1,480 8,180 6,300 1,660 i, 140 758 31 al,£70 - 1,100 808 - 889 ~ 9,370 - 1,640 1,080 - Secoad- Runoff In Month foot-days Maximum MinlmiB Mean acre-feet 30,472 1,380 661 985 60,440 Noveober 33,909 1,410 774 1,130 67,260 December...... 32,452 1,380 580 1,047 " 64,370 Calendar year 194? ,...,,.,...... ,,..... 921,168 12,200 338 2,524 1,827,000 Ja&u&ry 18,861 934 306 60S 37,410 22,307 1,040 586 769 44,250 25,376 1,100 532 819 50,330 42,689 2,100 880 1,423 84,670 Unw 152,060 9,370 1,280 4,905 301.600 250,880 10,2OO ,6,300 8,363 497,600 July...... '...... 93,080 6,270 1,640 3,003 184,600 36,461 1,680 675 1,176 72,320 Septenber...... 22,869 1,110 544 762 46,360 Hater year 1843-44...... 761,416 10,200 306 2,080 1,510,000 . a Ho gage-height record; discharge computed on basis of records for station near Dotserc and weather records. Time basis; Hountain war tine. To convert war time to standard tiae, subtract 1 hour. IB COLORADO RIVER MAIN. STEM

Colorado River near Cameo, Colo.

Location-- Water-stage recorder, lat. 39°13', long, 108°15', In sec. 6, T. 10 S., R. 97 W., 3.4 miles upstream from Plateau Creek and 6.7 miles northeast of Cameo. Drainage area:- 8,055 square miles.

Records available.- October 1933 to September 1944. Records of monthly discharge prior to uctooer X93b nave been republished In Water-Supply Paper 918. Average discharge.- 11 years, 3,997 second-feet.

Extremes.- Maximum discharge during year, 19,000 second-feet May 31 (gage height, 8.23 feet); minimum dally, 800 second-feet Jan. 6. 1933-44: Maximum discharge, 36,000 second-feet June 16, 1935 (gage height, 10.91 feet); minimum dally, 700 second-feet Dec. 29, 1939. Remarks.- Records excellent except those for periods of Ice effect or no gage-helgit record, which are fair. Marsy diversions above station for irrigation. Records of water analyses for the water year 1944 are given In Water-Supply Paper 1022.

Rating table, water year 1943-44, except period of Ice effect (gage height, In feet, and discharge, In second-feet) (Shifting-control method used Aug. Z to Sept. 30) 1.0 750 4.2 5,340 1.4 1,120 5.1 7,360 2.0 1,780 6.4 11,100 3.0 3,300 8.1 18,300 Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1,880 3,2SO 1,670 1,780 1,430 1,320 1.400 3,430 17,600 11,900 3,060 1,710 2 1,920 1,870 1,860 1)1,500 1,380 1,210 1 ,470 2,340 18,200 11,600 2, 380 1,710 3 1,900 1,680 1,990 1,200 1,420 1,360 1 ,500 2,300 17,200 11,300 2, 770 1,660 4 1,750 1,870 1,970 1,220 1,440 1,470 1 .360 2,260 14,700 11,300 2, 580 1,630 5 1,620 1,720 1,940 1,240 1,430 1,380 1,480 2,100 13,200 10,500 3,500 1,390 6 1,600 1,950 1,970 800 1,500 1,380 1.730 2,110 11,400 9,660 3,400 1,250 7 1,760 2,220 1,790 940 1,520 1,220 1 ,900 2,530 11,600 8,760 Z, 540 1,420 8 1,640 2,040 1,710 1,180 1,420 1,120 Z ,180 3,170 12,000 8,010 2, LOO 1,380 9 1,620 1,820 2,170 1,280 1,380 1,160 £ .220 3,810 13,000 7,080 Z, 360 1,350 10 1,700 1,730 2,060 1,150 -1,480 1,300 2,280 4,750 15,400 7,000 2,170 1,430 11 1,600 2,120 1,990 1,230 1,500 1,290 2.280 5,440 17,200 6,400 2,110 1,400 12 1,650 2,100 1,790 1,330 1,300 1,310 £ ,080 6,230 17,600 6,430 2» 340 1,180 13 1,570 2,100 1,590 l',240 1,300 1,450 Z ,440 7,100 16,800 5,780 1, 370 1,210 14 1,900 2,120 1,430 930 1,350 1,530 . Z ,610 9,370 16,300 5,380 1, 380 1,270 15 1,980 2,110 1,500 1,000 1,460 1,560 S ,600 11,800 15,900 4,980 1,560 1,320 16 1,850 1,970 1,900 1,120 1,330 1,420 2.290 14,600 16,000 4,690 1,480 1,380 17 1,760 1,700 1,660 1,170 1,300 1,350 Z ,280 17,200 15,900 4,590 1, 720 1,370 18 1,890 1,720 1,590 1,300 1,180 1,390 S ,020 15,400 14,400 4,330 1, 790 1,270 19 2,020 1,900 1,680 1,300 1,130 1,390 1 .910 12,300 13,600 4,250 1, 330 1,220 20 1,620 2,050 1,780 1,050 1,220 1,360 l",860 10,900 14,600 4,140 1,910 1,160 21 1,710 1,990 1,590 1,120 " 1,230 1,410 1.860 10,100 16,500 4,310 1,830 1,200 22 2,050 1,990 1,640 1,300 1,380 1,270 1 ,910 10,000 16,400 4,230 1»<340 1,210 23 1,880 1,910 1,870 1,180 1,200 1,270 1 ,910 11,100 16,000 4,250 1,'700 1,200 « 24 1,900 1,830 1,830 1,480 1,160 1,060 1 ,740 13,300 15,300 4,010 I/no 1,120 25 1,970 2,020 1,730 1,300 1,300 1,410 1 ,580 14,300 15,100 3,990. 1,610 1,160 26 1,700 2,030 1,590 1,200 1,280 1,340 1 ,580 14,800 15,100 4,090 1,720 1,140 27 1,640 2,020 1,500 1,160 1,260 1,320 1 ,560 13,900 15,300 3,910 1,<'SO 1,060 28 1,870 1,860 1,300 1,160 1,080 1,220 2 ,120 12,500 13,100 3,670 !»'360 1,050 29 1,880 1,780 1,350 1,220 1,160 1,220 2 ,530 13,400 12,200 3,430 1,'fVO 1,260 30 3,050 1,580 1,640 1,380 - 1,330 2 ,580 15,300 12,200 3,320 l»fi60 1,240 31 2,050 1,620 1,280 - 1,290 - 17,300 - 3,190 1,730 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 56,130 2,050 1,57 3 1,811 111,300 November...... 58 , 070 2 280 1,58 3 1,936 115,200 December...... 53,740 SA70 1,30(3 1,734 106,600 Calendar year 1943 ...... 1,486,370 21,100 62 3 4,070 2,946,000 January...... 37 490 1,730 80 \ 1 209 'V4, 360 February...... 38^540 1,520 1,08 ) l!329 76,440 March...... 41,080 1,580 1,06<) 1,325 81,480 April ...... 59,350 2,610 1,36 I Q_ 975 117,500 May...... 284,530 17,300 2,10(3 9,178 564,400 June ...... 448,600 18,200 11,40(3 14,953 889,800 July ...... ,...... 190,380 11,900 3,19 5 6,141 377,600 August v 62,010 3,060 1,48 ) 2,000 123,000 -September...... 39,140 1,710 1,06<) 1,305 77,630 Water year 1943-44 ...... 1,368,960 18,200 60(3 3,740 2,715,000 Hote. - Ho gage-height record Oct. 1-18, Jan. 3' to .Mar. 1; discharge computed on basla of records for Colorado River and Roaring Pork at Olenwood Springs, b Stage-discharge relation affected by Ice. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. COLORADO RIVER MAIN STEM 19

Colorado River near Cisco, Utah

Location.- Water-stage recorder, lat. 38°49', long. 109.°18', In NWi sec. 17, T*. 23 S., RT"2S~E., 1 mile'downstream from Dolores River, 11 miles south of Cisco, 97 miles upstream from Green River, and 235 miles upstream from' San Juan River. - Drainage area.- 24,100 square miles. Records available.- November 1914 to September 1917, October 1922 to September 1944. uctooer j.yj.3 to November 1914 at site 31 miles downstream, published as Colorado River near Moab. Records equivalent. Also calendar year estimatee 1895-1910 and monthly estimates January 1911 to September 1913 and octobfer 1917 to September 1922. Records of monthly discharge prior to October 1938 have been republished, with some revisions and additions, in Water-Supply Paper 918. Average discharge.- 26 years (1913-17, 1922-44), 8,314 second-feet. Extremes.- Maximum discharge during year, 53.600 second-feet f&y 17 (gage height, 16.25 reet;: minimum, 1,470 second-feet Sept. 14 (gage height, 1.51 feet). 1914-17, 1922-44: mximum discharge, 76,800 second-feet June 19, 1917 (gage height, 19.7 feet); minimum recorded, 558 second-feet July 21, 1934 (gage height, 0.44 foot); maximum discharge known, about 125,000 second-feet July 4, 1884, from flood record at Frusta. Remarks.- Records excellent except those for period of ice effect^ which are fair. Diversions above station fpr Irrigation and power, including transmountaln diver­ sions. Records of water analyses and sediment loads, for water year 1944, are given in Water-Supply Paper 1022.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 3,010 3,780 2,370 2,560 2,540 2,470 2,390 9,630 39,100 22,500 4,130 1,S7O 2 2,89C 3,950 2,900 2,590 2.80C 2,760 2,680 10,40C 39,200 22,000 3,650 1,900 3 2,800 3,510 3,170 2,390 2,740 2,420 2,900 10,500 39,600 21,200 3,510 1,930 4 2,730 3,320 3,300 2,300 2,83C 2,680 2,310 8,840 39,400 21,000 3,170 1,900 5 2,570 3,430 3,250 1,900 2,810 2,990 2,310 9,510 34,200 20,700 3,050 1,840 6 3,490 3,340 3,250 1,300 2,810 2,850 3,300 9,480 28,500 19,500 2,960 1,680 7 2,420 3,740 3,360 1,800 2,85G 2,590 4,490 12,90C 26,600 W,900 2,830 1,610 n S,500 3,970 3,450 *1,700 3,030 2,500 5,540 17,60C 27', 800 16,100 2,760 1,550 9 2,450 3^760 3,340 1,600 2,810 2,370 6,080 20,80C 29,600 14,400 2,590 1,610 10 2,470 3,450 3,510 1,700 *2,800 2,170 6,220 24,000 31,100 13,200 2,500 1,590 11 2,540 3,380 3,600 1,800 2,710 2,440 5,920 25,600 35,600 12,300 2,540 1,610 12 2,760 3,830 3,430 1,900 2,56C 2,620 5,630 28,60C 37,700 11,500 2,540 1,640 13 2,890 3,830 3,170 *1,900 2,45C 2,830 6,340 31,800 36,600 10,500 2,420 1,600 14 2,990 3,810 3,030 2,000 2,35C 2,980 7,400 36,600 33,400 9,300 2,300 1,480 15 3,190 3,790 2,810 2,100 2,450 3,230 6,810 43,300 32,300 3,330 2,140 1,540 1R 3,210 3,780 2,870 2,200 2,640 3,300 5,830 43,500 30,700 7,660 1,810 1,580 17 2,960 3,630 3,070 2,300 *2,620 3,050 5,280 51.90C 30,8W 7,130 1,750 1,670 in 2,890 3,430 2,990 2,300 2,45C 2,350 5,340 51,OOC 28,200 6,810 1,840 1,630 19 3,530 3,330 2,760 2,400 2,540 2,760 5,060 f39,20C 25,900 f6,380 1,909 1,600 20 3,470 3,530 2,920 2,400 2., 440 2,760 4,390 f32,400 26,100 f6,200 2,090 1,710 ?.l 3,170 3,620 3,170 2,560 2,520 2,850 4,430 30,300 28,600 f6,380 2,300 1,610 2?. 3,210 4,110 3,070 *2,640 2,540 2,960 4,430 S9,40C 30,300 6,930 2,270 1,600 7.7, 3,490 4,130 3,170 2,470 2,71C 2,800 4,150 31,70C 30,100 6,470 2,060 1,650 24 3,280 3,640 3,300 2,610 2,580 2,690 4,390 35,70C ,23,000 6,360 1,S40 1,630 25 3,260 3,450 3,320 2,800 2,500 2,5?0 4,330 40,100 26,000 6,520 1,960 1,630 26 3,360 3,600 3,260 2,SOO 2,810 2,660 4,640 38,900 28,600 6,760 1,900 1,590 ?7 3,170 3,570 3,160 2,300 8,710 2,740 4,530 36.80C 28,800 6,670 1,980 1,650 ffl 3,080 3,490 2,300 2,540 2,730 2,690 5,360 32,800 27,600 6,060 2,010 1,670 29 3,230 3,250 2,370 *2,590 2,420 2,570 9,040 31,000 24,200 5,450 2,060 1,640 30 3,360 3,030 *2,300 2,440 _ 2,420 10,500 33,500 22,800 4,760 2,070 1,720 31 3,620 - 2,560 2,640 - 2,4BO " 35,300 4,430 1,840 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

92 990 December. . t ...... 95,530 3,600 2,300 3,032 189,500 Calendar year 1943 ...... 2,628,530 32,700 1,800 7,200 5,214,000

3,030 2,350 2,644 152,100 2,708 April ...... 153,070 10,500 2,390 5,102 303,600 May...... 9,480 29,020 1,734,000 929,100 39,600 22,300 30,970 1,843,000 341,400 22,500 4,430 11,010 677,200 148,700 September...... 49,930 1,930 1,480 1,664 99,030 Rater year 1943-44 ...... 2,976,310 51,900 1,430 8,132 5,903,000 * Winter discharge measurement made on tnls day. f Fragmentary gage-height record; discharge computed on basis of partly estimated gage heights. Note.- Stage-discharge relation affected by ice Dec. 31 to Feb. 13 (fragmentary gage-height record Jan. 5-8, 10-13). Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. 20 COLORADO RIVm STEM

Colorado River at Lees Ferry, Arlz.

Location.- Water-stage recorder, lat. 36°51'45", long. 111°36'15", In IffiiSEi sec. 13, T. 40 N., R. 7 E., at head of Iferble Gorge at Lees Ferry, just upstream from Parla River, 28 miles downstream from Utah-Arizona State line, 79 miles downstream from San Juan River. Datum of gage is 3,106.16 feet above mean sea level, datum of 1929. Drainage area.- 107,900 square miles. -Records available.- June 1921 to September 1944. Records of monthly discharge prior to 1938, calendar year estimates 1895-1910, and monthly estimates January 1911 to Ifey 1921 published In Water-Supply Paper 918. Average discharge.- 23 years (1921-44), 17,590 second-feet. Extremes.- J&xlmum discharge during year, 94,400 second-feet May 19 (gage height, 17.20 feet); minimum dally, 3,000 second-feet Jan. 16 (during period of Ice effect); mini­ mum gage height, 5.97 feet Jan. 14. 1921-44: Ifeximum discharge, 220,000 second-feet June 18, 1921 (gage height, 26.5 feet, from floodraarks), from rating curve extended above 120,TOO second-feet on basis of rating curve for station near Grand Canyon; minimum, 750 second-feet Dec. 27, 1924 (gage height, 4.2 feet). Maximum discharge Known, about 300,000 second-feet July 7, 1884 (gage height, 31.5 feet, present site and datum, from floodmark at mouth of Parla River), from rating curve extended above 120,000 second-feet, verified at 220,000 second-feet by comparison with rating curve for station near Grand Canyon. Remarks.- Records excellent. Diversions above station for Irrigation. Records of water analyses and sediment loads for water year 1944 are given In Water-supply Paper 1022.

Discharge, in second-feat, water year October 1943 tc September 1944 Day 0«t. Ncv. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 5,600 7,040 7,2SO 6,150 5,460 6,080 S,540 13,900 72,700 56,400 18,500 ,680 2 6,180 7,ieo 7,210 5,660 5,430 6,210 S,060 19,700 76,000 53,600 11,600 ,440 3 6,540 7,560 6,9SO 5,860 5,600 6,080 7,950 20,700 78,800 53,900 10,800 ,680 4 6,180 7,810 6,570 ,840 .5,750 5,900 8,060 19,800 62,000 52,300 10,800 ,540 5 5,870 7,740 6,370 ,660 5,960 5,960 S,510 21,300 81,700 50,800 9,580 ,580 6 5,630 7,950 6,240 ,540 6,080 5,840 10,600 22,100 78,300 49,400 8,890 ,270 7 5,580 7,770 6,410 ,370 6,340 6,240 22,200 20,200 71,200 46,900 8,380 ,250 8 5,490 7,280 6,470 ,800 6,210 6,340 85,000 19,400 65,200 44,000 7,740 ,280 9 5,460 7,250 6,570 bS,940 6,280 6,810 27,600 83,300 64,500 45., 800 7,350 ,170 10 5,210 7,350 6,500 1)3,970 6,240 6,S70 89,300 33,600 67,800 37,900 6,980 ,150 11 4,990 7,380 6,500 1)3,700 6,280 6,410 28,500 38,500 68,600 34,700 6,770 3,970 12 5,070 7,700 6,810 1)3,510 6,570 6,120 27,000 43,300 71,300 38,100 6,700 3,850 13 5,180 7,600 6,840 1)3,300 6,870 6,080 24,200 46,100 75,800 89,900 6,540- 3,700 14 5,050 7,2SO 6,980 1)3,100 6,810 6,540 21,500 51,000 76,800 27,400 6,050 3,680- 15 6,260 6,670 7,110 1)3,180 6,370 6,840 20,800 57,600 74,800 25,100 6,150 3,570 . 16 5,400 7,180 6,870 1)3,000 5,960 3,540 20,500 67,700 72,500 22,700 6,840 3,510 17 5,400 7,380 6,570 b3,100 5,340 8,770 81,500 73,500 72,800 80,800 5,900 3,490 18 5,580 7,360 6,280 1)3,530 5,780 3,390 19,400 86,500 72,800 19,100 5,990 3,450 19 6,370 7,350 6,050 b3,900 5,720 8,930 18,200 91,600 69,300 17,700 5,580 3,340 20 7,350 7,320 6,840 ..1)3,680 5,600 12,500 18,200 88,300 62,700 16,500 5,660 3,840 21 7,660 7,180 5,750 3,970 5,600 15,100 17,700 74,800 58,300 16,800 6,470 3,340 22 6,640 6,980 5,840 4,060 5,660 13,000 16,100 67,100 58,900 16,900 6,180 3,380 23 6,570 7,110 5,840 4,320 5,550 11,600 15,200 65,800 62,600 15,100 5,860 3,430 24 7,040 S,540 5,810 4,660 5,550 10,700 14,500 65,200 65,400 15,800 4,890 3,430 25 7,380 10,600 5,870 5,430 5,670 9,850 13,800 68,000 65,300 15,500 4,780 3,360 26 6,940 9,640 5,990 5,840 5,640 9,600 13,400 73,000 64,100 15,000 4,740 3,320 27 7,150 8,850 5,930 6,080 6,080 9,080 12,900 77,100 66,200 14,400 4,740 3,300 28 7,110 7,810 6,080 6,120 6,280 3,660 12,700 76,300 63,200 14,700 4,540 3,880 29 6,740 7,600 6,500 6,150 6,020 9,280 12,500 72,800 63,600 14,200 4,390 3,860 30 6,810 7,460 6,600 6,150 . 9,520 13,200 68,200 62,500 13,900 4,540 5,100 SI 6,940 ~ 6,440 5,840 - 9,000 - 68,000 - 13,700 4,690 -

Second- Runoff in Month fcct-days Itexinun MiniBUB Mean acre-feet

October...... 190,310 7,660 4,990 6,139 377,500 November...... 230,110 10,600 6,870 7,670 456,400 December...... 199,100 7,280 5,750 6,483 394,900 Calendar year 1943 ...... 5,754,170 64,400 4,040 15,760 LI, 410,000 Januarvw ouucft* y ...... 140,410 6,150 3,000 4,589 278,500 February...... 173,400 6,S70 5,430 5^979 343,900 Karen...... 856,650 15,100 5,690 8 ftStV0170 509.100 April...... 51.7*620 29,300 Yj950 17 f 850 1,087,000 Mw...... 1,638,800 91,600 13,900 52,860 3,251,000 '- June ...... 2,085,100 82,000 58,300 69,500 4,136,000 July...... 898,400 56,400 13,700 2S»9SO 1,732,000 August ...... 210 380 12,500 4,390 6* "786 417,300 September...... iisjsio 5,100 3,240 3,844 828,700 Water year 1943-44 ...... 6,655,590 91,600 3,000 16,180 13,200,000 b Stage-discharge relation affected by ice. Time basist Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. COLORADO RIVER MAIN STEM. 21

Colorado River near Grand Canyon, Ariz. (Formerly published as Colorado River at Bright Angel Creek, near Grand Canyon, Ariz.)

Location.- Two water-stage recorders, lat. 36°05'55lf , long. 118°05'30lf , at Kaibab Bridge, a quarter of 'a mile upstream from Bright Angel Creek, 11 miles by trail northeast of Grand Canyon, Coconino County, 26 miles upstream from Little Colorado River, and 267 miles upstream from Boulder Dam. Datum of gages is 2,418.7 feet above mean sea level, preliminary datum of 1929. Drainage area.- 137,800 square miles. Records available.- October 1922 to September 1944. Average discharge.- 22 years, 17,950 second-feet. Records of monthly discharge prior to October 1938 have been republished in Water-supply Paper 918. Extremes.- Maximum discharge during year, 93,400 second-feet May 20 (gage height, 25.1 feet); minimum, 3,220 second-feet Jan. 17, 18. 1922-44: Maximum discharge, 127,000 second-feet July 2, 1927 (gage height, 29.25 feet); minimum, 700 second-feet Dec. 28, 1924 (gage1 height, -0.70 foot). Maximum discharge known, 300,000 second-feet about July 8, 1884 (computed on basis of flood studies at Lees Ferry). Crest discharge of flood of June 19, 1921, 220,000 second-feet (gage height, 37.5 feet, from flxsodmarks), from rating curve extended above 120,000 second-feet by logarithmic plotting. Remarks.- Records excellent. Diversions above station for Irrigation. Records of water analyses and sediment loads for water year 1944 are given *in Water-supply Paper 1022.

Discharge, in second-feet, water year October 1943 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 6.620 7,240 7,940 6,820 6,050 6,410 10,100 15,100 69,000 59,700 15,500 4,980 6,170 7,580 7,780 6,360 6,660 6,440- 9,430 17,100 73,200 54,900 12,400 4,900 6,820 7 r640 7,650 5,920 5,640 6,580 9,230 22,400 77,000 54,200 11,600 4,730 4 7, ISO 8,060 7,350 5,530 6,S40 6,480 9,510 21,500 81,000 54,100 11,100 4,850 5 6,660 8,120 7,030 5,100 6,080 6,360 10,400 21,800 85,100 52,500 10,500 4,830 6 6,400 S,120 6,800 4,S70 6,310 6,160 10,400 24,000 80,300 50,200 9,940 4,830 7 6,150 8,250 6,750 4,840 6,510 6,370 15,800 23,000 74,400 49,000 9,340 4,570 8 6,040 8,060 6,830 4,700 6,700 6,710 25,300 21,000 66,900 45,800 8,810 4,560 9 5,840 7,700 6,940 4,530 6,570 6,880 27,900 21,900 63,800 43,200 S,200 4,540 10 5,830 7,620 7,030 4,290 6,620 7,310 29,400 29,400 65,500 59,500 7,790 4,470 11 5,640 7,640 6,900 4,290 6,640 7,260 30,200 37,200 68,400 36,200 7,400 4,470 12 5,450 7,740 6,800 4,000 6,680 6,940 29,100 41,300 69,200 33,300 7,140 4,260 13 6,520 8,080 7, ISO 3,880 £,920 6,590 26,900 44,500 74,200 31,100 7,000 4,140 14 5,580 7,940 7,180 3.670 7,310 6,880 24,000 46,900 77,100 29,100 6,700 4,030 15 5,490 7,520 7,310 3,380 7,190 7,250 22,600 53,100 76,200 26,800 6,410 3,950 16 5,530 7,320 7,350 3,400 6,680 7,720 22,400 62,100 73,500 24,700 6,610 5,880 17 5,660 7,590 7,210 3,280 6,270 9,600 23,000 73,400 72,500 22,500 6,720 5,850 18 7,560 6,790 3,330 6,060 9,540 22,200 82,900 71,600 20,600 6,330 5,780 19 6,010 7,660 6,550 3,830 5,940 9,380 20,800 90,400 71,000 18,900 6,540 5,780 20 8,180 7,660 6,340 4.300 5,940 10,200 19,700 90,500 66,400 17,500 6,150 5,680 21 8,480 7,620 6,160 4,330 5,920 15,800 19,600 78,200 61-,400 16,600 6,050 5,570 22 7,940 7,520 6,160 4,290 6,060 15,200 18,100 68,600 59,600 17,800 6,720 5,620 23 7,220 7,340 6,230 4,300 5,980 13,400 16,600 66,200 61,700 16,500 6,530 5,700 24 7,320 7,420 6,290 4,550 5,890 12,000 16,000 65,100 65,000 15,500 5,530 3,780 25 7,720 9,610 6,120 5,030 5,950 11,300 14,900 66,600 65,100 15,900 5,200 3,740 26 7,7SO 10,700 6,190 5,850 6,090 10,500 14,200 70,400 63,400 15,700 5,070 5,760 27 7,340 9,830 6,290 6,260 6,270 10,100 13,900 75,600 64,600 15,000 5,150 5,730 28 7,560 9,030 6,240 6,330 6,500 9,940 14,200 76,200 65,100 14,600 5,120 5,760 29 7,470 8,260 6,400 6,260 .6,620 10,600 14,200 74,200 63,100 14,900 4,900 5,780 30 7,130 6,040 6,800 6,310 * 11,000 14,000 69,300 64,000 14,200 4,660. 6,090 31 7,150 - 7,010 6,230 - 10,800 - 66,400 14,100 4,820 Second- Runoff in Month foot-days Maximum Minima Mean acre-feet

8 480 November December...... 211,600 7,940 6,120 6,826 419,700 Calendar year 1943 ...... £,859,870 65,900 4,400 16,050 11,620,000

February

September...... 126,550 6,090 3,570 4,21S 251,000 Water year 1943-44 ...... 6,818,950 90,500 3,280 18,630 15,530,000 basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter, war * IB to standard time, subtract 1 hour. 22 COLORADO RIVER' MAIN STEM

Lake Mead at Boulder Dam, Ariz.-Nev. Location.- Water-stage indicator, lat. 36°00'59", long. 114°44'10", in SWj sec. 3, T. 30 to.', R. 23 W. Gila and Salt River meridian, in center of Boulder Dam on Colorado River. Datum of gage is at mean sea level, adjustment of 1912, or 0.21 foot above mean sea level, datum of 1929. Elevations given herein are referred to adjustnent of 1912. Drainage area.- 167,800 square miles. Records available.- February 1935 to September 1944. Records of monthly contents prior to October 1938 have been republished in Water-Supply Paper 918. Extremes.- Maximum contents during year, 24,740,000 acre-feet July 16-20 (elevation, 1,200.35 feet); minimum, 18,950,000 acre-feet Apr. 8 (elevation, 1,157.2 feet). 1935-44: Maximum contents, 27,790,000 acre-feet July 29, 30, 1941 (elevation, 1,220.45 'feet); minimum (since 1940), that of Apr. 8, 1944. Remarks.- Reservoir is formed by concrete arch-gravity type dam; storage began Feb. 1, 1935; dam completed Mar. 1, 1936. Total capacity, 32,359,000 acre-feet, consisting of the following: dead storage, 3,207,000 acre-feet below elevation 895.0 feet (gate sills in outlet towers); usable contents, 27,935,000 acre-feet between elevations 895.0 feet and 1,221.4 feet (top of automatic spillway gates in raised position); uncontrolled storage, 1,217,000 acre-feet between elevations 1,221.4 feet and 1,229.0 feet. Reservoir Is used to store water for irrigation, municipal water supply, power development, and flood control. Figures given herein represent usable contents. Records of water analyses for water year 1944 are given in Water-Supply Paper 1022. Oooperation.- Records collected and prepared in cooperation with Bureau of Reclamation.

Usable contents at IS p.m., in thousand of acre-feet, water year October 1943 to September 1944

Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 24,050 23,220 ^2g,480 21,650 20,660 19,790 19,080 19,050 21,OSO 24,040 24,600 23 ,790 2 24,030 23,190 22,450 21,640 20,630 .19,760 19,070 19,050 21 ,130 24,120 24,580 23,750 3 24, Old 23,160 22,410 21,610 20,600 19,730 19,050 19,040 21,290 24,190 24,570 23,740 4 23,980 23,130 22,390 21,580 20,560 19,700 19,020 19,040 21,420 24,260 24,550 23,720 5 23,960 23,110 22,370 21 ,540 20,530 19,680 18,990 19,040 21,560 24,320 24,530 23,680 6 23,930 23,070 22,350 21,520 20,510 19,660 IS ,930 19,050 21,660 24,380 24,520 23,650 7 23,900 23,060 22,320 21,490 20,480 19,630 13,960 19,070 21, BOO 24,450 24,500 23,620 8 23,370 23,030 22,290 21,450 20,460 19,600 18,950 19,090 21,900 24,490 24,470 23,590 9 23,840 23,000 22,260 21,430 20,430 19,580 13,970 19,090 21,990 24,550 24,450 23,550 10 23,820 22,980 22,220 21,400 20,400 19,550 18,990 19,090 22,080 24,590 24,420 23,530 11 23,790 22,950 22,190 21.3BO 20,380 19,540 19,010 19,120 22,180 24,630 24,400 23,500 12 23,760 22,920 22,180 21,330 20,340 19 ,520 19,030 19,150 22,280 24,650 24,370 23,470 13 23,730 22,900 22,140 21,300 20,320 19,480 19,040 19,200 22,370 24,680 24,340 23,440 14 23,700 22,880 22,110 21,260 20,280 19,470 19,060 19,260 22,480 24,690 24,320 23,400 15 23,670 22,850 22,090 21,230 20,250 19,440 19,070 19,320 22,580 24,710 24,290 23,360 16 23,640 22,830 22,060 21 ,200 20,220 19,400 19,090 19,390 22,690 24,740 24,260 23,330 17 23,610 22,800 22,030 21,170 20,190 19,370 19,100 19,480 22,790 24,740 24,210 23,310 18 23,530 22,780 22,010 21,130 20,160 19,350 19,100 19,590 22,910 24,740 24,190 23,270, 19 23,550 22,740 21,980 21,100 20,120 19,340 19,110 19,720 23,010 24,740 24,160 23.B30 20 23,520 22,730 21,960 21,060 20,100 19,300 19,110 19,850 23,100 24,740 24,140 23,190 21 23,49tD 22,710 21,930 21,080 20,070 19,280 19,100 20,000 23,180 24,730 24,120 23,160 22 23,460 22,680 21,900 20,990 20,030 19,270 19,100 20,110 23,260 24,710 24,090 23,130 23 23,440 22,650 21,870 20,950 20,010 19,250 19,110 20,200 23,340 24,720 24,060 23,090 24 23,420 22,630 21,840 20,920 19,970 19,240 19,110 20,290 23,410 24,710 24,030 23,070 25 23,400 22,610 21,830 20,390 19,950 19,240 19,100 20,370 23,520 24,700 24,000 23,040 26 23,370 22,580 21,810 20,860 19,910 19,230 19,090 20,450 23,600 24,680 23,970 23,010 27 23,340 22,560 21,780 20,820 19,890 19,200 19,070 20,550 23,690 24,680 23,950 22,970 28 23,310 22,550 21,760 20,780 19,860 19,170 19,07C 20,'680 23,730 24,660 23,910 22,940 29 23,230 22,530 21,720 20,760 19,330 19,150 19,060 20,780 23,S70 24,640 23,890 22,900 30 23,260 22,500 21,700 20,720 _ 19,120 19,06C 20,900 23,950 24,640 23,850 22,860 31 23,250 21,670 20,690 - 19,100 - 20,990 - 24,630 23,820 -

Monthly elevation and contents, water year October 1943 to September 1944 Change in contents Date Elevation Contents during Month (feet)t' (acre-feet) (acre-feet) / 1,195.70 24,070,000 1,139.90 23,250,000 -620,000 1,184,50 22,500,000 -750,000 1,173.35 21,670,000 -830,000 Calendar year 1943... - - -1,370,000 1,170.90 20,690,000 -980,000 1,164.20 19,830,000 -860,000 1,158.40 19,100,000 -730,000 ,158.10 19,060,000 -40,000 ,173.20 20,990,000 +1,930,000 ,194.85 23,950,000 +2,960,000 ,199.65 24,630,000 +680,000 ,193.90 33,820,000 -810,000 ,187.10 22,860,000 -960,000 Water year 1943-44... - - -1,210,000 t Elevation at 12 p.m. Time basis! Pacific war time. To convert war time to standard time, ubtract 1 hour. COLORADO RIVER MAIN STEM 23

Colorado River below Boulder Dam, Arlz.-Ney.

Location.- Water-stage recorder, lat. 36°00'15", long. 114°44'35", In SWiNEi sec. 10, T. 30 N., R. 23 W. Glla and Salt River meridian, or NWjNEi sec. 32, T. 22 S., R. 65 E. Mount Dlablo meridian, 1 mile downstream from Boulder Dam. Datum of gage Is 599.96 feet above mean sea level, datum of 1929, used locally as 600.00 feet as originally determined. Drainage area.- 167,800 square miles at Boulder Dam. Records available.- April 1934 to September 1944. Record of diversion to Basic Magnesium, Inc., April 1942 to September 1944. Records of monthly discharge prior to October 1938 have been republlshed with some additions In Water-Supply Paper 918 as Colorado River near Willow Beach, Arlz. Extremes (regulated).- Maximum discharge during year, 28,800 second-feet Mar. 13 (gage height, 5.94 feet); minimum, 7,100 second-feet Sept. 4 (gage height, 40.95 feet); minimum dally, 10,600 second-feet July 9. 1935-44: Maximum discharge, 51,200 second-feet Feb. 13, 1939 (gage height, 54.96 feet); no flow Feb. 10, 1935. Remarks.- Recoijis excellent. Flow completely regulated by Bbulder Dam since Feb. 1, 1935 (Bee preceding page). Diversions above Boulder Dam for Irrigation and Industrial uses. Diversion by pumping from Late Mead 6 miles above Boulder Dam to Basic Mag­ nesium, Inc., began Apr. 7, 1942. Records of water analyses for water year 1944 are given In Water Supply Paper 1022. ' Cooperation.- Record of diversion to Basic Magnesium,Inc., furnished by Bureau of Reclamation.

Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 19,600 19,000 22,300 15,600 23,800 24,600 22,000 19,200 19,900 18,500 20,900 20,200 2 18,300 20,100 22,700 14,400 S3, 200 24,600 15,400 19,900 16,800 11,700 20,800 19,400 3 . 14,400 20,500 22,100 21,600 23,700 23,200 22,600 20,200 17,700 16,9OO 20,800 12,900 4 19,200 20,100 20,900 21,500 22,600 22,400 24,100 19,900 12,700 15,700 20,600 14,800 5 19,800 21,300 17,800 20,300 21,100 14,800 23,000 18,500 18,000 19,100 17,700 19,400 6 20,300 20,600 §1,200 20,500 15,400 20,600 21,400 17,800 19,300 16,800 13,200 19,600 7 20,100 16,200 21,200 21,100 20,600 20,600 20,400 13,300 19,400 18,800 19,200 20,000 8 19,900 20,100 21,300 21,900 22,000 20,000 19,700 18,900 19,700 17,100 20,500 20,000 9 18,700 20,700 22,300 15,400 21,700 18,500 14,300 2O,300 20,400 10,600 21,100 19,600 10 15,300 20,400 22,000 21,300 21,300 17,800 18,700 20,400 19,200 18,200 21,600 14,600 11 18,800 20,400 21',400 21,300 20,600 19,900 20,300 19,600 11,700 19,600 21,600 19,900 12 20,300 21,200 17,100 21,400 22,000 14,500 20,600 19,700 20,300 19,600 19,900 20,500 13 21,100 20,200 21,000 21,100 18,300 23,300 19,800 19,500 20,800 20,100 13,10O 20,900 14 20,300 17,200 21,600 21,400 22,900 25,800 20,100 13,800 19,600 19,800 19,500 20,900 15 20,000 20,300 21,700 20,500 22,500 24,200 19,100 18,900 19,700 18,500 21,100 20,600 16 19,100 21,300 *21,800 18,100 22,900 23,000 13,900 20,400 20,500 11,700 21,600 19,400 17 16,700 21,200 22,900 21,300 23,700 21,800 21,000 20,600 19,200 19,400 22,000 13,800 18 20,200 20,300 22,300 21,700 23,300 21,400 22,200 19,800 12,200 20,200 21,300 19,900 19 20,500 21,300 17,900 22,300 23,300 16,100 21,600 20 ( 200 20,200 20,300 20,800 21,000 20 20,800 19,400 21,900 23,000 20,400 22,900 20,700 19,800 20,700 20,400 13,800 21,300 21 20,600 16,500 21,90*. 23,200 23,200 23,300 21,300 14,400 20,800 20,000 18,900 21,200 22 20,400 20,900 22,500 22,900 22,800 23,400 19,000 21,900 20,500 19,200 20,100 20,800 23 19,300 21,300 22,400 19,800 23,500 22,700 13,300 23,400 20,600 11,100 20,600 19,000 24 15,000 21,000 20,000 22,500 23,500 22,600 19,900 23,300 19,200 18,500 21,200 lS,300 25 19,600 17,300 12,100 23,600 24,000 20,400 20,800 23,400 12,000 20,700 21,000 19,300 26 20,800 20,100 12,500 24,200 23,900 15,400 20,400 23,600 17,600 20,600 20,300 19,300 27 21,200 19,300 20,800 24,200 17,700 22,000 20,500 22,500 16,700 20,200 14,700 19,300 28 20,100 15,100 22,100 24,600 22,700 22,700 20,500 14,300 17,800 21,200 20,200 19 ,300 29 20,200 18,900 22,300 23,500 23,500 22,600 19,500 21,400 16,300 20,500 21,300 19,700 30 19,100 22,000 22,600 19,900 _ 22,300 13,906 21,000 19,600 13,400 20,300 13,800 31 -14,600 - 21,300 22,600 - 22,200 - 23,000 - 19,900 20,300 - Diversion to Basic Second- Runoff In Month Maximum Minimum Mean Magnesium, Inc. foot-days acre-feet TacfB-feet) 594,300 21,200 14,400 19,170 1,179,000 1,390 594,200 22,000 15,100 19,810 1,179,000 1,360 643,900 22,900 12,100 20,770 1,277,000 1,250 Calendar year 1943..... 6,410,600 22,900 10 j 600 17,560 12,720,000 16,990 656,700 24,600 14,400 21,180 1,303,000 1,200 February...... 639 ,900 24,000 15,400 22,070 1,269,000 907 659 ,000 25,200 14,500 21*260 1,307,000 1,040 April...... 590,000 24,100 13,300 19,670 1,170,000 1,180 «»y...... 612,900 23,600 13,300 19,770 1,216,000 1,210 553,100 20 800 11,700 16,440 1,097,000 1,250 July...... 560,300 91 'poo 10,600 1,111,000 1,480 610,500 22*000 13,100 19 ,690 1,211,000 1,420 570,700 21,300 12,900 19,020 1,132,000 1,200 Water year 1943-44..... 7,285,500 25,200 10,600 19,910 14,450,000 14,890 Time basis; Pacific war time. To convert war time to standard time, subtract 1 hour. 24 COLORADO RIVER «MN STEM

Colorado River at Needles, Calif. fePraUoru- water-stage recorder, lat. 34°50'50", long. 114°36'35"; in NWj sec. 29, T. 9 N., R. 23 E. San Bernardino meridian, at Needles, 18 miles upstream from gaging station near Topock, Arlz., and 98 miles downstream from Boulder Dam. Datum of gage Is 466.23 feet above mean sea level, datum of 1929; gage readings have been reduced to elevation above mean sea level. Drainage area.- 170,600 square miles. Records available.- April 1931 to September 1944 (elevations only). Extremes.- mximum elevation during year, 475.33 feet Aug. 12; minimum, 472.01 feet 1931-44: mxlmum elevation, that of Aug. 12, 1944; minimum, 466.53 feet Oct. 2, 1934, site then In use. Remarks.- Flow completely regulated by Boulder Dam (see p. 22 ). Comparison of many simultaneous gage readings showed-an average difference of 0.17 foot due to slope in water surface between gage at present site and gage at site 750 feet downstream used prior to May 15, 1942.

Elevation, In feet, water year October 1943 to September 1944 009 Oct. Nov. Deo. Jan. Feb. Mar. Apr. May June July Aug. S«pt. 1 472.96 472. 2S 473.17 473.67 473.71 474.15 474.60 474.40 474.48 474.99 474.99 475.01 2 472.97 472.55 473.19 473.22 473.88 474.23 g474.62 474.67 474.56 475.00 475.09 476.03 3 472.86 472.76 473.33 473.10 473.87 474.31 g474.80 474.73 474.54 474.73 475. IB g475.03 4 472. 4£ 472.83 473.34 473.50 473.92 474.32 474.53 '474.75 474.53 474.74 478.17 8474.87 5 472.85 472.82 473.24 473.56 473.93 474.34 474.69 474.74 474.38 474.88 475.17 474.60 6 472.75 472.89 473.03 473.52 473.89 474.03 474.65 474.73 474.60 474. S7 475.10 474.93 7 472.74 472.84 473.24 473.52 473.55 47.4.36 474.55 474.66 474.72 474.86 474.97 474.95 8 472.70 472.56 473.21 473.46 473.83 474.43 474.52 474.46 474.70 474.83 475.03 478.02 9 472.71 473.00 473.17 473.54 473.93 474.43 474.64 474.74 474.71 474.88 478.14 478.04 10 472.81 473.14 473.24 473.14 473.97 474.39 474.33 474.86 474.77 474.5S 476.17 478.06 11 472.60 473.13 473.30 473.50 473.96 474.36 474.52 474.61 474.88 474.63 475.2S 474.95 12 472.92 473.05 473.30 473.63 473.89 474.47 474.70 474.76 474.63 474.8S 475.87 474.98 15 472.93 473.06 473.00 473. 4S 473.69 474.31 474.73 474.69 474.89 474.91 476.31 474.98 14 472.8S 473.01 475.19 473.40 473.75 474.67 474.68 474.69 475. OS 474.87 475.10 474.9S 15 478.83 472.73 473.29 473.33 473.88 474.49 474.71 474.42 475.00 474.91 475.03 474.93 16 472.83 472.89 473.34 473.30 473.97 474.40 474.66 474.64 475.00 474.90 475.13 474.90 IT 472.91 472.87 473.26 473.20 474.06 474.35 474.39 474.74 475.00 474.77 475.16 474.87 18 472.75 472.85 473.85 473.43 474.13 474.88 474.76 474.72 475.02 474.90 478.80 474.83 19 473.04 472.86 473.89 473.50 474.11 474.82 474.75 474.67 474.73 475.04 475.22 474.91 20 473.02 472.92 473.09 473.47 474.09 474.03 474.63 474.67 474.9S 475.07 475.28 474.94 21 472.91 472.87 473.86 473.55 474.00 474.32 474.54 474.63 475.09 475.10 474.97 475.00 28 472.73 472.68 473.28 473.61 474.08 474.35 474.51 474.39 475. OS 475.11 474.94 478.06 23 472.72 472.93 473.34 473.66 474.07 474.34 474.47 474.64 475.07 475.11 475.02 478.13 24 472.69 473.12 473.37 473.66 474.09 474.31 474.23 474.70 478.. 07 474.86 475.01 478.18 26 472.35 473.11 473.36 473.66 474.13 474.36 474.56 474,62 475.07 474.90. 475.02 474.98 26 472.79 472.90 472.85 473.73 474.21 474.34 474.64 474.60 474. SO 475.07 475.00 478.08 27 472.91 473.18 472.84 473.74 474.25 474.16 474.69 474.40 474.87 475.13 474.98 475.06 28 472.88 473.08 473.40 473.78 474.03 474.54 474.70 474.31 474.93 475.13 474.80 475.05 29 472.75 472.73 473.60 473.85 474.16 474.60 474.69 474.12 474.93 475.18 474.8S ,476,.06 30 472.67 472.97 473.64 473.81 _ 474.59 474.66 474.40 474.96 475.09 474.91 475.06 31 472.64 - 473.64 473.65 - 474.55 - 474.41 - 474. P8 474.98 g Record computed -from graph baaed on 1 staff-gage reading dally, recorded range In stage, and comparison with unpublished' record of atage at highway bridge at Topoolc, Arlz. Time basis! Mountain war time to Dec. 31, 1943} mountain standard tine thereafter. To convert war time to standard time, subtract 1 hour. COLORADO RIVER MAIN STEM 25 Colorado River near Topock, Arlz.

Location.- Water-stage recorder, lat. 34°41'15B , long. 114°27'45", In NWi sec. 13, T. 15 N., R. 21 W. Glla and Salt River meridian, In Mohave Canyon, 3 miles downstream from Topock and 39.5 miles upstream from Parker Dam. Datum of gage Is 423.02 feet above mean sea level, datum of 1929. Auxiliary water-stage recorder at highway bridge at Topock, 2.7 miles upstream, used In determining fall. Drainage area.- 172,300 square miles. Records available.- January 1917 to September 1944. Records of monthly discharge prior to October 1938, with some additions, have been republlshed In Water Supply Paper 918. Average dIs charge.- 17 years (1917-34), 20,260 second-feet (unregulated); 10 years U§34-44;, 10,460 second-feet (adjusted to include storage In Lake Mead). Extremes.- Maximum dally discharge during year, 24,000 second-feet Feb. 27; maximum ele- vatlon, 452.22 feet Aug. 6; minimum dally discharge, 14,600 second-feet July 12, 26; minimum elevation, 448.3S feet May 17. 1917-34 (unregulated); Maximum discharge probably exceeded 200,000 second-feet June 22, 1921; minimum, 1,480 second-feet Aug. 17, 1934. 1935-44 (regulated): Maximum discharge, 35,7v,0 second-feet Jan. 29, 1942; minimum, 375 second-feet Feb. 14, 1935; minimum daily, 422 second-feet Feb. 14, 1935; maximum elevation, 4S2..37 feet July 19, 1943. Discharge of about 300,000 second-feet (based on determination at Lees Ferry gaging station) occurred about July 10, 1884. Discharge in excess of 400,000 second-feet (estimated) probably occurred within the period 1857-68 and most likely in 1862. Remarks.- Records good. Discharge computed by using fall as determinedly auxiliary water- stale recorder as a factor. Diversions above station for irrigation and industrial uses. Flow regulated by Boulder Dam; no regulation between Boulder Dam and this station. Elevations given are to datum of 1929.

Elevation, 1» feet, water year October 1943 to September 1944 Day Oct. NOT. Deo. Jan. Feb. Mar. Apr. "ay June July Aug. Sept.

1 451.07 450.73 449.82 449.62 449.90 450.41 450.77 449.92 449.99 451.40 451.93 451.44 2 451.24 450.29 450.17 449.61 449.90 450.59 450.62 449.27 450.36 451.50 451.54 461.47 3 451.26 450.29 450.B7 449.29 450.03 450.87 450.76 44S.95 450.52 451.64 451.57 451.49 4 451.15 450.59 450.67 449.00 450.12 451.13 450.22 449.20 450.42 451.58 451.80 451.46 5 450.74 450.64 450.73 449.24 450.13 451.09 450.05 449.55 450.38 451.36 452.05 451.18 6 450.69 450.75 450.66 449.50 450.16 450.64 450.53 449.67 450.06 451.36 452.17 450.69 7 450.97 450.96 450.52 449.61 449.97 450.21 451.03 449.57 449.81 451.48 452.06 450.46 8 451.26 450.95 450.57 449.69 449.60 449.94 451.04 449.26 450.08 451.65 451.72 450.59 9 451.42 450.66 450.74 449.66 449.66 450.05 450.73 448.69 450.22 451.75 451.25 450,66 10 451.58 450.62 450.86 449.70 449.88 450.16 450.44 448.47 450.31 451.77 451.23 450.69 11 451.50 450.73 450.90 449.33 450.14 450.09 449.95 448.94 450.50 451.52 451.42 450.65 12 451.06 450.91 450.97 449.44 450.08 449.89 449.62 449.41 450.77 451.22 451.66 450.45 13 450.96 450.99 450.91 449.67 450.03 449.88 449/66 449.49 450.73 451.28 451.82 450.10 14 451.17 451.07 450.62 449.62 450.14 449.59 449.93 449.36 450.61 451.52 451.86 450.20 IS 451.47 451.08 450.49 449.80 449.93 449.94 450.05 449.26 450.89 451.67 451.57 450.40

16 451.59 450.84 450.63 449.32 449.99 450.76 449.97 448.65 451.17 451.82 451.10 450 .-52 17 451.57 450.77 450.72 449.75' 450.18 451.24 449 .91 448.42 451.40 451.90 451.15 450.65 18 451.40 450.92 450.54 449.46 450.36 451.16 449.43 448. S7 451.58 451.62 451.46 450.59 19 451.14 451.04 450.32 449.53 450.46 451.00 449.42 449.25 451.80 451.26 451.72 450.26 20 451.12 451.03 450.02 449.74 450.49 450.60 449.88 449.29 451.70 451.35 451.88 449.87 21 451.28 450.99 449.62 449.79 450.45 450.10 450.34 449.20 451.50 451.54 451.94 450.10 22 451.39 450.84 449.53 449.88 450.24 450.13 450.41 449.17 451.60 451.65 451.69 450.40 23 451.40 450.50 449.61 450.01 450.13 450.49 450.36 448.68 451.89 451.74 451.30 450.62 24 451.38 450.43 449.55 450.05 450.38 450.75 450.15 448.50 451.98 451.76 451.30 450.62 25 451.25 450.61 449.55 449.92 450.64 450.88 449.40 449.39 452 . 00 451.57 451.44 450.72 26 450.33 450.63 449.23 449.94 450.76 450.84 449.19 449.99 452.02 451.27 451.56 450.32 27 450.72 450.44 448.79 450.08 450.87 450.73 449.53 450.25 451. S2 451.38 451.67 450.04 28 450.89 450.32 448.52 450.14 450.80 450.14 449.92 450.44 451.45 451.76 451.70 450.15 29 451.05 450.27 448.60 450.25 450.51 450.00 450.09 450.50 451.33 451.94 451.46 450.27 30 451.05 449.89 449.19 450.22 - 450.33 450.06 450.05 451.32 452.09 451.10 450.22 31 450.98 - 449.49 450.11 - 450.67 - 449.74 452.13 451.25 670650 O - 45 - 3 COLORADO RIVER MAIN STEM

Discharge, In second-feet, of Colorado River near Topock, Ariz., water year October 1943 to September 1944

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

i 18,500 18,900 17,400 21,300 21,100 20,500 21.600 19,100 19,100 16,900 IB, 000 19,700 Z 18,600 16,500 19,300 20,500 21,000 21,800 21 ,500 16,800 20,200 17,400 Ifi, 200 19,700 3 18,800 17,500 20,700 17,900 21,900 23,100 P,C ,800 16,200 20,700 17,700 17, 500 19,500 4 17,900 18,800 21,500 15,900 22,100 23,600 1£ ,100 17,600 19,400 16,100 18, 600 19,200 5 16,300 19,500 21,100 17,900 22,100 23,500 18,900 18,900 17,900 14,800 19, 300 17,300 6 17,100 19,900 20,200 19,600 21,700 21,900 21,800 19,200 15,800 15,300 19, 500 15,000 7 18,400 20,400 18,700 19,700 20,500 IS, 500 2? ,100 18,700 15,300 16,300 IB, 800 - 15,600 8 19,100 20,000 20,000 20,000 17,900 17,900 2£ ,000 17,700 17,200 17,400 16, 400 17,800 9 19,200 17,900 £0,000 20,200 18,500 18,900 2C ,500 15,800 17,800 17,600 15, 400 18,600 10 19,100 18,100 20,600 20,100 20,100 19,300 19,300 15,600 18,100 17,200 17,200 19,000 11 18,500 19,000 21,000 18,000 20,400 18,300 17,100 17,900 18,500 15,500 19, 000 18,800 12 16,400 19,200 21,000 18,400 20,600 17,400 16 ,400 19,500 18,200 14,600 20, 100 17,800 13 17,100 19,400 20,800 19,900 20,500 17,000 If ,200 19,700 16,300 16,000 m, 800 16,500 14 18,600 19,700 19,000 20,100 20,400 16,600 19 ,200 19,400 15,600 17,600 20, 500 17,900 15 19,700 19,500 19,000 20,500 19,500 18,800 19,400 18,800 17,100 18,100 17,900 19,100 16 19,800 18,300 19,800 20,500 20,200 22,200 19 ,400 16,800 18,500 18,300 15, 800 19,700 17 19,300 18,600 20,400 20,200 21,100 23,300 IF ,900 16,700 18,700 18,100 17, 500 19,600 18 18,700 19,300 20,900 19,000 21,700 22,600 16 ,400 18,100 18,700 16,300 19, 500 19,500 19 17,500 19,700 21,600 19,600 22,600 21,300 n ,300 19,300 19,200 15,200 20, 400 17,700 20 18,600 19,800 21,900 20,400 22,700 19,900 19,600 19,500 17,400 17,200 21, 200 16,100 21 19,700 19,800 19,900 20,900 22,700 18,000 21,000 19,400 16,300 18,200 fit , 100 17,900 22 30,000 19 , 100 20,100 21,500 21,800 18,900 20 ,600 18,900 18 , 100 18,600 18, 900 19,500 23 30,100 18,000 21,000 21,800 21,800 20,900 20 ,000 17,100 18,900 18,500 16, 300 20,400 24 20,000 18,800 31,500 21,800 22,900 21,700 If. .900 17,200 19,600 18,300 17, 500 20,600 25 19,000 19 , 700 21,400 20,800 23,300 21,700 15,800 20,000 19,600 16,600 19, 100 19,900 26 17,300 30,300 20,000 21,100 23,500 21,500 16,200 21,600 19,000 14,600 20, 000 17,900 18,000 19,000 16,600 21,900 24,000 20,700 If ,000 22,000 17,100 16,300 20, 400 16,700 28 19,300 18,500 14,700 22,700 23,700 18,100 19 ,300 22,100 15,700 18,300 20, F>00 17,600 29 20,000 18,600 16,700 22 , 700 20,900 18,900 19 ,800 21,700 16,000 19,000 18, 400 18,400 30 20,100 16,900 19,200 23,100 20,800 19 ,600 19,000 16,300 19,400 16,900 18,500 19,900 - 20,600 22,600 - 21,800 - 17,600 - 19,500 18, 400 - Second Runoff in Month foot-days Maximum Minimum Mean acre-feet 20,100 December...... 616,200 21,600 14,700 19,880 1,222,000 Calendar year 1943 ...... 6,129,200 21,600 12,100 16,790 12,160,000

SO 300 April ...... May...... July...... 530,900 19,500 14,600 576,800 21,200 15,400 September ...... 551,500 20,600 15,000 18,380 1,094,000 Water year 1943-44 ...... 6,998,600 24,000 14,600 19,120 13,880,000 Time baala! Mountain war time through Dec. 31, 1943; mountain atandard time thereafter . To con- COLORADO RIVER MAIN STEM 27

Havasu Lake near Parker Dam, Arlz.-Calif.

Location.- Water-stage recorder, lat. 34°19', long. 114°09', In SWi sec. 28, T. 3 II., R. 27 E. San Bernardlno meridian, at Intake pumping plant of Metropolitan Water District of Southern California, 1.8 miles upstream from Parker Dam on Colorado River, which Is 156 miles downstream from Boulder Dam. Datum of gage Is 400.54 feet above mean sea level, datum of 1929, or 400.83 feet above mean sea level, datum of Metropolitan Water District of Southern California. Gage readings have been reduced to elevations above mean sea level, datum of 1929. Drainage area.- 178,800 square miles at Parker Dam. Records available.- July 1938 to September 1944. Extremes.- Maximum contents during year, 689,900 acre-feet Aug. 6 (elevation, 450.62 feet); minimum, 544,000 acre-feet May 18 (elevation, 444.09 feet). 1938-44: Maximum contents, 693,000 acre-feet (by temporary use of flashboards) Apr. 18, 1943 (elevation, 450.76 feet); minimum, 71,400 acre-feet June 25, 1942 (elevation, 412.09 feet). Remarks.- Lake Is formed by concrete-arch dam: dam completed and storage began July 1, 1938. Usable capacity, 688,000 acre-feet (neglecting slope in lake), between ele­ vations 400.54 feet (sill of regulating gates) and 450.54 feet (top of regulating gates) above mean sea level. Dead storage, 28,600 acre-feet below elevation 400.54 feet. About 0.07 foot fall Indicated between dam and gage under normal operating conditions. Draw-down below elevation 440.54 feet (contents, 472,000 acre-feet) not legally permissible except by consent of Metropolitan Water District of Southern California or In an emergency affecting safety of dam. Lake Is used for flood control, power development, re-regulation of river for Irrigation demand, and as a basin from which water Is pumped by Iletropolitan Water District of Southern California to Colorado River aqueduct (see p. 29). Figures given herein represent usable contents.

Elevation at 12 p. In feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Bay June July Aug. Sept.

1 448.84 447.67 446 . 59 445.94 445.85 446.77 447.25 446.26 447.31 449.97 450.42 449.64 2 448.74 447.48 446.76 446.07 445.80 446.81 447.46 446 .-10 447.65 450.03 450.20 449.78 3 44S.70 447.46 446.90 446.02 445.83 447.04 447.50 445.75 448.06 450.26 450.19 449.80 4 448.66 447.58 447.10 445.78 445.90 447.39 447. 2S 445.61 448.39 450.35 450.40 449.S5 5 446.57 447.69 447.32 445.68 446.03 447.18 447.17 445.57 448.54 450.27 450.58 449.67 6 448.51 447.65 447.50 445.74 445.94 447.31 447.24 445.58 448.40 450.23 450.59 449.25 7 448.54 447.74 447.37 445.90 445.95 447.17 447.46 445.48 448.20 450.23 450.44 448. S6 8 448.60 447.79 447.40 445.79 446.03 447.08 447.60 445.37 448. OS 450.28 450.13 448.68 9 448.88 447.78 447.46 445.78 445.83 447.08 447.63 445.03 448.21 450.34 449.76 448.60 10 449.11 447 . 78 447.37 445.90 445.90 447.11 447.58 444.68 448.37 450.40 449.69 448.60 11 449. 12 447.81 447. 3S 445.82 445.91 447.11 447.26 444.56 448.78 450.29 449. S2 448.63 12 448.94 447.98 447. 43 445.77 445.96 447.03 446.93 444.60 449.09 450.04 449.86 446.49 13 448. SO 448.00 447.46 445. S6 445.82 446.96 446.77 444.68 449.17 449.97 450.03 448.20 14 448. SO 448.00 447.26 445.92 445.84 446.96 446.79 444.67 449.14 450.03 450.13 448.08 15 448.84 448.03 447.02 445.90 445.84 447.20 446.89 444.62 449.32 450.20 449.97 448.12 16 448.90 447.90 446. S9 445.90 445.84 447.37 446.83 444.50 449.66 450.5 449.73 448.24 17 448.88 447.78 446.69 445.88 445.94 447.55 446. 7S 444.20 449.88 450.48 449.71 448.24 18 448.82 447.76 446.48 445.73 446.09 447.66 446 . 53 444.16 450.14 450.22 449.86 448.33 19 448.54 447.77 446.40 445.76 446.04 447.60 446.28 444.35 450.37 449.93 450.05 448.24 20 448.38 447.70 446.22 445.80 446.04 447.46 446. 3S 444.54 450.32 449.80 450.22 448.03 21 448.36 447.67 445.96 445.79 445.91 447.24 446 . 50 444.72 450.27 449.86 450.31 448.02 22 448.46 447.50 445.81 445. S7 445.77 447.06 446.65 444. SO 450.22 450.00 450.20 448.11 23 448.50 447.24 445.79 445.94 445.89 447.01 446.75 444. SI 450.34 450.17 449.90 446.26 24 448.58 447.05 445.74 446.09 446.12 447.16 446.76 444.75 450.40 450.26 449.81 44S.44 25 448.52 447.21 445.97 446.09 446.54 447.60 446.44 444. 9S 450.39 450.31 449.85 448.42 26 448.19 447.16 445.95 445.99 446.81 447.64 446 . 15 445.42 450.57 450.16 ^449. 91 448.25 27 447.94 447. 02 445.65 446 . 03 446'. 6 7 447.66 446 . 09 445.91 450.47 450.17 449.99 448.15 28 447.86 446.88 445.38 446.07 446.70 447.34 446 . 10 446.48 450.21 450.34 450.04 448.01 29 447. S6 446.72 445.28 446.12 446.85 447.08 446.19 446.89 450.08 450.50 449.88 447.94 30 447.86 446.58 445.45 446.05 _ 447.02 446.2"? 447.09 450.01 450.57 449.66 447.90 31 447.86 - 445.75 446.03 - 447.12 - 447.16 - 450.57 449.53 - Mote.- Elevations are mean sea level, datum of 1929. 28 COLORADO RIVER MIUN STEM

Usable contents, at 12 p.m. , In thousands of acre-feet, of near Parker Dam, Aria.-Calif.

Day Oct. Nov. Dec. Jan. Feb. Mar. tpr. Hay June July Aug. Sept.

1 648.2 621.5 597.6 583.3 581.3 601.6 612.1 590,3 613 .'4 674.4 685.1 666.8 2 646.1 617.2 601.3 586.2 580.2 602.4 616.7 586.8 621.0 675.8 679.8 668.6 3 645.0 616.7 604.4 585.1 580.9 607.5 617.6 579.1 630.5 681.3 679.6 670.5 4 644.3 619.4 608.8 579.8 582.4 613.0 612.8 576.0 638.0 683.4 684.6 671.6 5 642.2 622.0 613.7 577.6 585.3 610.6 610.4 575.2 641.5 681.5 689.0 667.5 8 640.8 621.0 617.6 578.9 583.3 613.4 611.9 575.4 638.3 680.6 689.2 657 i8 7 641.5 623.1 614.8 582.4 583.5 610 .-4 616.7 573.2 633.7 680.6 685.6 648.9 8 642.9 624.2 615.4 580.0 585.3 608.4 619.9 570.9 630.9 681.8 678.2 644.7 9 649.3 624.0 616.7 579.8 580.9 608.2 620.6 563.8 633.9 683.2 669.6 642.9 10 654.6 624.0 614.8 582.4 582.4 609.0 619.4 556.4 637.6 684.6 668.0 642.9 11 654.8 624.7 615.0 580.7 582.6 609.0 612.3 553.9 647.0 682.0 670.9 643.6 12 650.5 628.6 616.1 579.6 583.7 607.3 605.1 554.8 654.2 676.0 671.9 640.4 13 647.5 629.1 616.5 581.6 580.7 605.7 601.6 556.4 656.0 674.4 675.8 633.7 14 647.2 629.1 612.3 582.9 581.1 605.7 602.0 556.2 655.3 675.8 678.2 630.9 15 648.2 629.8 607.1 582.4 581.1 611.0 604.2 555.2 659.4 679.8 674.4 631.8 16 649.6 626.8 604.2 582.4 581.1 614.8 602.9 552.7 667.3 686.8 668.9 634.6 17 649.1 624.0 599.8 582.0 583.3 618.7 601.8 546.4 672.3 686.6 668.4 654.6 18 647.9 623.6 595.2 578.7 586.6 621.3 596.3 545.5 678.4 680.3 671.9 636.7 19 641.5 623.8 593.4 579.3 585.5 619.9 590.8 549.5 683.9 673.6 676.2 634.6 20 637.6 622.2 589.5 580.2 585.5 616.7 593.0 553.5 682.7 670.5 680.3 629.8 21 637.4 621.5 584.2 580.0 582.6 611.9 595.6 557.3 681.5 671.9 682.5 629.5 22 639.4 617.6 580.4 581.8 579.6 607.9 598.9 559.0 680.3 675.1 679.8 631.6 23 640.6 611.9 680.0 583.3 582.2 606.8 601.1 559.2 683.2 679.1 672.8 636.1 24 642.2 607.7 578.9 686.6 587.3 610.1 601.3 557.9 684.6 681.3 670.7 639.2 25 641.0 611.2 684.0 586.6 596.5 619.9 594.3 562.7 684.4 682.5 671.6 638.7 26 633.4 610.6 583.5 584.4 602.4 620.8 587.9 572.0 688.7 678.9 673.0 634.8 27 627.7 607.1 576.9 585.3 599.4 621.3 586.6 582.6 685.6 679.1 674.8 632.5 28 625.9 604.0 571.1 586.2 600.0 614.1 586.8 595.2 680.1 683.2 676.0 629.3 29 625.9 600.5 569.0 587.3 603.3 608.4 588.8 604.2 677.0 687.0 672.3 627.7 30 625.9 597.4 572.6 585.7 _ 607.1 590.6 608.6 675.3 688.7 567.3 626.8 31 625.9 - 579.1 585.3 - 609.3 - 610.1 - 688.7 664.3 - Note.- Dead storage below sill of outlet gates Is 28,600 acre-feet.

Monthly eleTatlon and contents, water year October 1943 to September 1944 Change In contents Date EleTatlon Contents during month (feet)t (acre-feet) (acre-feet)

Calendar year 1943... - - +85,000

446 27

447 90 Water year 1943-44... - - -17,000 t Elevation at 12 p.m. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter.To convert war time to standard time, subtract 1 hour. COLORADO RIVER MAIN STEM 29

Colorado River below Parker Dam, Ariz.-Calif.

Location.- Water-stage recorder, lat. 34°15 1 3011 , long. 114°09'10", In NEiSWi sec. 16, T. 2 N., R. 27 E. San Bernardlno meridian, 4.1 miles downstream from Parker Dam, 10.4 miles upstream from Headgate .Rock Dam, and 11 miles northeast of Parker, Arlz. Datum of gage Is 346.16 feet above mean sea level, datum of 1929. Drainage area.- 178,800 square miles. Records available.- February to September 1934 (gage heights and fragmentary discharge records), October 1934 to September 1944. Records of diversion by Colorado River .aqueduct, January 1939 to September 1944. Records ef monthly discharge prior-to October 1938 republished in Water Supply Paper 918. ' Average discharge.- 10 years (1934-44), 16,480 second-feet (adjusted to include storage in Lake neaa and Havasu Lake). Extremes (regulated).- rfeximum discharge during year, 28,500 second-feet Feb. 27 (gage height, 24.48 feet); minimum, 11,900 second-feet Oct. 1. 1935-44: Ifeximum discharge, 43,400 second-feet Feb. 8, 1937; no flow at Parker Dam parts of several days in 1942 when gates in dam were closed; minimum daily, 1,440 second-feet Feb. 15, 1935. An unregulated discharge of probably less than 1,350 second-feet occurred-Aug. 18. 1934 (lowest unregulated discharge since 1917 and probably since a much earlier date). Remarks.- Records excellent. Many diversions above station. Flow regulated by Boulder and Parker Dams (see pp. 22 , 27 ). Diversion by Colorado River aqueduct, 1.8 miles upstream from Parker Dam, is water pumped from Havasu Lake less water spilled from Qgne Reservoir and returned to Havasu Lake. No return surface flow from Gene and Copper Basin Reservoirs during year. Some water returned to river both above and'below station by percolation from both reservoirs. Cooperation.- Record of diversion by Colorado River aqueduct furnished by Ifetropolitan Water District of Southern California. Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Hcv. Dec. Jan. Feb. liar. Apr. Hay June July Aug. Sept. 1 15,700 20.SOO 16,800 19,400 23,200 22,400 20,600 19,300 16,800 16,700 20,000 18,600 2 19,300 13,100 16,500 19,100 21,600 22,300 19,300 19,100 17,000 16,200 18,700 18,700 .3 19,300 17,000 18,300 19,000 21,600 22,400 20,500 18,700 16,600 15,400 17,600 18,700 4 19,100 17,200 19,000 1S,300 21,700 23,000 20,900 19,200 16,200 14,900 16,700 18,600 5 17,000 17,600 19,300 18,400 21,300 26,200 20,200 19,000 16,300 15,100 17,800 18,800 6 17,200 19,800 18,600 18,700 22,400 22,700 20,200 18,900 16,900 15,000 19,300 18,600 7 17,500 19,400 20,000 17,800 21,700 22,400 20,200 16,900 16,700 15,000 20,300 18,800 8 17,700 19,400 19 ,500 21,000 18,300 19,600 20,200 18,900 16,700 16,200 19,500 19,300 9 16,700 17,900 18,900 20,400 19,400 19,600 20,200 18,800 16,600 16,500 18,500 19,400 10 16,400 18,000 21,500 19,400 19,600 19,700 20,200 1S.SOO 16,500 16,400 18,000 19,100 11 18,800 19,200 20,600 18,600 19,700 19,600 20,100 18,800 14,400 16,500 17,400 19,000 12 18,200 17,200 20,500 19,200 20,900 19,300 20,100 18,800 14,500' 16,500 18,600 18,900 13 18,300 19,400 20,500 19,100 20,600 18,800 19,500 18,700 14,700 16,400 19,500 18,900 14 18,400 19,700 20,800 19,300 19,200 19,000 18,900 18,600 14,900 16,600 18,800 18,300 15 19,100 19,300 21,600 21,000 20,800 18,400 19 ,000 18,600 15,100 16,700 19,300 18,600 16 19,100 19,700 21,300 20,300 19,000 20,300 19,000 18,800 15,000 16,200 17,800 18,200 17 19,200 19,800 22,500 19,600 19,800 23,300 19,000 18,SOO 16,100 IS, 000 17,300 18,800 18 19,100 19,900 23,700 20,600 19,900 23,300 19,100 18,500 15,300 19,000 17,200 18,800 19 20,100 19,700 22,100 18,800 22,900 22,800 19,100 17,100 15,800 18,200 18,000 18,500 20 20,400 20,700 23,300 19,700 22,300 22,300 19,100 17,500 16,700 18,300 18,900 17,800 21 19,600 20,700 22,600 20,500 22,700 21,800 19,100 17,000 16,600 18,000 19,800 17,800 22 19,300 21,000 21,700 20,700 22,700 20,000 19,100 17,200 17,400 17,SOO 19,600 18,200 23 19,600 21,300 20,400 20,000 20,800 21,500 19,200 17,200' 17,500 17,500 18,900 18,600 24 19,400 20,600 22,300 20,400 20,900 20,900 19,200 17,200 18,400 17,900 17,900 17,800 25 19,500 18,400 18,700 21,000 21,700 18,100 19,100 17,100 80,000 16,200 18,200 20,700 28 20,700 19,000 21,200 21,900 22,000 19,700 19,100 17,200 17,200 1,5,900 18,900 19,600 27 20,700 20,300 18,600 21,800 25,900 21,200 19,200 17,200 18,100 15,900 19,200 17,100 28 19,900 19,600 17,200 22,600 22,700 20,700 19,100 17,000 18,200 16,800 T.9,600 18,800 29 19,900 19,600 17,200 22,500 21,400 21,200 19,000 17,300 16,600 17,400 19,600 18,900 30 19 ,'800 19,000 17,200 23,700 21,200 19,100 17,300 16,600 18,500 19,200 19,700 31 19,600 - 17,400 22,900 - 20,400 17,100 19,900 18,800 -

Second- Diversion by Colo­ Month Maximum Minimum Mean Runoff In rado River aqueduct foct-days acre-feet (acre-feet) October ...... 584,600 20,700 15,700 18,860 1,160,000 1,510 November ...... 579,300 21,300 17,000 19,310 1 149 000 2,050 December ...... 620,500 23,700 16,500 20,020 1 '23l!oOO 0 Calendar year 1943 ...... 6,089,300 23,700 9,670 16,680 12,080,000 34,630 January ...... 625 , 700 23 700 17,800 20,180 1,241,000 2 210 February ...... 616,700 25 f 9 00 18,300 21,270 1 ,223,000 4^890 March ...... 654,100 26,200 18,100 21,100 1,297,000 9,760 April ...... 586,600 20,900 18,900 19,550 1,164,000 0 May ...... 562,600 19 y 300 17,000 18,150 1,116,000 1,280 June ...... 495,400 20,000 14,400 16,510 982,600 2,030 July ...... 521,600 19 900 14,900 16,830 1,035,000 1,160 August ...... 578,900 20*300 16,700 18,670 1,148,000 7,310 September ...... 561,600 20,700 17,100 18,720 1,114,000 5,440 Water year 1943-44 6,987,600 26,200 14,400 19,090 13,860,000 37,340 Tims basis; Mountain war time through Dec. 31, 1943; mountain standard time thereafter, vert war time tc standard time, subtract 1 hour. 30 COLORADO RIVER MMN STEM

DIVERSIONS BETWEEN PARKER DAM AND IMPERIAL DAM Diversion for Colorado River Indian Reservation, near Parker, Ariz. Location.- Diversion for Colorado River Indian Reservation Is made at Arizona end of Head- gate Rock Dam, lat. 34°10'05", long. 114°16'30", In IJEi sec. 31, T. 10 II., R. 19 W. Glla and Salt River meridian, on Colorado River Indian Reservation, it miles northeast of Parker, and 144 miles downstream from Parker Dam. The diversion is measured below wasteway, at crossing of Arizona State Highway 72, 1-g miles downstream from intake. Records available.- January 1915 to December 1938 (calendar year discharge), January 1937 to September 1944 (monthly discharge). Records prior to October 1938 have been re- published in Water-Supply Paper 918. Remarks.- Figures given herein show water available to project. Discharge computed from rated gate openings in canal below wasteway; rating checked occasionally by current- meter measurements. Water is used for irrigation on Colorado River Indian Reservation on east side of Colorado River between Parker and Ehrenberg. About 10 percent of total diversion was used for stock water and growth of stock feed in bottom lands at lower end of cultivated area of project. No surface water was returned to Colorado River. Cooperation.- Records furnished by Office of Indian Affairs.

Monthly diversion, water year October 1943 to September 1944 Second-feet Month Acre-feet Maximum Minimum Mean 160 0 95.5 5,370 205 0 69.2 4,120 110 0 64.5 3,960 275 0 109 79,130 128 0 47.4 2,910 140 0 51.9 2,990 150 12 93.5 5,750 200 86 163 9,700 Ifey...... 200 70 173 10,630 285 150 218 12,980 332 183 275 16,920 330 216 280 17,210 297 105 244 14,500 352 0 148 107,500

Palo Verde Canal near Blythe, Calif. Location.- Water-stage recorder, lat. 33°43'55", long. 114030'40", in NEi sec. 19, T. 5 S., R. 24 E. San Bernardino meridian, at intake structure on Colorado River, 9-J niles northeast of Blythe and 43 miles below Headgate Rock Dam. Records available.- January 1922 to December 1923, January 1925 to September 1944. Remarks.- Figures given herein represent flow diverted from Colorado River and are com- puted on basis of head on gate openings and occasional current-meter measurements. About 10 percent of total diversion is returned to river through several wasteways at lower end of project. Canal diverts water from right bank of Colorado River for irrigation of lands in Palo v'erde Irrigation District In vicinity of Blythe and Ripley, Riverside County. Measurements of the drainage cana,L for the project near the lower end in iJEi sec. 11, T'. 9 3., R. 21 E., 1 mile south of Palo Verde, showed 193 second-feet June 6, 1941, and 171 second-feet Aug. 19, 1944. Cooperation.- Records except measurements of drainage canal furnished by Palo Verde Irri- gatlon District.

Monthly diversion, water year October 1943 to September 1944 Sec ond-feet Maximum Minimum Mean

296 24 930 32*S'50

July...... 532

Time basis; Pacific war time. To convert war time to standard time, aub- tract 1 hour. COLORADO RIVER MAIN STEH 31

Colorado River at Imperial Dam, Ariz.-Calif.

Imperial Dam on Colorado River is located in lat. 32°53'0011 , long. 114°27'50". The California end is In Wi sec. 9, T. 15 S., R. 24 E. San Bernardino meridian. The Arizona end is in SWiNWi sec- 30 T. 6 S., R. 21 W. Gila and Salt River meridian. The dam is 15 miles northeast of Yuma, 5 miles upstream from Laguna Dam, 90 miles downstream from intake of Palo Verde Canal, and 147 miles downstream from Parker Dam. At the California end of the dam water is diverted by Ail-American Canal for use in Arizona and California. At the Arizona end, water is diverted by Gila Gravity Main Canal for use in Arizona. Water was first diverted by All-Amerlcan Canal in October 1958 and by Gila Gravity Main Canal in August 1943. No records of flow of Colorado River have been collected at site of dam either before or after its construction. The discharge figures published herewith for period October 1942 to September 1944 are the sum of monthly records of discharge obtained at gaging stations on Colorado River at Yuma, Ail-American Canal near Imperial Dam, and Gila Gravity Main Canal at Imperial Dam, plus records of diversions by Yuma Canal and North Gila Valley Canal at Laguna Dam furnished by Bureau of Reclamation. The Gila River did not discharge any water during the period. The combination of recorde shows flow of Colorado River at Imperial Dam and above all diversions in vicinity of Yuma. Records of daily and monthly discharge were obtained for July 1934 to September 1942 at a gaging station 144 miles upstream, and published as Colorado River near Plcacho, Calif. Estimates of annual discharge for the years 1903-34, derived from records of Colorado River at Yuma, Gila River near Dome, and diversions at Laguna Dam, were published in Water-Supply Paper 91S.

Runoff, In acre-feet, water years 1942-45 and 1945-44 Month 1942-43 1945-44

1,176,000 1,222,000 *14,710,000 11,550,000

920,500 816,600 1,041,000

« Computed using record for Colorado River near Pieacho January to September 1942. Time basis; Pacific war time. To convert war time to standard time, subtract 1 hour. 32 COLORADO RIVER MAIN STEM

Colorado River at Yuma, Ariz.

Location.- Water-stage recorder, lat. 32043'45", long. .114037'15", in WWiNEi sec. 35,. T. 16 S., R. 22 E. San Bernardino meridian, 1,800 feet downstream from highway bridge at Yuma, 4 miles downstream from Gfila River, 19 miles downstream from Imperial Dam, and 7 miles upstream from boundary between California and Mexico. Datum of gage is 102.32 feet above mean sea level, Yuma project datum, or 102.86 feet, datum of 1929. Drainage area.- 242,900 square miles, including all closed basins entirely within drainage boundary. Records available.- January 1878 to December 1901 (gage height, only), January 1902 to September 1944. Records of monthly discharge prior to October 1938 nave been republished, with some revisions, in Water-Supply Paper 918. Extremes.- Maximum discharge during year, 21,200 second-feet Feb. 24 (gage height, 18.89 feet); minimum, 3,950 second-feet July 30 (gage height, 11.42 feet). 1902-44: Maximum discharge, 250,000 second-feet Jan. 22, 1916 (gage height, 34.0. feet); minimum dally, 18 second-feet Aug. 25-27, 1934, caused by diversion at Laguna Dam; minimum gage height, 11.22 feet Oct. 13, 1942. Remarks.- Records excellent. Many diversions from Colorado River and tributaries. Principal diversions below Parker Dam are Colorado River Indian Reservation Canal, Palo Verde Canal, All-American Canal, Gila Gravity Main Canal,- Yuma Canal, and North Glla Valley Canal. Plow of Colorado River regulated by Boulder, Parker, Headgate Rock, and to a small extent by Imperial and Laguna Dams. No regulation on Gfila River below Gflllespie Dam. Records of water analyses for the water year 1944 are given In Water-Supply Paper 1022.

Discharge, in secoad-fee't, water year October 1943 to Septenber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 11,500 12,900 14,000 13,700 17,400 19,300 14,600 12,000 9,240 9,150 6,340 9,290 2 11,000 12,700 13,600 13,500 17,100 16,200 13,200 11,500 9,280 8,600 6,150 9,230 3 9,330 12,800 11,900 15 ,300 17,600 18,500 13,400 12,300 9,300 6,390 7,240 8,960 4 9,700 12,000 11,400 15,400 16,600 18,700 12,600 11,600 9,540 6,550 7,560 9,130 5 11,000 11,400 12,600 15 ,500 16,400 18,600 12,600 11,500 9,270 S,230 6,950 9,100 6 10,700 11,600 13,400 15,000 15,800 18,400 13,000 11,500 8,990 7,340 6,130 8,680 7 9,980 10,800 15,600 14,400 15,900 19,500 12,700 12,000 ' S,600 6,870 5,790 8,760 8 9,890 1S,SOO 14,800 14,500 16,700 18,600 12,800 11,600 3,430 7,190 5,900 9,010 9 10,800 13,400 14,900 14,000 16,600 17,100 18,900 11,400 6,260 6,790 6,890 9,080 10 10,800 IS, 400 16,000 15,600 15,000 14,800 12,600 10,400 8,540 6,790 7,930 9,000 11 10,300 12,200 15,700 15,600 14,000 14,100 12,000 10,900 S,820 7,690 7,770 9,150 12 9,360 11,500 17,500 14,700 14,400 13,600 11,700 11,000 S,700 7,710 7,250 10,200 13 9,640 12,300 17,700 14,100 14,600 13,000 12,000 11,900 7,570 8,390 6,970 11,100 14 10,800 11,600 16,700 14,000 14,800 12,500 12,500 11,600 6,650 8,180 6,810 12,200 15 10,600 12,400 17,000 13,700 14,700 11,700 13,400 11,500 6,700 8,630 7,400 11,900 16 10,500 13,100 16,700 13,900 13,200 12,000 11,900 11,100 6,670 8,010 6,050 14,000 n 11,400 13,000 17,100 14,600 14,200 11,600 11,300 11,200 7,320 8,240 7,780 12,100 18 11,100 13,200 17,300 14,500 12,700 12,600 11,800 11,200 7,340 8,320 7,870 11,800 19 11,700 13,600 16,400 14,000 .13,100 14,900 11,400 11,300 7,570 7,790 8,380 11,500 20 11,500 14,600 16,700 14,400 13,100 16,300 11,400 11,500 7,900 7,300 6,850 11,900 21 12,000 14,200 IS, 400 13,800 15,700 16,100 11,60* 11,000 7,600 6,490 7,380 11,700 22 12,400 13,500 19,100 14,400 17,000 14,700 12,300 10,500 6,010 6,080 7,710 11,200 23 12,100 15,200 19,200 15,400 18,100 13,600 12,200 9,660 8,550 5,690 8,470 10,400 24 11,600 15,000 18,600 14,800 20,500 13v400 11,700 9,870 8,730 5,630 9,380 10,700 25 11,700 15,600 16,000 14,200 19,100 14,200 11,700 9,940 8,830 5,660 9,520 10,600 26 11,800 15,000 16,900 14,700 16,400 13,600 11,600 10,000 9,270 5,490 8,95JD 10,000 27 11,900 13,600 16,500 15,600 17,900 11,400 11,800 10,000 10,500 5,620 8,260 10,800 28 12,800 13,600 17,300 15,700 18,600 12,000 11,600 10,100 9,590 4,740 6,510 11,700 29 13,100 13,900 15,800 16,500 19,600 13,200 12,500 9,920 8,960 4,090 8,490 10,900 30 12,900 14,000 14,300 16,900 _ 13,300 12,200 9,630 9,130 4,100 8,650 10,600 31 13,200 - 13,600 16,600 - 13,600 - 9,910 - 4,910 9,130 Seoond- Runoff in Month foot-days Maximun Minimum Mean acre-feet

October...... 346,700 13 9,330 11,180 6S7,700 November...... :...... 394,100 15^600 10,800 13,140 781,700 December...... 500,700 19,200 11,400 16,150 993,100 Calendar year 1943 ...... 3,666,140 19,200 3,610 10,040 7,272,000 January...... 459,200 16,900 13,500 14,810 910,800 February...... 468,800 20,500 12,700 16,170 929,900 March...... 463,300 19 ,500 11,400 14,950 918,900 April ...... 368,900 14,600 11,300 12,300 731,700 May...... 340,130 12,300 9,630 10,970 674,600 June ...... 254,060 10,500 6,650 8,469 503,900 July...... 216,680 9,150 4,090 6,990 429,800 August ...... 235,460 9,520 5,340 7,595 467,000 September...... 314,690 14,000 6,680 10,490 624,200 Water year 1943-44 ...... 4,362,720 20,500 4,090 11,920 8,653,000 basis; Mountain war time through Dee. 31, 1943; mountain standard time thereafter, war time to standard time, subtract 1 hour. COLORADO RIVER MAIN STEM 33

Colorado River at Rockwood gate, Calif.

Rockwood gate Is on the right bank of Colorado River, lat. 32°44'0011 , long. 114°42'40*, SEiSVii sec. 25, T. 16 S.. R. 21 E. San Bernardlno meridian, 1 mile upstream from International boundary and 5 miles west of Yuma, Arlz. It Is the Intake structure for diverting water from Colorado River to Alamo Canal, which also receives water from All-Amerlcan Canal through Pilot Knob wasteway. The monthly quantities of water available at Rockwood gate, Including amounts pass- Ing through Pilot Knob wasteway, for the period October 1938 to September 1944, are the sum of records obtained at gaging stations on Colorado River at Yuma, Yuma Ifeln Canal wasteway, and Pilot Knob wasteway near Pilot Knob, plus records of California Drainage Canal at Yuma furnished by Bureau of Reclamation.

Monthly runoff In acre-feet, water years 1938-39 to 1943-44 Month 1958-39 1939-40 1940-41 1941-42 1942-43 1943-44

Calendar year..... - 7,581,000 6,248,000 12,740,000 11,550,000 8,319,000

Bay......

801,200 506,400 1,278,000 456,300 655,600 735,800 6,688,000 6,116,000 9,984,000 14,090,000 7,757,000 l6,120,000 34 DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM

Glla Gravity Main Canal at Imperial Dam, Ariz.-Calif.

Location.- Water-stage recorder, lat. 32°52'35", long. 114°27'15", in SEiSWi sec. 30, T. 6 S., R. 21 W. GILa and Salt River meridian, 3,200 feet downstream from Intake at east end of Imperial Dam. Datum of gage Is 160.00 feet above nean sea level, datum of 1929. Records available.- August 1943 to September 1944. Extremes.- Maximum discharge during year, 657 second-feet Nov. 3 (gage height, 12.6 feetJ; minimum dally, 17 second-feet Oct. 8. 1943-44: Maximum discharge, that of Nov. 3, 1943: minimum daily, that of Oct. 8. 1943. ' Remarks.- Records good. Glla Gravity Main Canal diverts water from Colorado River at .east end of Imperial Dam. Water Is used for Irrigation and supplying airports and cantonments of U. S. Army.

Discharge, in second-feet, water year October 1943 to September 1944 Da; Oct. Nov. Dec. Jan.' Feb. Mar. Apr. May June July Aug. Sept.

1 815 32 81 58 73 75 74 88 100 118 74 78 2 216 109 46 60 69 75 170 87 83 98 86 79 3 219 419 106 60 66 74 160 64 70 110 79 85 4 193 290 92 59 67 75 167 58 76 104 87 84 5 38 22 38 46 65 76 168 57 96 100 91 73 6 18 81 50 63 66 75 196 60 80 101 99 82 7 18 34 100 63 65 74 811 68 107 102 96 88 S 17 34 97 64 68 73 185 86 134 96 96 79 9 18 34 81 64 74 74 154 106 134 90 99 77 10 IS 34 66 65 75 75 168 100 180 98 99 85 11 20 34 66 64 76 76 175 94 81 88 S8 87 12 34 68 66 64 76 75 174 73 87 102 101 75 13 37 214 66 66 74 78 136 51 83 106 97 84 14 35 70 66 66 76 76 134 46 74 138 102 68 15 36 88 66 66 75 77 58 68 81 110 100 100 16 38 250 64 66 73 79 57 94 87 113 99 160 17 38 246 64 67 73 81 57 90 84 118 94 127 IS 31 156 64 66 73 82 68 96 99 U5 90 118 19 43 70 64 66 74 79 105 85 IDS 117 72 183 20 37 68 64 67 75 85 114 45 94 138 110 114 21 38 84 68 68 73 78 105 39 83 161 88 95 22 39 311 61 69 73 75 58 51 99 189 101 93 23 37 289 62 69 72 86 57 64 106 121 106 96 24 34 149 61 71 73 90 56 79 100 97 89 90 25 34 86 61 72 76 71 55 81 94 78 84 93 26 44 386 60 71 77 68 53 68 100 83 76 92 27 37 253 60 72 77 66 58 58 99 81 79 96 28 29 68 60 73 76 63 61 111 109 63 77 94 29 46 852 60 73 75 63 84 145 116 69 74 96 30 46 154 60 78 64 79 125 120 72 77 90 31 46 - 58 72 - 63 - 91 - 78 78 - Seccnd- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 743 819 rr 56.8 3,460 November...... 4*325 419 2 144 8,580 December ...... 8,072 106 3£i 66. S 4,110 Calendar year ...... January...... 2 042 73 4C 65.9 4,050 February ...... 8 ',105 77 6£ 78.6 4,180 March...... 2,321 90 62 74.9 4,600 April ...... 3,385 211 5£ 113 6,710 May 2,404 145 31 77.5 4,770 June ...... 8,904 134 7C 96.8 5,760 July...... 3,170 161 6! 108 6,890 August ...... 8,782 110 7£ 89.7 5,520 September ...... 8,795 160 6E 93.2 5,540 Water year 1943-44 ...... 32,048 419 17 87.6 63,570 Time basis; Mount-iin war time through Dec. 31, 1943; mountain standard time thereafter, convert war time to standard time, subtract 1 hour. DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM 35

Ail-American Canal near Imperial Dam, Ariz.-Calif.

Location.- Water-stage recorder, lat. 32°52'15", long. 114°28'50", in SEiNWi sec. 17, T. 15 S., R. 24 E. San Bernardino meridian, 6,000 feet downstream from intake at west end of Imperial Dam and 134 miles upstream from turnout to Yutna Main Canal. Datum of gage is 150.00 feet above mean sea level, datum of 1929 (subject to un­ determined changes caused by earthquake of May 18, 1940). Records available.- October 1939 to September 1944. Extremes.- Maximum discharge during year, 10,600 second-feet July 26 (gage height, 19.56 feet); minimum, 2,710 second-feet Dec. 10 (gage height, 12.11 feet). 1939-44: Maximum discharge, that of July 26, 1944: no flow part of each year 1939 to 1941 and 1943. Remarks.- Records excellent. All-American Canal diverts water from Colorado River at Imperial Dam for Irrigation in Yuma and Imperial Valleys,, and for power development.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 6,160 6,160 4,970 3,490 5,120 3,720 6,340 5,860 6,250 6,340 9,930 3,560 2 e-,080 6,070 4,720 3,510 5,330 3,660 6,350 6,110 6,170 6,230 io;ooo 8,460 3 6,090 6,020 4,830 ,550 4,9SO 3,650 6,340 6,010 5,870 6,120 10,000 3,440 4 6,290 5,620 4,790 ,640 4,930 3,650 6,480 5,850 5,810 6,130 9,920 8,270 5 6,570 5,630 4,850 ,800 4,650 3,810 6,620 5,950 6,030 6,180 9,720 8,200 6 6,870 5,570 4,760 ,950 4,970 4,120 6,330 5,870 6,180 6,510 9,640 3,370 7 6,480 5,650 3,190 ,030 4,950 4,600 6,470 5,660 6,340 6,510 9,660 8,350 B 6,380 5,840 3,380 ,950 4,900 5,260 6,610 5,310 6,600 6,300 9,720 8,320 9 6,310 5,880 3,780 ,090 5,040 5,560 6,470 6,340 6,730 6,250 9,720 8,140 10 6,270 6,160 2,890 ,360 4,910 6,010 6,650 6,560 6,510 6,410 9,470 8,160 11 6,490 5,760 2,930 ,590 4,920 6,120 6,870 6,140 6,250 6,300 9,400 8,150 12 6,540 5,940 2,940 '. ,720 5,020 6,110 6,920 5,970 6,310 6,420 9,300 6,930 13 6,600 5,810 3,050 ,730 5,020 6,350 6,470 5,340 6,540 6,100 9,190 5,640 14 6,410 5,520 3,390 ,750 5,560 6,770 6,240 5,920 6,660 6,290 9,270 5,370 15 6,460 5,450 3,340 ,920 5,790 6,830 6,080 6,010 6,680 6,210 9,350 5,210 16 6,350 5,350 3,330 ,700 5,820 6,600 6,350 6,220 6,660 6,240 9,210 5,120 17 6,180 5,440 3,320 ,920 5,530 6,480 6,350 5,780 6,420 6,240 9,120 5,160 .18 6,280 5,450 3,250 ,150 5,620 6,360 6,450 5,890 6,330 6,190 S,S90 5,200 19 6,400 5,540 2,900 5,320 5,730 5,920 6,530 5,890 6,430 7,270 8,620 5,500 20 6,620 5,250 3,030 5,400 5,640 5,750 6,640 5,720 6,530 8,320 S,490 5,720 21 6,720 5,120 3,080 5,330 5,000 6,230 6,330 5,810 6,560 9,410 8,560 6,000 22 6,730 5,170 3,100 5,060 4,650 6,490 5,910 5,870 6,430 10,100 8,690 6,010 23 6,720 5,050 3,090 4,940 4,010 6,550 5,840 6,090 6,390 10,100 8,650 6,080 24 6,420 4,980 3,080 5,340 2,990 6,590 6,160 5,970 6,360 10,100 8,410 5,920 25 6,410 4,800 3,090 5,520 2,970 6,530 6,160 5,980 6,470 10,300 8,430 6,080 26 6,390 4,950 3,120 5,360 3,150 6,350 6,190 5,990 6,390 10,500 3,450 6,260 27 6,320 4,910 3,310 5,140 3,390 6,490 6,290 5,890 6,440 10,400 8,340 6,230 28 6,360 4,920 3,430 5,170 3,510 6,680 6,160 5,640 6,620 10,300 8,430 6,350 29 6,380 4,980 3,410 5,080 3,670- _ 6,770 5,920 5,720 6,650 10,200 8,550 6,330 30 6,180 5,000 3,460 4,790 6,550 5,670 5,790 6,590 10,100 8,580 6,280 31 5,960 - 3,480 4,890 - 6,440 - 5,780 ~ 10,000 8,520 -

Second- Runoff in Month fcot-days Maximum Minimum Mean ao re-feet

December...... 109,790 4,970 2.89C 3,542 217,800 Calendar year 1943 ...... 1,987,410 7,320 2,S9C 5,445 3,942,000

April ...... May...... 192 250 7 744 September...... 202,830 8,560 5.12C 6,761 402,300 Water year 1945-44 ...... 2,224,360 10,500 2,690 6,078 4,412,000 Time baala! Mountain war time through Dec. 31, 1943; mountain standard time ther after. To con- ert war time to standard time, subtract 1 hour. 36 DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM

All-Amerlcan Canal above Pilot Knob wasteway, Calif.

Location.- Water-stage recorder, lat. 32045'00", long. 114°42'20", In NWfcSEi sec. 24, T. 16 S., R. 21 E. San Bernardino meridian, at bridge on U. S. Highway 80, 1 mile up­ stream from Pilot Knob wasteway, 5 miles downstream from turnout to Yuma Jfeln Canal, 5i miles northwest of Yuma, and 194 miles downstream from Intake at Imperial Dam. Datum of gage Is 148.52 feet above mean sea level, datum of 1929. Auxiliary water- stage recorder, in NEiNWj sec. 15, T. 16 3., R. 22 E., on wash overshoot structure 4.4 miles upstream. Records available.- October 1938 to September 1944. Extremes.- Maximum daily discharge during year, 8,430 second-feet July 26; maximum gage neight, 13.45 feet Aug. 29; minimum dally discharge, 836 second-feet Dec. 19. 1938-44: rfaxlmum dally discharge, that of July 26, 1944; maximum gage height, 13.80 feet July 21, 1943; no flow on several days since continuous operation began Sept. 18, 1940. Remarks.- Records excellent. Discharge computed by using fall as determined by auxiliary water-stage recorder as a factor. Flow past this station shows water available for power development and for irrigation in Imperial Valley, except for waste at Pilot Knob wasteway and canal losses.

Discharge, in second-feet, water year October 1943 to September 1944 Da? Oct. Nov. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept.

1 4,120 4,070 2,370 1,460 3,090 1,720 4,340 3,720 ,260 4,400 3,030 6,600 2 4,030 4,050 2,710 1,450 5,560 1,710 4,310 4,080 ,170 4,270 S,130 6,490 3,950 4,020 2,750 1,53O 3,060 1,680 4,260 4,030 ,870 4,130 8,080 6,450 4 4,120 3,680 2,730 1,620 3,010 1,680 4,440 3,860 ,660 4,240 3,010 6,260 5 4,380 3,710 2,780 1,790 2,730 1,770 4,650 3,960 ,890 4,220 7,610 6,170 6 4,700 3,560 2,750 1,970 2,900 2,060 4,340 3,920 ,110 4,570 7,730 6,360 7 4,450 3, 890 1,420 2,000 2,990 2,490 4,480 3,610 ,210 4,540 7,730 6,290 8 4,300 5,750 1,950 1,920 2,880 3,080 4,650 3,700 ,420 4,420 7,800 6,260 9 4,250 3,780 1,940 2,07O 3,090 3,460 4,430 4,130 ,600 4,260 7,810 6,100 10 4,170 3,990 957 2,250 2,940 3,930 4,560 4,660 ,450 4,440 7,620 6,070 11 4,360 3,700 1,040 2,510 2,930 4,050 4,790 4,160 ,160 4,330 7,S30 6,980 12 4,420 3,350 1,010 2,830 3,050 4,120 4,970 4,030 ,160 4,490 7,380 6,220 13 4,470 3,760 1,060 2,700 2,960 4,400 4,490 3,910 ,420 4,160 7,180 3,790 14 4,310 3,480 1,490 2,760 3,370 4,730 4,190 3,960 ,560 4,260 7,180 3,070 15 4,350 3,480 1,450 2,930 3,620 4,610 4,040 4,120 ,680 4,160 7,210 3,090 16 4,290 3,290 1,460 2,760 3,720 4,460 4,240 4,300 ,640 4,190 7,140 3,070 17 4,090 3,380 1,440 2,920 3,480 4,380 4,290 3,320 ,370 4,190 7,070 3,240 18 4,260 3,410 1,420 3,150 3,500 4,320 4,440 3,860 ,230 4,130 6,790 3,140 19 4,280 3,320 836 3,330 3,520 4,000 4,530 3,900 ,350 5,250 6,570 3,390 20 4.490 3,220 964 3,450 3,440 3,720 4,660 3,730 ,500 6,370 6,380 3,650 21 4,610 3,010 1,070 3,410 2,900 4,190 4,400 3,840 ,600 7,420 6,, 450 3,930 22 4,630 3,110 1,020 3,190 2,610 4,430 3,960 3,860 ,430 8,000 6,610 3,980 23 4,650 3,000 1,030 3,030 1,910 4,550 3,790 4,160 ,380 3,080 6,530 4,070 24 4,420 2,990 1,050 3,340 1,010 4,620 4,180 4,060 ,360 3,060 6,400 3,870 26 4,380 2,820 1,050 3,510 947 4,570 4,180 4,090 ,490 3,240 6,530 3,960 26 4,370 2,910 1,080 3,410 1,100 4,360 4,170 4,090 ,360 8,430 6,540 4,240 27 4,320 2,880 1,200 3,190 1,340 4,460 4,260 3,970 ,400 8,370 6,430 4,200 28 4,360 2,880 1,320 3,210 1,460 4,610 4,130 3,730 ,600 8,250 6,420 4,360 29 4,390 2,890 1,360 3,140 1,660 4,700 3,960 3,780 ,650 8,190 6,560 4,370 30 4,190 2,900 1,370 2,880 _ 4,530 3,610 3,910 ,670 8,010 6,640 4,260 31 3,970 ~ 1,440 2,920 - 4,440 ; 3,780 - 8,040 6,480 - Second- Runoff In Month foot-clays Haxioua Minima Mean ao re-feet

December...... 48,017 2,870 836 1,549 95,240 Calendar year 1943 ...... 1,237,947 5,090 836 3,392 2,465,000 January 1 450 2 ARO ra RA*7 2 709 March...... Q9Q IVQQ April...... 4,320 Bay......

September...... 141,790 6,600 3,070 4,726 281,200 Water year 1943-44 ...... 1,484,994 8,430 836 4,067 2,945,000 Time basis; Mountain war time through Dec. 31, 1943; mountain standard time thereafter, vert war tine to standard tine, subtract 1 hour. DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM 37

Yuma Main Canal at siphon-drop power plant, near Yuma, Arlz.

Location.- Staff gage on forebay and water-stage recorder on tallrace at power plant, lat. 32°46'35*, long. 114°38'05", in SEiSEi sec. 10, T. 16 S., R. 28 E. San Bernardino meridian, 500 feet from turnout In All-Amerlcan Canal to Yuma Main Canal, Si miles north ot Yuma, and 14i miles downstream from Intake of All-Amerlcan Canal at Imperial Dam. Datum of each gage is at mean sea level, Yuma project datum, or 0.70 foot above mean sea level, datum of 1929 (subject to undetermined changes caused by earthquake of May 18, 1940). Records available.- October 1938 to September 1944. Extremes.- Maximum dally discharge during year, 2,000 second-feet many days during October and November; minimum dally, 1,910 second-feet Dec. 7, Feb. 25. 1938-44: Maximum dally discharge, 2,040 second-feet Nov. 11, 1943: no flow Sept. 5-11, 1939. Remarks.- Records excellent. Dally discharge determined from flow through turbines, com- puted from relation between discharge, head, and gate openings, to which is added small discharge passed around power plant through waste gates. Bypassed discharge computed on basis of gage readings at forebay, and record of waste gate openings, by orifice formula. Rating of turbines checked by current-meter measurements. Records show Quantity of water diverted from All-Amerlcan Canal for power development and Irrigation on Valley division of Yuma project. Water not needed for Irrigation Is returned to Colorado River through Yuma Main Canal wasteway, 3 miles downstream. Cooperation.- Record of gage heights on forebay and of turbine gate openings furnished by Bureau of Reclamation.

Discharge, In second-feet, water year October 1943 to September 1944 Das Oct. Nov. Dec. Jan. Feb. Mar. Apr. "ay June July Aug. Sept.

1 2,000 2,000 1,930 1,960 1,940 1,960 1,960 1,960 1,960 1,930 1,950 1,960 2 2,000 2,000 1,980 1,960 1,960 1,950 1,960 1,960 1,960 1,980 1,950 1,960 3 2,000 2,000 1,980 1,960 1,930 1,950 1,960 1,960 1,960 1,940 1,950 1,960 4 2,000 2,000 1,9SO 1,950 1,940 1,950 1,950 1,960 1,960 1,940 1,960 1,960 5 2,000 2,000 1,930 1,960 1,930 1,960 1,960 1,960 1,960 1,940 1,950 1,960 6 2,000 1,990 1,930 1,940 1,940 1,960 1,950 1,960 1,960 1,940 1,940 1,960 7 2,000 2,000 1,910 1,940 1,940 1,960 1,960 1,960 1,960 1,960 1,940 1,960 8 2,000 2,000 1,960 1,940 1,940 1,960 1,960 1,960 1,960 1,960 1,940 1,960 9 2,000 2,000 1,960 1,940 1,960 1,960 1,950 1,960 1,960 1,960 1,960 1,960 10 2,000 2,000 1,940 1,940 1,940 1,960 1,950 1,960 1,960 1,960 1,950 1,960 11 2,000 1,990 1,930 1,940 1,940 1,960 1,950 1,960 1,960 1,950 1,940 1,960 .12 2,000 2.000 1,960 1,940 1,960 1,940 1,960 1,960 1,960 1,960 1,940 1,960 13 2,000 2,000 1,970 1,940 1,960 1,940 1,960 1,960 1,960 1,950 1,950 1,960 14 1,990 1,990 1,960 1,940 1,950 1,960 1,950 1,960 1,960 1,950 1,950 1,960 15 2,000 1,990 1,940 1,940 1,960 1,960 1,960, 1,960 1,960 1,950 1,960 1,960 16 1,990 1,990 1,950 1,940 1,960 1,960 1,960 1,950 1,960 1,960 1,960 1,960 17 1,990 1,990 1,940 1,960 1,960 1,960 1,960 1,960 1,960 1,940 1,960 1,960 18 2,000 2,000 1,960 1,960 1,960 1,960 1,950 1,960 1,960 1,930 1,960 1,960 19 2,000 2,000 1,930 1,960 1,960 1,960 1,950 1,960 1,960 1,940 1,950 1,960 20 2,000 1,990 1,940 1,940 1,950 1,960 1,960 1,960 1,96O 1,940 1,960 1,960 21 2,000 1,980 1,940 1,940 1,950 1,960 1,960 1,960 1,960 1,940 1,950 1,960 22 2,000 1,980 1,940 1,940 1,960 1,960 1,960 1,960 1,960 1,940 1,960 1,960 23 2,000 1,980 1,960 1,940 1,960 1,960 1,960 1,960 1,960 1,940 1,950- 1,960 24 2,000 1,930 1,960 1,950 1,940 1,960 1,950 1,960 1,970 1,940 1,960 1,970 25 2,000 1,970 1,950 1,960 1,910 1,960 1,950 1,960 1,970 1,940 1,960 1,960 26 2,000 1,930 1,950 1,940 1,920 1,960 1,960 1,960 1,960 1,960 1,950 1,960 27 2,000 1,9SO 1,940 1,940 1,950 1,960 1,960 1,960 1,960 1,950 1,960 1,960 28 2,000 1,980 1,950 1,950 1,950 1,960 1,960 1,960 1,960 1,950 1,960 1,960 29 2,000 1,980 1,950 1,950 1,960 1,960 1,960 1,960 1,950 1,950 1,950 1,960 30 2,000 1,980 1,940 1,930 _ 1,950 1,950 1,960 1,940 1,950 1,960 1,960 31 2,000 - 1,940 1,940 - 1,940 - 1,960 - 1,950 1,960 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

1,991 118,500 December...... 60,610 1,960 1,910 1,958 120,000 Calendar year 1943 ...... 713,910 2,030 1,170 1,966 1,416,000 January 119,600 1,910 1,944 111,800 llarch...... 1,955 120,200 116,900 May...... 1,960 120,400 1,940 1,959 116,500 60,290 1,960 1,920 1,945 119,600 60,510 1,960 1,940 1,958 120,000 September...... 58,800 1,970 1,960 1,960 116,600 Water year 1943-44 ...... 717,150 2,000 1,910 1,959 1,422,000 Time basis; Mountain war time through Dec. 31, 1943; mountain standard time thereafter, vert war time to standard time, subtract 1 hour. 38 DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM

Yuma Main Canal below Colorado River siphon, at Yuma, Ariz.

Location.- Two gages determine head on Colorado River siphon. At Intake, water-stage recorder, lat. 32°43'50", long. 114°37'10", In 3WiSEi sec. 26, T. 16 S., K. 22 E. San Bernardlno meridian, on California side of river, 1,645 feet downstream from center of Yuma Main Canal wasteway gates and 3i miles downstream from siphon-drop power plant. At outlet, water-stage recorder In NWiNEi sec. 35, T. 16 S., R. 22 E. San Bernardlno meridian, on Arizona side of river. Both gages are a quarter of a mils downstream from highway bridge over Colorado River at Yuma. Datum of each gage Is 100.03 feet above mean sea level, Yuma project datum, or 100.57 feet, datum of 1929. Records available.- October 1938 to September 1944. Extremes.- Maximum dally discharge during year, 697 second-feet Oct. 26 (head, 1.42 feet); minimum dally, 309 second-feet May 20 (head, 0.29 foot). 1938-44: Maximum discharge, 784 second-feet Apr. 11, 1939 (head, 1.65 feet); no flow during short periods In most years. Remarks.- Records excellent. Daily discharge computed from relation between discharge and head on siphon, which Is the difference between stages at Intake and outlet gages. Records show quantity of water diverted to Valley division of Yuma project for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOV. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 570 659 514 404 571 40S 512 610 590 380 569 626 2 545 666 495 404 537 563 467 605 579 341 559 473 3 52S 682 451 526 469 344 624 599 479 629 521 463 4 649 6S3 391 507 440 329 650 596 409 5S2 525 602 5 639 669 38,6 490 488 329 658 565 605 547 451 585 6 659 623 552 442 452 605 609 455 5S5 542 436 576 7 632 533 572 416 554 490 571 430 555 527 597 557 8 647 645 559 415 551 480 508 624 506 410 5S2 52S 9 638 664 494 377 509 482 419 63S 473 375 570 498 10 521 «50 435 545 474 457 631 618 438 592 544 455 11 672 654 424 534 466 438 641 578 3S5 595 538 666 12 696 647 424 500 422 375 632 536 606 550 504 656 13 692 581 550 485 367 597 639 495 6S3 S24 461 608 14 682 532 562 443 571 620 605 416 667 485 652 585 15 6S4 665 545 400 561 616 536 632 600 404 664 543 16 655 666 475 363 532 585 462 601 554 364 633 4S2 17 566 600 443 575 495 541 -633 547 447 606 531 467 18 653 557 429 600 474 505 639 546 41S 593 493 672 19 648 520 391 577 426 4S6 621 516 605 544 432 680 20 604 478 507 536 409 604 5S4 309 608 549 360 642 21 577 440 527 535 447 613 552 400 611 621 657 625 22 595 59S 472 495 519 591 502 626 603 454 671 594 23 511 592 4S5 408 512 586 444 636 548 381 659 554 24 437 550 398 578 386 545 651 631 397 593 643 529 25 664 520 377 564 370 501 648 591 338 594 620 671 26 697 546 368 56S 382 470 629 573 605 568 542 665 27 653 494 446 531 373 59S 600 472 580 534 522 66S 28 628 424 467 493 431 627 539 390 591 502 639 665 29 638 579 486 448 447 624 450 574 542 393 627 658 30 617 548 420 452 _ 628 435 597 494 355 603 620 31 565 - 416 580 - 584 - 597 - 570 573 - Seccnd- Runoff in Month foot-days Maximum Minimum Mean ao re-feet October...... 19,162 697 437 618 38,010 November. . r...... 17,667 683 424 589 35,040 December...... 14,405 578 366 465 28,570 Calendar year 1943 ...... 201,842 717 334 553 400,400 January ...... 15,186 600 363 490 30,120 February...... 13,635 571 367 470 27,040 March...... 15,921 628 329 514 31,580 April ...... 17,071 651 419 569 33,860 Maymay ...... 17,003 638 309 548 35,720 June ...... 16,101 683 338 537 31,940 July...... 15,604 629 341 503 30,950 August ...... 17,378 671 360 561 34,470 September ...... 17,513 680 455 584 34,740 Water year 1943-44 ...... 196,646 697 309 537 390,000 Time baala; Mountain war ti e through Dec. 31, 1943J mountain standard time thereafter, vert war time to standard time subtract 1 hour. DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM 39

Yuma Canal wasteway at Yuma, Ariz.

Location.- Yuma Main Canal wasteway receives water from Yuma Main Canal at gates, lat. 32D4"4"T00" , long. 114°37'20", in SWiSEi sec. 26, T. 16 S., R. 22 E. San Bernardino meridian, 1,645 feet upstream from intake of Colorado River siphon on Yuma Ifciln Canal, half a mile north of Yuma, and 3i miles downstream from siphon-drop power plant on Yuma Main Canal. The wasteway discharges into Colorado River half a mile downstream from station on Colorado River at Yuma. Records available.- April 1913 to September 1944. Records of monthly discharge prior to October1 1938, published in Water-Supply paper 918. Those prior to October 1928 not previously published. Extremes.- Maximum daily discharge during year, 1,650 second-feet my 20; minimum daily, 1,260 second-feet June 13. 1930-44: Maximum daily discharge, 1,900 second-feet Feb. 21, 1932; no flow several days in 1937, 1938, 1939. Remarks.- Records good. Discharge computed as difference between discharge of Yuma Main canal at siphon-drop power plant and that of same canal below Colorado River siphon, with deduction tor small irrigation diversions from canal between those stations. Records do not Include flow of California Drainage Canal which discharges into Colorado River at mouth of wasteway.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Bay June July Aug. Sept.

1 1,430 1,330 1,470 1,550 1,370 1,640 1,440 1,340 1,360 1,660 1,380 1,430 2 1,460 1,320 1,480 1,550 1,410 1,590 1,490 1,360 1,580 1,580 1,390 1,490 Z 1,470 1,310 1,530 1,420 1,460 1,610 1,330 1,360 1,480 1,310 1,430 1,500 4 1,360 1,320 1,690 1,440 1,600 1,620 1,290 1,360 1,650 1,350 1,420 1,350 5 1,360 1,330 1,590 1,460 1,440 1,630 1,320 1,390 1,350 1,390 1,600 1,360

6 1,340 1,370 1,430 1,600 1,480 1,460 1,340 1,600 1,370 1,390 1,600 1,380 1,360 1,470 1,340 1,520 1,380 1,470 1,390 1,630 1,400 1,410 1,340 1,400 8 1,360 1,360 1,380 1,520 1,390 1,480 1,450 1,330 1,460 1,540 1,360 1,430 1,360 1,340 1,460 1,560 1,430 1,480 1,630 1,300 1,430 1,580 1,370 1,460 10 1,480 1,350 1,600 1,400 1,460 1,600 1,310 1,330 1,520 1,360 1,410 1,500 11 1,380 1,340 1,600 1,410 1,460 1,610 1,300 1,380 1,580 1,350 1,400 1,290 12 1,300 1,360 1,630 1,440 1,530 1.560 1,310 1,420 1,340 1,400 1,440 1,300 13 1,310 1,420 1,410 1,450 1,580 1,340 1,300 1,460 1,260 1,430 1,490 1,360 14 1,300 1,460 1,390 1,490 1,370 1,320 1,340 1,540 1,290 1,460 1,290 1,380 15 1,320 1,320 1,390 1,540 1,3SO 1,320 1,420 1,320 1,360 1,550 1,290 1,420 16 1,340 1,320 1,480 1,580 1,410 1,360 1,500 1,340 1,410 1,690 1,330 1,480 17 1,420 1,390 1,600 1,370 1,460 1,410 1,320 1,410 1,610 1,330 1,430 1,490 18 1,340 1,440 1,520 1,340 1,-480 1,460 1,310 1,410 1,640 1,340 1,470 1,280 19 1,340 1,4SO 1,540 1,360 1,530 1,460 1,320 1,440 1,350 1,400 1,520 1,270 20 1,400 1,610 1,430 1,400 1,540 1,340 1,370 1,660 1,340 1,390 1,600 1,310 21 1,420 1,640 1,400 1,400 1,600 1,330 1,400 1,560 1,340 1,410 1,290 1,340 22 1,400 1,380 1,470 1,440 1,420 1,360 1,460 1,330 1,360 1,480 1,270 1,370 23 1,490 1,390 1,520 1,630 1,430 1,370 1,520 1,310 1,410 1,560 1,290 1,410 24 1,560 1,430 1,560 1,370 1,550 1,400 1,290 1,320 1,670 1,340 1,320 1,440 25 1,330 1,450 1,570 1,380 1,540 1,450 1,300 1,560 1,630 1,340 1,340 1,280 26 1,300 1,430 1,580 1,370 1,540 1,480 1,320 1,380 1,350 1,3SO 1,41O 1,290 27 1,360 1,490 1,490 1,400 1,580 1,360 1,360 1,480 1,370 1,420 ' 1,440 1,290 28 1,360 1,560 1,480 1,460 1,620 1,320 1,410 1,670 1,370 1,450 1,310 1,290 29 1,360 1,400 1,460 1,600 1,510 1,330 1,610 1,380 1,400 1,560 1,310 1,300 30 1,370 1,430 1,520 1,480 _ 1,320 1,520 1,350 1,450 1,600 1,360 1,340 31 1,430 ~ 1,520 1,360 - 1,360 - 1,350 - 1,370 1,390 - Seccnd- Runoff in Month fcct-days Maximum Minimum Mean acre-feet

1,378 84,710 December...... 46,030 1,690 1,340 1,485 91,300 Calendar year 1943 ...... 511,220 1,670 490 1,401 1,014,000 1,580 1,340 1,461 89,220 1,580 1,370 1,471 84,500 1,630 1,320 1,436 SS.320 April...... 41,470 1,630 1,290 1,382 82,250 May...... 1,650 1,300 1,405 86,400 42,560 1,630 1,260 1,419 84,420 44,610 1,600 1,310 1,439 88,480 43,070 1,SOO 1,270 1,389 85,430 September...... 41,220 1,500 1,270 1,374 61,760 Water year 1943-44 ...... 619,410 1,660 1,260 1,419 1,030,000 Time basis; Mountain war time through Dec. 31, 1943; mountain standard time thereafter. vorfr war tine" to standard time, subtract 1 hour. 40 DIVERSION* AND RETURN FLOWS AT AND BELOW IMPERIAL DAM

Pilot Knob wasteway near Pilot Knob, Calif.

Location.- Water-stage recorder on All-American Canal 550 feet upstream from waste gates at lat. 32°44'15", long. 114°42'55", In NWjSW* sec. 25, T. 16 S., R. 21 E. San Bernardlno meridian, 2 miles east of summit of Pilot Knob, 6 miles west of Yum, and 20.8 miles downstream from intake of All-Amerlcan Canal at Imperial Dam. Datum of gage Is at mean sea level, datum of 1929. July 21 to August 31, staff gage at same site and datum. Records available.- July to September 1944. Also computations of discharge for periods when there was flow prior to July 1944 (Feb. 5 to Mar. 13, Sept. 24-28, 1939, and Apr. 16, 1941; see "Remarks"). Extremes.- Maximum daily discharge during year, 4,460 second-feet July 24; no flow during year prior to July 19 and after September 13. 1939-44: Maximum dally discharge, that of July 24, 1944; no flow during long periods. Remarks.- Records good. Dally discharge computed from head and openings of waste gates and checked by current-meter measurements In All-American Canal above and below waste- way and In Alamo Canal at Hanlon heading. Record shows water diverted from All- Amerlcan Canal to Alamo Canal for use In Mexico or for return to Colorado River through Rockwood gate. Records of Imperial Irrigation District show that during period July 19 to Sept. 13, 1944, 793 acre-feet was returnsd to Colorado River and remainder diverted .to Alamo Canal. No flow through this wasteway prior to July 19, 1944, except for 9,980 acre-feet Feb. 5-28, 1939, and 9,210 acre-feet Mar. 1-13, 1939 (computed on basis of record for All-Amerlcan Canal, 1 mile above wasteway, neglecting canal losses), 2,270 acre-feet Sept. 24-28, 1939 (computed on basis of difference In discharge between stations on All-Amerlcan Canal, 1 mile above wasteway and 1.5 miles below, allowing for canal losses), and 780 acre-feet Apr. 16, 1941 (computed from records of head and gate openings). Cooperation.- Record of gate openings and other data furnished by Bureau of Reclamation. Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 4,330 3,680 2 0 4,330 3,680 3 0 4,330 3,680 4 0 4,380 3,670 5 0 4,890 3,600 6 0 4,880 3,400 7 0 4,890 3,300 8 0 4,290 3,140 9 0 4,290 3,060 10 0 4,890 3,020 11 0 4,300 2,910 12 0 4,190 1,860 13 0 4,070 374 14 0 3,9SO 0 15 0 3,960 0 16 0 3,800 0 17 0 3,720 0 18 0 3,690 0 19 694 3,430 0 20 1,780 3,330 0 21 8,980 3,380 0 22 4,000 3,420 0 23 4,390 3,420 0 24 4,460 3,130 0 25 4,380 3,130 0 26 4,430 3,310 0 27 4,430 3,890 0 28 4,360 3,280 0 29 4,320 3,370 0 30 4,380 3,430 0 31 4,340 3,580 - Second- Runoff in Month foot-days Maxiaun Miniaun Mean acre-feet

October...... 0 0 0 0 0 November...... 0 0 0 0 0 December...... 0 0 0 0 0 Calendar year 1943 ...... 0 0 0 0 P January...... 0 0 0 0 0 February...... 0 0 0 0 0 March...... 0 0 0 0 0 April...... 0 0 0 0 0 Man ay...... 0 0 0 0 0 June ...... 0 0 0 0 0 July...... 48,884 4,460 0 1,577 96,960 August ...... 118,140 4,330 3,130 3,811 834,300 September...... 38,864 3,580 0 1,295 77,070 Water year 1943-44 ...... 205,378 4,460 0 563 408,300 Time basis; Mountain standard tins prior to 2 a.m., Feb. 9, 1948J mountain war tine thereafter. To convert war tins to standard time, subtract 1 hour. DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM 41

Diversions at Laguna Dam, Arlz.-Calif.

Location.- Laguna Dam, lat. 32°49'30", long. 114°29'40", Is a diversion dam across Colorado River, 5 miles downstream from Imperial Dam, 9 miles upstream from Olla River, and 10 miles northeast of Yuma, Arlz. Yuma Canal diverts water at California end of dam In NEi sec. 25, T. 15 S., R. 23 E. San Bernardlno meridian, and North alia Valley Canal diverts water at Arizona end of dam In SWi sec. 14, T. 7 S., R. 22 W. Olla and Salt River meridian. Records available.- Yuma Canal (formerly published as Yuma Rain Canal): March 1910 to September 1944. North Glla Valley Canal: March 1935 to September 1944. Records prior to October 1938 published In Water-Supply Paper 918. Remarks.- Yuma Canal furnishes most of water for Irrigation of Yuma project in California east of Yuma Kaln Canal. Prior to Aug. 4, 1941, this canal was part of Yuma Main Canal, after whl-ch date all water to Yuma Main Canal was supplied from All-Amerlcan Canal at siphon-drop power plant. North alia Valley Canal supplies water for Irriga­ tion of, North Oila Valley In Arizona. Cooperation.- Records furnished by Bureau of Reclamation.

Monthly diversions. In acre-feet, of Yuma Canal at Laguna Dam, Arlz.-Calif., water years 1938-39 to 1943-44 Month 1938-59 1939-40 1940-41 1941-48 1948-43 1943-44 5 nan 1 OQ 1 Aft 104 900 6 *770

Calendar year. . 1,169,000 1,245,000 1,314,000 778,400 79,250 77,780

Bay...... 117 500

34,960 107,600 6,640 7,190 6,560 5,870 Water year ...... 1,269,000 1,301,000 1,087,000 77,360 76,340 76,800

Monthly diversions, in acre-feet, of North Oila Valley Canal at Laguna Dam, Arlz.-Calif., water years 1938-39 to 1943-44 Month 1938-39 1939-40 1940-41 1941-48 1942-43 1943-44 1,920 2,160 2,640 1,670 1,360 1,890 2,720 1,610 1,430 1,250 1,800 g, 060 2,280 Calendar year... 39,570 34,950 36,710 25,400 27,230 26,500

2,780 May...... 2,780 2,380 2,840 2,700 S QAfl 1,710 2,540 1,570 3,770 2,820 1,660 2,440 2,680 Water year...... 34,480 37,580 26,700 25,700 24,970 31,290 670650 O - 46 - 4 42 DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM

Alamo Canal at Andrade, Calif.

Location.- Staff gage, lat. 32°43'10", long. 114°43'30", In SWiSEi sec. 35, T. 16 S., R. 21 E. San Bernardino meridian, at Andrade, 200 feet upstream from International boundary, 800 feet downstream from Hanlon heading, and li miles downstream from Rock- wood gate. Records available.- January 1908 to September 1944. Records prior to 1939 published In Water-supply Paper 918 as Imperial Canal at Hanlon heading at Andrade, Calif. Remarks.- Figures given herein are those of flow diverted from Colorado River and are computed from frequent current-meter measurements and staff-gage readings. Canal diverts water from right side of Colorado Rl7er In SEiSWi sec. 25, T. 16 S., R. 21 E. San Bernardino meridian, at Rockwood gate, 24i miles downstream from Imperial Dam. Also, at times between February 1939 and September 1944, It received water from Pilot Knob wasteway (see p. 40 ). Diversion Into canal Is separately controlled at Hanlon heading, a set of gates on canal about 1,000 feet upstream from the boundary. Hanlon heading has controlled this diversion since February 1907. The water Is used for Irrigation of lands In Imperial Valley In Mexico and also, prior to Feb. 14, 1942, In Imperial Valley In the United States. Cooperation.- Records of monthly dl7erslons, In acre-feet, furnished by Imperial Irrlga- tlon District and converted to second-feet by Geological Survey. Revisions.- Revised figures of discharge for water years 1935-36 to 1937-38 given herein, superseding those published In Water-Supply Paper 918.

Monthly diveraiona, water yeara 1935-36 to 1943-44 1935-36 1936-37 1987-38 Month Second-feet Acre-feet Second-feet Acre-feet Second-feet A ere -feet 4,165 256,100 4,535 278,800 4,960 305,000 3,337 198,600 3,600 214,200 4,060 241,600 3,032 186,400 3,319 204,100 4,140 254,600 4,338 3,141,000 5,083 3,690,000 5,394 3,905,000 3* 308 203,400 2,996 184,200 3,796 233,400 2,930 168,600 3,822 212,300 3,941 218,900 5,982 367,800 5,479 336 ,900 5,198 319,600 6,696 39S,40O 6,717 399,700 6,527 388,400 May...... 5, SOS 320,200 5,574 342,800 5,655 347,700 6,638 395,000 6,600 392,700 6,433 382,800 6,738 414,300 7,523 462,500 7,095 436,300 6,369 391,600 7,153 439 ,800 6,077 373,700 5,610 333,800 5,590 332,600 5,332 317,300 5,006 3,634,000 5,250 8,801,000 5,275 3,819,000 Month 1938-39 1939-40 1940-41 5,018 308,500 4,134 254,200 4,585 281,900 3,993 237,600 3,612 214,900 3,142 187,000 3,315 203,900 4,008 246,500 1,887 116,000 5,205 3,768,000 4,878 3,532,000 4,798 3,483,000 2,902 178,400 3,969 244,000 1,500 92,250 4,228 234,800 4,326 246,900 2,436 135,300 6,805 418,400 6,173 379,600 3,202 196,900 6,761 402,300 6,281 373,800 4,295 255,600 MRT 5,339 328,300 3,911 240,500 3,745 230,300 6,315 375,800 5,619 334,400 4,679 278,400 6,256 384,700 6,439 395,900 5,177 318,300 5,6S3 349,400 5,993 368,500 3, 803 233,800 2,41S 143,900 5,252 312,500 4,221 251 ,200 4,926 3,566,000 4,978 3,614,000 3,560 2,577,000 Month 1941-42 1942-43 1943-44 2,094 128,800 626 . 38,480 692 42,550 1,416 84,260 336 20,000 267 15,900 890 54,740 443 27,210 200 12,300 3,122 2,260,000 1,325 959,400 1,591 1,152,000 769 47,310 322 19,820 222 13,680 450 34,990 407 22,580 238 13,720 1,111 68,330 1,088 66,880 545 33,510 1,821 108,300 2,234 132,900 2,047 121,800 May...... 1,269 78,050 2,463 151,400 2,485 152,800 1,945 115,700 2,236 133,000 1,816 108,000 2,395 147,200 3,388 208,300 2,742 168,600 2,834 174,300 2,913 179,100 3,711 228,200 1,840 109,500 2,811 167,300 2,910 173,200 1,576 1,141,000 1,612 1,167,000 1,494 1,084,000 DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM

Return surface flows from Yuma project, Arlz.,-Calif.

Yuma project of the Bureau of Reclamation lies on both sides of Colorado River In the vicinity of Yuma. Most of the water for the Reservation Division of the project on the California side Is diverted at Laguna Dam by the Yuma Canal (known prior to Aug. 4, 1941, as the Yuma Main Canal). The remainder Is diverted by the Walapal Canal from the forebay of the power plant and by several small canals from the Yuma Main Canal between the power plant and the Yuma Main Canal wasteway. Water for the Valley Division on the Arizona side was supplied from the Yuma Main Canal at Laguna Dam until Aug. 4, 1941. Since that date water for the Valley Division has been obtained from All-American Canal, which diverts from Imperial Dam, by means of a turnout to the Yuma Main Canal at the siphon-drop power plant. After passing the power plant, water not needed for irrigation on Valley Division Is returned to Colorado River by Yuma Main Canal wasteway. On the Reservation Division of the project, waste and drainage water collected by California drainage canal is returned to river at mouth of Yuma Main Canal wasteway, but flow Is not Included In records for wasteway. After crossing Colorado River, Yuma Main Canal divides Into East and West Main Canals which serve lands of Valley Division from the east and west sides, respectively. East and West Main Canals extend to Arlzona-Sonora boundary and discharge waste water across boundary. At three points along west side of division waste water Is returned to Colorado River by Cooper, Eleven-Mile, and Twenty-one Mlle,wasteways which enter Colorado River 2£, 5i, and 15i miles, respectively, by airline downstream from Rockwood gate. After May 1944 waste water from West Main Canal was returned to river through Twenty-one Mile wasteway. Drainage water on Valley Division Is collected by Main drain which discharges across Arlzona-Sonora boundary by pumping. Monthly records of the quantities of water returned to Colorado River or discharged across the Arlzona-Sonora boundary as surface flow from the Yuma project have been com­ piled by the Bureau of Reclamation and are published herewith for the period October 1938 to September 1944.

Monthly return flows from Yuma project, In acre-feet, water years 1938-39 to 1940-41 California Kleven- Twenty- East Cooper West Main Month drainage mile one mile Main drain Kain canal wasteway wasteway wasteway Canal Canal

no 2 940

32 2 120 May...... S£8 5,000 28 4,920 630 210 4,340 1,510 69 * 390

324

May...... 7 440 123

144 2,630 592 8,380 2,650 268 5,630 2,510 25,190

312 May...... 422 2.0SO 2,130 1,810 24,680 44 DIVERSIONS AND RETURN .FLOWS AT AND BELOW IMPERIAL DAM

Monthly return flows from Yuma Project, in acre-feet, water years 1938-39 to 1940-41 Continued California Eleven- Twenty- West East Month drainage Cooper Main wastenay mile one mile Main Main canal wasteway wasteway Canal drain Canal 3 490 November...... 5,440 452 4,570 8,010 24 7,740 2,480 41,610 3,080 43,160 18,900 1,520 69,410 24,830

344 OO"! May...... 4 340 108 194 3,480 99 4,670 1,290 47 4,470 2,130 69 '840 12 5 790 3,380 400 6,780 8,120 20 6,390 3,030 828

149 298 May...... 7 330

3 840

g 440 2 *800

2 250 6 440 2 760 40 May...... 8,750 141 6,380 1,760 0 4,940 3,660

'

32 '140 TRIBUTARIES ABOVE OUNNISON RIVER 45

Arapaho Creek below Monarch Lake, Colo.

Location.- Water-stage recorder, lat. 40°08', long. 105°46', in SEi sec. 15, T. 2 N., R. T77 700 feet downstream from Roaring Fork, 2J miles dovmstream from outlet of Monarch Lake, and 10 miles east of Granby. Datum of gage is 8,244.30 feet above mean sea level, datum of 1929. Drainage area.- 59 square miles. Records available.- June 1935 to September 1944. Extremes.- Maximum discharge during year, 769 second-feet June 22 (gage height, 3.02 reet); minimum daily, 5.4 second-feet Feb. 22. 1935-44: Maximum discharge, 1,380 second-feet June 22, 1938 (gage height, 4.31 feet), from rating curve extended above 900 second-feet: minimum, 2.5 second-feet Jan. 13, 1940. Remarks.- Records excellent except those for Oct. 1 to Apr. 16, which are fair. Flow partly regulated by Monarch Lake. Small diversions above station for irrigation. Several second-feet diverted around station by power canal during summer months. Staff gage at winter station read twice daily Dec. 1 to Apr. 8.

Discharge, in second-feet, water year October 1943 to Septembar 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June Jnly Aug. Sept.

1 12 18 10 8.4 6.4 5.8 5.8 13 490 440 41 19 2 12 18 10 8.4 6.7 5.9 6.1 13 462 417 48 19 3 12 17 11 9.2 7.0 6.2 6 tO 12 402 298 51 18 4 12 17 11 8.0 b7.0 6.1 6.1 12 326 383 51 16 5 12 17 11 7.5 b7.2 5.8 6.0 13 276 371 49 15 S 13 16 11 7.2 b7.4 5.7 6.3 17 258 343 48 15 7 12 16 11 7.5 b7.4 5.6 6.4 31 333 314 46 13 B 13 16 10 7.5 b7.4 5.6 6.3 32 364 284 45 13 9 13 16 11 7.2 b7.2 5.6 a6.S 32 486 269 45 12 10 13 16 11 7.5 *6.8 5.7 a7.2 35 534 251 44 12 11 13 16 11 7.5 6.4 5.8 a8.2 37 606 234 42 12 12 15 16 11 7.2 6.1 5.6 aS.O 41 542 196 41 11 13 15 16 11 7.0 6.0 5.8 a8.2 54 550 173 38 11 14 15 16 11 *6.7 5.S 5.6 a8.6 122 506 170 36 11 IS 15 *15 11 6.7 5.9 5.6 a9.0 234 506 157 36 10 16 16 15 *10 6.7 5.9 *5.6 as. 8 310 538 144 35 10 17 16 15 11 6.5 6.1 5.7 *9.8 360 49S 133 34 9.-8 in 16 15 11 6.4 5.7 5.6 9.8 288 466 130 32 9.8 19 17 14 11 6.2 5.7 5.6 9.4 224 522 124 32 9.4 20 17 14 11 6.0 5.6 5.7 9.4 213 662 127 32 9.4 21 17 13 11 6.2 5.6 5.7 9.0 213 670 130 31 9.0 2? 17 13 10 5.8 5.4 5.8 9.0 237 688 119 30 8.6 23 17 13 10 6.1 5.6 5.6 9.0 288 622 111 28 8.2 24 17 13 11 6.1 5.6 5.8 9.4 386 634 103 30 8.S 25 18 13 10 6.2 5.6 5.5 9.4 386 630 100 38 8.2 2R 19 D12 10 6.0 5.5 5.6 10 310 582 95 37 8.S 77 IS bll 9.4 5.8 5.7 5.7 11 255 526 86 35 7.8 28 18 bll S.7 6.5 5.6 5.7 11 237 470 77 31 7.8 29 IS blO 9.2 6.4 5.5 5.8 12 333 502 73 29 7.8 SO 18 blO 9.2 6.0 - 5.9 12 455 432 66 25 7.8 31 IS " 8.7 6.0 - 6.0 - 538 55 13 Second Runoff In Month feet-days Maximum Minimum Mean acre feet

December...... 323.2 11 8.7 10.4 641 Calendar year 1943 ...... 32,758.7 62& 5.6 89.7 64,970 421 ^S*7

254.0 12 5.8 8.47 Ihy...... 5,731 538 440 September...... 337.0 19 7.8 11.2 66S Water year 1943-44 ...... 30,391.1 688 5.4 83.0 60,290 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of weather records. b Stage-discharge relation affected by Ice. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 46 TRIBUTARIES ABOVE GUNNISON RIVER

Willow Creek near Granby, Colo.

Location.- Water-stage recorder, lat. 40°11', long. 106°00', In NWi sec. 34, T. 3 N., R. 77 W., 100 feet downstream from Gold Run Creek and 7 miles northwest of Granby. Datum of gage Is 8,240.99 feet above mean sea level, datum of 1929. Drainage area.- 105 square miles. Records available.- April 1935 to September 1944. Extremes.- Maximum discharge during year, 342 second-feet May 31 (gage height, 2.93 feet); minimum dally, 6.2 second-feet Jan. 16. 1935-44: Maximum discharge, 811 second-feet May 16, 1938 (gage height, 4.49 feet), from rating curve extended above 530 second-feet; minimum dally, 6 second-feet Feb. 17-24, 1938, Dec. 15, 16, 27, 1941. Remarks.- Records good except those for periods of Ice effect or no gage-height record, wnicn are fair. Water diverted above station for Irrigation of hay meadows.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 15 13 11 8.2 7.4 9.0 15 19 322 87 21 10 2 13 b!3 11 8.0 7.6 9.0 15 20 308 8S 19 11 3 13 b!4 11 7.8 7.8 9.2 17 17 303 17 9.8 4 12 bis 11 7.6 7.8 9.4 19 18 273 80 16 9.3 5 12 b!4 12 7.6 7.S 9.4 21 20 255 74 15 8.8 6 12 14 12 7.6 7.8 9.4 23 32 238 69 15 8.8 7 12 13 12 7.6 7.8 9.2 24 49 268 64 15 8.3 8 12 13 11 7.6 7.4 9.2 25 49 277 58 14 8.3 9 12 13 11 7.4 7.2 9.4 26 61 293 54 14 7.S 10 12 14 11 7.4 7.2 9.6 26 76 322 52 15 7.8 11 IS 15 11 e'.s7.2 *7.4 9.8 26 80 315 53 a!4 7.S 12 14 b!5 11 7.8 10 28 94 305 48 a!3 7.8 13 14 b!6 10 6.6 8.0 10 36 134 279 44 a!3 7.8 14 14 b!6 10 6.4 8.0 10 30 164 260 42 a!4 7.8 15 13 15 10 *6.4 8.0 10 23 189 242 42 a!5 8.3 16 13 16 9.6 6.2 8.0 11 19 206 240 40 a!4 8.8 17 13 15 9.2 eU 7.6 11 16 212 228 37 a!4 8.3 18 13 15 9.2 6.4 7.6 11 *18 173 206 36 14 7.8 19 13 14 9.2 6.4 8.0 11 15 145 195 35 16 7.4 20 14 14 9.4 6.6 8.2 11 15 152 193 49 17 7.8 21 .13 14 9.6 6.6 8.6 12 15 182 186 51 14 7.8 22 13 14 9.6 6.6 8.8 13 14 214 170 38 14 7.4 23 15 13 9.4 6.6 9.0 13 14 277 150 35 13 7.4 24 13 11 9.2 6.8 9.0 13 14 332 134 36 13 8.3 25 13 10 9.0 7.0 9.0 14 16 320 126 39 19 7.4 26 13 10 9.0 I'.l7.2 8.8 14 16 291 119 32 14 7.8 27 13 10 9.0 8.6 13 18 279 106 29 13 7.8 28 14 11'10 8.8 7.4 8.6 13 22 282 98 26 12 7.8 29 15 8.6 7.4 8.6 14 21 288 100 25 11 8.3 30 15 11 8.6 7.2 14 21 286 92 25 12 11 31 14 - 8.6 7.2 - 15 - 324 - 22 11 Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

October...... 409 15 12 13.2 811 November...... 401 16 10 13.4 795 December...... 311.0 12 8.6 10.0 617 Calendar year 1943 ...... 23,770.0 472 8.6 65.1 47,140 January...... 219.6 8.2 6.2 7.08 436 February...... 233.4 9.0 7.£ 8.05 463 March...... 345.6 15 9.0 11.1 685 April...... 608 36 14 20.3 1,210 «ay.Uav ...... 4,985 332 17 161 9,890 June ...... 6,603 32 2 92 220 13 ,100 July...... 1,486 87 22 47.9 2,950 August ...... 451 21 11 14.5 8«5 September ...... 250.5 11 7.4 8.35 497 Water year 1943-44 ...... 16,303.1 332 6.2 44.5 32,350 * Winter discharge measurement made on this day. a. No gage-height record; discharge computed on basis of 1 discharge measurement and records for stations on nearby streams. b Stage-discharge relation affected by ice. Note.- No gage-height record Nov. 7-10, Nov. 15 to Apr. 17 (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of 4 discharge measurenents and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER , 47

Fraser River near Winter Park, Colo.

Location.- Water-stage recorder, lat. 39°54'00°, long. lOS^e'SB", in NEi sec. 4, T. 2 B., R. 75 \l., li miles northwest of Winter Park and 2i miles downstream from point of diversion for Moffat tunnel. Drainage area.- 27.6 square miles. Records available.- September 1910 to September 1930 and September 1933 to September 1944 in reports of Geological Survey. September 1910 to September 1944 in reports of State engineer. Records since June 9, 1936, equivalent to earlier records if diversion to Pioneer bore of Moffat tunnel is added to flow past station. Average discharge.- 34 years, 42.4 second-feet (including diversion through Moffat tunnel;. Extremes.- Maximum discharge during year, 229 second-feet June 15 (gage height, 1.79 reetj; minimum daily, 3.6 second-feet Sept. 26. 1910-44: Maximum discharge, 820 second-feet June 13, 1918 (gage height, 2.9 feet); minimum, 2 second-feet Mar. 30, 1912. Remarks.- Records good above 15 second-feet and fair below. Small diversion through. Bercnoud Pass. Considerable portion of flow above station diverted to Moffat tunnel. Cooperation.- Records of flow diverted to Pioneer bore of Moffat tunnel furnished by State engineer.

Dischargs. In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June" July Aug. Sept. 1 4.4 5.6 D9.4 8.8 7 .4 b6 6 5 3 9.1 59 9.1 4.4 4.1 2 3.8 b!2 blO S.8 7 .4 6 7 b5 6 9.4 19 9.1 4.7 4.1 3 3.8 bll blO 8.4 b7 .0 6 7 b5 7 8.8 19 8.8 4.4 4.1 4 3.8 bll b9.4 8.0 b7 .6 6 7 b7 0 11 20 8.4 4.4 4.1 5 3.S 11 b9.1 8.4 b8 .0 6 7 9 4 10 21 8.0 4.4 4.1 6 3.S bll 9.1 8.8 7 .7 be 7 8.S 16 19 7.7 4.4 3.8 7 3.S blO 9.1 8.0 8 .0 b6 7 10 18 20 7.4 4.4 3.8 8 *3.S blO 9.1 9.1 *S .0 b6 .7 9 8 16 45 7.4 4.4 3.8 9 3.8 bll b9.4 9.1 8 .0 a6 .7 11 18 158 7.0 4.4 3.8 10 3.8 bll 9.4 8.8 8 .0 a6 8 blO 22 196 7.4 4.4 3.6 11 4.1 bll b9.1 8.0 b8 .0 a6 .8 9 1 22 189 7.7 4.4 3.8 12 4.7 *bll b8.8 * 3.8 b8 .0 a6 8 11 25 177 6.4 4.1 3.8 13 4.7 bll b8.8 3.8 b8 .0 a6 8 11 36 177 6.4 4.1 3.8 14 4.7 bll *8.8 3.8 b8 .2 *b6 2 9 8 47 184 6.1 4.4 3.8 15 4.1 bll 9.1 7.7 8 .4 6 7 9 4 58 192 6.1 4.4 3.8 16 4.1 bll b8.4 7.7 b8 .4 7 .4 11 70 192 5.8 4.7 3.8 17 4.1 bll b8.2 7.7 b8 .4 7 .0 10 57 177 5.6 5.0 3.8 18 3.8 9.8 b8.2 7.4 8 .8 6 .4 8 8 52 168 5.6 5.0 3.S 19 4.1 10 8.4 7.4 b8 .0 b7 .0 *7 4 47 180 5.6 5.S 3.8 20 4.1 11 8.0 7.4 b7 .4 7 .4 6 7 51 1S2 6.1 5.3 3.8 21 4.1 blO 8.0 7.7 b6 .4 7 .7 7 .0 54 182 5.3 5.0 3.8 22 4.1 9.8 8.0 8.0 6 .4 7 .2 6 7 65 175 4.7 4.7 3.8 23 4.4 9.8 7.7 7.7 b6 .6 6 .0 6 .4 85 14 4.7 4.7 3.8 24 4.4 9.8 7.4 7.7 b6 .6' 5 .8 6 .7 79 12 , 5.0 4.7 3.8 25 4.1 9.8 b7.6 7.7 6 .7 b5.8 7 .4 83 12 5.3 5.3 3.8 26 4.1 D9.8 b7.6 7.7 6 .7 b5.8 8 .0 78 IS 4.7 4.7 3.6 27 4.1 b9.0 b7.4 7.7 6 .7 b5 .8 9 .4 66 10 4.1 4.4 3.8 28 4.1 b8. 4 b7.4 b7.7 6 .7 b5 .8 10 71 9.8 4.1 4.4 3.8 29 4.1 bS.O b7.4 b7.6 be .6 b5 .8 10 85 9-.4 4.1 4.4 3.8 30 4.1 b9.0 bB.O b7.5 _ 5 .8 10 104 9.1 4.4 4.4 3.8 31 4.1 - 8.S b7.4 - 5 .6 - 125 - 4.1 4.4 - /i Diversion Adjusted for diversion Month Second- Moffat mean Maximum Minimum Mean Runoff in tunnel Runoff in second- foot-days acre-feet (acre-feet) acre -feet feet) October...... 126.8 4.7 3.8 4.09 252 579 831 13.5 November...... 304.8 12 5.6 10.2 605 14 519 10.4 December...... 265.1 10 7.4 8.55 526 0 526 8.55 Calendar year 1943 . . 3,520.2 42 2.8 9.64 6,980 18,580 25,550 35.3 January...... 250.3 9.1 7.4 8.07 496 0 496 8.07 February...... 218.1 8.8 6.4 7.52 433 0 433 7.52 March...... 202.6 7.7 5.6 6.54 402 0 402 6.54 April...... 258.4 11 5.3 8.61 513 0 513 8.61 May...... 1,498.3 125 8.8 48.3 2,970 18 2,990 48.6 June ...... 2,839.3 196 9.1 94.6 5,630 3,590 9,220 155 July...... 192.2 9.1 4.1 6.20 381 3,440 3,820 62.2 August ...... 142.6 5.8 4.1 4.60 283 1,030 1,310 21.3 September...... 115.3 4.1 3.6 3.84 229 497 726 12.2 Water year 1943-44 . . 6,413.8 196 3.6 17.5 12,720 9,170 21,890 30.1 » Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of weather records. b Stage-discharge relation affected by ice. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 48 TRIBUTARIES ABOVE GUNNISON RIVER

Fraser River at Qranby, Colo.

Location.- Water-Stage recorder, lat. 40°05', long. 105°57', In sec. 1, T. IN., R. 76i W., just downstream from Tenmlle Creek, half a mile southwest of Granby, and 2i miles upstream from mouth. Drainage area.- 285 square miles. Records available.- September 1937 to September 1944. August 1904 to September 1909 at site Just Delow Tenmlle Creek. Records since September 1937 equivalent to earlier records if diversion to Pioneer bore of Moffat tunnel is added to flow past station. Average discharge.- 12 years, 200 second-feet (including diversion through Moffat tunnel). Extremes.- Maximum discharge during year, 1,270 second-feet June 10 (gage height, 2.65 reet); minimum daily, 14 second-feet Sept. 22. 1904-9, 1938-44: Maximum daily discharge, 1,860 second-feet June 14, 15, 1906; minimum daily, that of Sept. 22, 1944. Remarks.- Records good except those for period of ice effect or no gage-height record, wmcn are fair. 'Cooperation.- Records of flow diverted to Pioneer bore of Moffat tunnel furnished by State engineer.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 47 52 56 38 39 32 56 134 S43 274 44 29 2 42 56 56 38 39 32 56 160 697 252 47 27 3 38 62 56 37 36 33 58 97 651 234 47 27 4 37 66 56 3S 39 34 62 95 5S9 205 41 29 5 37 64 56 37 39 34 66 117 560 193 38 27 6 37 60 60 35 39 34 76 248 488 174 38 27 7 37 56 60 36 36 34 78 300 625 157 39 23 8 36 60 60 36 35 *34 80 290 651 140 32 21 9 35 66 58 35 36 36 62 2SO 867 111 32 24 10 36 70 56 34 37 37 74 320 1,100 120 34 25 J.1 38 74 54 34 *38 37 92 330 1,020 137 27 25 12 40 78 50 35 36 37 106 330 1,020 106 26 26 13 40 #79 46 34 34 38 124 300 949 95 24 24 14 40 79 46 33 34 40 89 380 932 82 26 24 15 40 66 «46 «33 #34 «41 76 480 932 82 29 24 16 39 72 46 33 34 42 60 560 932 89 27 21 17 39 66 46 32 34 42 56 660 S43 79 26 16 18 40 74 46 32 31 42 #70 560 725 74 26 17 19 41 69- 46 33 31 42 82 500 775 62 44 19 20 41 74 48 34 si- 44 82 450 835 84 51 21 21 43 74 50 34 si 45 86 430 843 89 42 20 22 44 74 50 33 33 46 70 450 805 100 39 14 23 45 58 50 32 33 47 62 554 565 S6 37 15 24 44 60 48 33 34 47 69 619 510 79 35 15 25 44 56 46 35 35 47 89 658 499 117 49 16 26 44 54 46 35 34 45 95 613 494 86 42 17 27 45 52 44 35 32 45 120 548 382 74 37 16 28 49 50 42 35 32 46 160 543 320 62 34 19 29 52 52 42 35 #32 49 160 638 338 54 29 23 30 56 54 42 36 52 157 732 297 53 29 25 31 54 40 37 54 899 47 29 Diversion Adjusted for Observed to diversion Month Second- Moffat Maximum Minimum Mean Runoff In tunnel Runoff In ( second - foot-days acre-feet laere-feet) acre -feet feet) Octo ber...... 1,300 56 35 41.9 2,560 1,210 3,790 61.7 Move 1,927 79 50 64.2 3,820 28 3,850 64.7 Decenber...... 1,550 60 40 50.0 3,070 0 3,070 5,0.0 Calendar year 1943 . . 57,679 1,070 32 158 114,400 32,660 147,100 203 Janu 1,077 38 32 34.7 2,140 0 2,140 34.7 Febr 1,010 39 31 34.8 2,000 0 2,000 34.8 Maro 1,268 54 32 40.9 2,520 0 2,520 40.9 Apri 1...... 2,593 160 56 86.4 5,140 0 5,140 S6.4 May. 13.275 899 95 428 26,330 18 26,350 429 June 21,087 1,100 297 703 41,830 4,750 46,580 783 July 3,597 274 47 116 7,130 7,030 14,160 230 Augu St...... 1,100 51 24 35.5 2,180 2,220 4,400 71.5 Sept 656 29 14 21.9 1,300 1,130 2,430 40.8 Hater year 1943-44 . . 50,440 1,100 14 138 100,000 16,390 116,400 160

May 7-21; discharge computed on basis of records for stations on nearby streams. Stage-discharge relation affected by Ice Nov. 15-18, Hov. 26 to Dec. 24, Jan. 15 to Hay 5. No gage-height record Dec. 25 to Jan. 14 (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of weather records a records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 49

Vasquez Creek near Winter Park, Colo.

Location.- Water-stage recorder, lat. 39°55'15", long. 105°47'05", in NWi sec. 33, T. 1 s., K. 75 W., a quarter of a mile upstream from mouth, It miles downstream from Moffat tunnel diversion, and 2t miles northwest of Winter Park. Datum of gage Is 8,768.48 feet above mean sea level, unadjusted. Drainage area.- 27.8 square miles. Records available.- June 1907 to October 1909, August 1934 to September 1944. Records since my '&>, 1937, equivalent to earlier records If diversion to Pioneer bore of Moffat tunnel Is added to flow past station. Average discharge.- 10 years (1934-44), 33.2 second-feet (Including diversion through nor rat; 'cunnei). Extremes^- Maximum discharge during year, 152 second-feet June 16 (gage height, 1.97 reetJT no flow Sept. 9-24. 1934-44: Maximum discharge, 396 second-feet June 15, 1935 (gage height, 2.64 feet); no flow Sept. 9-24, 1944. Remarks.- Records good except those for period of Ice effect, which are fair. Cooperation.- Records of flow diverted to Pioneer bore of Moffat tunnel furnished by treats engineer.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.5 3.9 3.4 s.o 6 0 6 0 6.0 5.8 109 2.8 2.7 0.6 2 1.4 6.0 9.4 5.0 5 .8 6 0 6 0 6.0 109 2.0 2.8 .6 3 1.4 7.6 9.0 3.0 5 .5 6 .0 6 0 7.0 115 l-.S 2.7 .6 4 1.4 9.2 S.6 5.0 5 6 6 0 6 7 7.0 113 1.6 2.5 .3 5 1.5 9.2 9.0 S.Q 6 0 5 8 7 6 7.0 103 1.6 2.5 .1 6 1.5 9.0 9.6 S.O 6 .0 5 S e 0 7.6 101 1.5 2.5 .2 7 1.6 6.6 10 3.0 6 3 6 0 6 3 3.6 105 1.2 2.5 .2 8 *1.6 6.6 10 3.0 7 .0 6 0 6 3 7.6 107 .9 2.3 .2 9 1.6 8.6 9.3 i3.0 6 7 6 0 e 6 9.3 115 1.0 2.7 0 10 1.6 8.8 9.4 7.6 6 7 6 0 7 3 12 140 1.4 2.5 0 11 1.3 9.2 9.2 7.6 6 7 6 0 6 3 10 142 1.6 2.3 0 12 1.9 *9.4 9.4 7.3 6 7 5 8 6 0 14 138 1.5 , 2.2 0 13 1.9 9.0 9.4 7.3 6 7 6 0 5 5 26 128 1.2 2.2 0 14 1.9 9.0 9.3 7.3 6 7 6 0 6 3 33 135 1.0 2.2 0 15 1.9 3.8 S.6 7.3 .6 7 5 8 5 8 41 133 .9 2.0 0 16 1.8 8.6 3.6 7.3 6 3 5 8 6 3 55 148 .9 .7 0 17 1.8 6.6 3.6 7.3 6 .3 5 8 6 7 43 133 .7 .7 0 18 1.6 S.8 8.3 7.3 6 3 5 8 7 6 29 122 .6 .6 0 19 1.6 9.0 3.6 7.3 6 3 6 3 5 3 29 126 .6 .9 0 20 1.8 9.0 S.6 7.0 6 3 6 7 5 8 31 124 .7 .7 0 21 1.9 8.8 8.6 7.0 6 3 7 3 5 8 41 128 .4 .6 0 22 2.3 8.6 3.3 7.0 6 3 6 3 5 8 55 131 .9 .6 0 23 1.8 8.6 e.s 7.0 6 3 6 3 5 5 70 120 2.6 .6 o0 24 2.2 8.3 8.3 3.7 6 3 6 3 5 5 70 115 3.0 .7 25 2.5 9.0 6.3 6.5 6 3 6 3 .5 5 89 117 3.2 .9 .1 26 2.2 8.8 3.3 iJ»3 6 0 6 3 5 e 89 nr 2.6 .7 .1 27 2.0 8.4 8.3 3.3 6 0 6 3 6 0 83 83 2.7 .6 .4 28 1.6 7.4 S.O (3.3 6 0 6 3 6 3 79 17 2.7 .6 1.2 29 1.6 7.6 8.0 3.3 6 0 6 3 6 3 91 6.3 2.7 .6 1.2 30 1.6 8.0 8.3 (3.3 6 5 6 0 103 3.7 2.7 .7 .3 31 2.0 - 8.0 6.0 6 5 122 - 2.7 .7 - Divers ion Adjusted for Observed to diversion Month Second Moffat Mean Maximum Minimum Mean Runoff in tunnel Runoff in second- foot-days a ere -feet (acre-feet) acre-feet feet) October...... 54.6 2.5 1.3 1.76 108 635 743 12.1 November...... 252.9 9.4 3.9 3.43 502 14 516 S.66 December...... 272.5 10 8.0 6.79 540 0 540 6.79 Calendar year 1943 . . 7,433.3 231 .2 20.4 14,740 14,070 23,310 38.9 January...... 224.1 8.0 6.0 7.23 444 0 444 7.23 February...... 162.3 7.0 5.5 §.29 362 0 362 6.29 March...... 189.9 7.3 5.8 6.13 377 0 377 6.13 April ...... 184.3 7.6 5.3 6.14 365 0 365 6.14 May...... 1,239.9 122 5.8 41.6 2,560 0 2,560 41.6 June ...... 3,239.0 143 110 6,520 1,170 7,690 129 July...... 52.1 3.2 .4: 1.68 103 3,590 3,690 60.1 August ...... 47.5 2.3 .6 1.53 94 1,190 1,280 20.9 September...... 6.1 1.2 0 .20 12 631 643 10.6 Water year 1943-44 . . 6,045.0 148 0 16.5 11,990 7,230 19,210 26.5 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by Ice Nov. 1 to Dec. 13. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 50 TRIBUTARIES ABOVE GUNHISGN RIVER

St. Louis Creek near Fraser, Colo.

Location.- Water-stage recorder, lat. 39°54'45", long. 105°52'35", in sec. 34, T. 1 S., R. 76 W., a third of a mile downstream from confluence of East and West Branches and 4i miles southwest of Fraser. Drainage area.- 3C.8 square miles. Records available.- August 1934 to September 1944. Average discharge.- 10 years, 36.2 second-feet. Extremes.- Maximum discharge during year, 271 second-feet June 21 (gage height, 2.29 feet), from rating curve extended above 220 second-feet; minimum daily, 8.8 second- faet Mar. 31, Apr. 1, 2. 1934-44: Maximum discharge, 353 second-feet June 15, 1935 (gage height, 2.58 feet), from rating curve extended above 220 second-feet; minimum, 3.2 second-feet Apr. 9, 1935 (gage height, 0.75 foot). Remarks.- Records good except those for period of ice effect or no gage-height record, wnicn are rair. No regulation or diversion.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 19 IS ms 10 9.7 9.6 8.8 9.7 108 151 44 18 2 16 b!6 15 10 9.8 9.6 8.8 9.7 108 146 44 , 18 3 15 b!5 14 10 9.8 9.6 9.0 9.8 106 141 43 18 4 15 b!5 13 10 9.7 9.4 9.4 10 97 134 40 17 5 15 15 13 10 9.7 9.4 10 10 86 132 38 17 6 15 b!5 12 10 9.7 9.4 9.4 13 89 127 38 17 7 15 b!4 12 10 9.8 9.4 9.0 15 102 114 37 17 8 15 b!4 12 10 9.7 9.4 9.0 14 110 110 34 16 9 15 blS 12 10 9.7 9.4 9.4 14 141 104 34 16 10 15 b!6 12 10 9.6 9.6 10 17 167 102 34 16 11 15 17 11 10 9.6 9.6 9.8 16 172 98 31 15 12 15 »15 11 10 9.6 9.6 9.4 21 164 89 30 15 13 16 15 11 9.9 9.6 9.4 9.0 31 162 84 29 15 14 16 14 11 9.9 9.8 9.4 9.2 36 169 79 SB 15 15 15 15 12 10 10 9.6 9.2 44 180 75 28 15 16 16 16 11 10 10 10 9.2 54 198 71 28 15 17 16 b!5 11 10 10 9.4 9.6 46 195 66 26 14 18 15 14 11 9.9 9.8 9.2 10 32 182 62 26 14 19 15 14 11 9.9 9.6 9.8 10 29 204 63 30 14 20 14 15 11 9.9 9.4 10 *9.9 33 223 62 26 14 21 15 t>16 11 9.9 9.4 10 9.8 38 229 57 24 14 22 15 14 11 9.8 9.4 10 9.5 47 220 54 23 14 23 14 11 9.8 9.4 9.4 9.5 60 201 51 23 14 24 b!4 12 11 9.6 9.6 9.0 9.7 73 206 57 23 14 25 15 12 11 9.8 9.6 9.0 9.6 71 204 60 27 14 26 14 M2 11 9.8 9.6 9.0 9.7 64 198 51 23 14 27 14 bll 11 9.8 9.8 9.0 9.8 58 180 49 21 14 28 14 bll 11 9.8 9.8 9.0 9.9 66 175 47 20 14 29 14 bll 11 9.7 9.8 9.0 9.7 80 172 47 20 14 30 14 b!2 11 9.7 _ 9.0 9.8 95 164 46 20 14 31 14 ~ 11 9.7 - 8.8 106 44 19 Seconfl- Runoff in Month foot-days Maximum Minimum Mean acre- feet

October ...... 465 19 14 15.0 922 November ...... 423 17 11 14.1 839 December ...... 360 15 11 11.6 714 Calendar year 1943 ...... 15,273.9 248 6.2 41.8 30,300 January ...... 307.1 10 9.7 9.91 609 February ...... 281.0 10 9. ^ 9. 69 557 March...... 29C.O 10 8. E 9. 42 579 April...... 285.1 10 8.8 9 '.50 565 May...... 1,222.2 106 9.7 164*39«4 2,420 June ...... 4,912 229 4486 ' 9 740 July ...... 2,573 151 83.0 5)lOO August ...... 911 44 19 29.4 1,810 September...... 456 18 14 15.2 904 Water year 1943-44 ...... 12,487.4 229 8.8 34.1 24,760 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- No gage-height record Oct. 1-7, Feb. 10 to Apr'. 19; discharge computed on basis of weather ecords and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 51

Ranch Creek near Fraser, Colo.

Location.- Water-stage recorder, lat. 39 055'15lt , long. 105°47'05", In NWJ sec. 22, T. 1 S., R. 75 W., 150 yards downstream from South Fork and 3 miles east of Fraser. Drainage area.- 19.9 square miles. Records available.- August 1934 to September 1944. Average discharge.- 10 years, 21.0 second-feet. Extremes.- Maximum discharge during year, 176 second-feet June 9 (gage height, 2.68 reet); minimum daily, 2.9 second-feet Mar. 13. 1934-44: Maximum discharge, 299 second-feet June 15, 1935 (gage height, 3.37 feet); minimum dally, 1.5 second-feet (estimated) Feb. 3-7, Mar. 18-21, 1935. Remarks.- Records excellent except those for Oct. 1 to Feb. 29, Sept. 1-30, which are fair. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. - Feb. Mar. Apr. May June July Aug. Sept.

1 .2 b4.2 b!5.4 .3 3. 3.1 3.0 4.4 « 99 74 10 5.6 2 .2 b4.0 b3.8 .3 3.< 3.1 3.0 4.4 99 72 11 S.4 3 .0 b4.3 b3.6 .3 3. 3.1 3.1 4.1 96 63 9.8 5.4 4 .8 b4.3 b3.7 .3 3.' 3.1 3.5 4.1 84 58 9.5 4.8 5 .5 4.3 b4.1 .1 3. 3.1 4.0 5.0 76 55 9.2 4.6 6 .5 4.4 b4.5 .1 3. 3.1 3.8 7.2 76 50 9.0 4.5 7 < .5 b4.2 b4.7 .1 5. 3.1 3.3 7.8 88 43 8.8 4.6 8 .4 b3.9 b4.6 ' .1 3.< 3.1 3.4 6.6 92 36 8.5 4.6 9 .5 4.3 .4 .1 3.< 3.1 3.7 B.C 120 31 8.5 4.5 10 .5 4.3 .4 .1 3. 3.1 3.4 9.8 155 33 8.0 4.4 11 .6 4.1 .5 .1 3. 3.0 3.5 9.0 144 31 7.6 4.5 12 .1 4.1 '. .E .1 3. 3.0 4.0 12 134 29 7.4 4.5 13 .0 *4.1 .5 .1 3. 2.9 4.0 18 125 23 7.0 4.5 14 .1 4.0 .6 .1 3. 3.0 3.7 22 124 22 7.0 4.5 Ib .6 3.9 * .5 .1 3. 3.1 3.5 29 131 22 7.0 4.5 16 .5 3.8 .1 .1 3. 3.0 3.5 39 135 20 7.0 4.S 17 .8 3.8 .1 .1 3. 3.0 3.5 36 128 18 6.6 4.3 IB .3 3.9 .1 ' .1 3. 3.0 3.9 27 126 16 6.6 3.9 19 .3 3.9 '. .3 < .0 3. 3.0 3.5 23 132 16 8.8 3.9 20 .9 3.9 .3 .0 3. 3.0 3.5 24 140 IB 7.6 4.0 21 .5 3.8 .3 .9 3. 3.0 3.5 27 137 IS 6.6 3.9 22 .5 3.9 '. .1 .9 3. 3.0 3.5 34 132 16 6.4 4.0 23 .4 3.9 .1 .9 3. 3.0 3.4 49 122 14 6.2 3.9 24 .8 3.9 .1 .9 3.< 3.0 3.4 54 119 16 7.4 3.8 25 .1 3.8 .1 .9 3. 3.0 3.4 56 109 20 8.2 3.8 26 .1 3.9 .1 .8 3.3 3.0 3.5 52 104 16 6.4 3.9 27 . .3 3.9 .1 .9 3.2 3.1 4.1 47 93 16 6.2 3.8 28 .3 3.9 .1 .8 3.2 3.1 4.8 52 88 15 6.2 3.9 29 .4 b3.4 .1 .8 3.1 3.1 5.1 62 84 14 6.0 3.9 30 .4 b3.? .3 .7 - 3.1 4.4 81 79 13 6,0 4.0 31 .3 - .3 .5 - 3.1 - 96 - 11 6.0 -

Second- Runoff in Month f6ot-days Maximum Minimum Mean aore-feet 6.2 282 Decembe r ...... 130.4 > 4.7 3.4 4.21 259 Calendar year 1943 ...... 7,198.3 138 2.4 19.7 14,270

3 41 94.5 2.9 218 May...... 910.6 96 4.1 29.4 1,810 76 6,690 899 11 29.0 September...... 130.3 5.6 3.8 4.34 258 Water year 1943-44 ...... 6,367.4 155 2.9 17.4 12,630 * Winter discharge measurement made on this day. b Stape-rtischarce relation affected by ice. Time basis; Mountain war time. To convert war time to standard time, ubtract 1 hour. 52 TRIBUTARIES ABOVE GUN1JISOM RIVER

Ranch Creek near Tabernash, Colo.

Location.- Water-stage recorder, lat. 39°59'55", long. 105°49'10", In sec. 6, T. 1 S., R. 75 W., a quarter of a mile upstream from Meadow Creek and li -miles east of Tabernash Datum of gage Is 8,338.01 feet above mean sea level, unadjusted. Drainage area.- 50.7 square miles. Records available.- September 1934 to September 1944. Average discharge.- 10 years, 39.9 second-feet. Extremes.- Maximum discharge recorded during year, 248 second-feet June 20, but probably higher June 10; maximum gage height, 3.98 feet Jan. 19 (Ice jam); minimum daily dls- charge, 2.5 second-feet Feb. 9. 1934-44: Maximum discharge, 506 second-feet.June 15, 1935 (gage height, 4.40 feet), from rating curve extended above 250 second-feet; no flow Feb. 15 to Mar. 13, 1937. Remarks.- Records excellent except those for periods of ice effect or no gage-height record, which are poor. Several small diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. Hay June July Aug. Sept.

1 13 9.5 6.4 3.6 3.6 5.2 10 22 165 107 IS 9.0 2 11 7.4 6.8 3.S, 3.5 5.4 10 22 160 104 19 S.O 3 10 7.2 6.6 4.0 3.8 5.6 12 22 145 94 17 ' S.O 4 9.5 9.0 .0 3.6 3.7 6.0 13 20 130 84 16 8.0 5 9.1 11 .6 3.3 4.0 6.2 14 25 120 80 14 7.4 6 9.1 11 .S 3.5 4.2 6.0 13 35 125 69 14 7.0 7 8.7 9.5 .8 3.9 4.3 5.4 13 34 140 62 13 6.6 8 S.7 9.0 .5 3.9 3.3 5.0 14 30 160 52 13 6.5 9 6.7 9.8 6.S 3.7 *2.5 6.4 15 29 200 48 13 6.5 10 3.7 11 6.4 3.5 5.4 8.0 14 33 240 48 12 6.5 11 8.7 13 6.0 3.5 5.8 7.S 14 36 220 50 11 6.4 12 10 14 6.0 3.6 4.9 8.0 15 37 200 43 10 6.4 13 10 *14 6.0 *4.1 4.0 8.0 16 53 190 40 9.6 6.4 . 14 11 12 6.0 4.3 3.8 8.2 16 69 180 35 10 6.4 15 10 11 *5.9 4.4 3.6 *8.4 15 87 190 36 10 6.4 16 10 10 5.8 3.9 3.4 9.0 15 115 200 34 9.0 6.2 17 10 9.4 5.5 3.7 3.2 9.2 15 113 187 30 9.0 5.8 18 10 9.0 5.5 3.8 3.2 8.4 17 99 194 27 8.5 5.6 19 9.5 3.6 5.6 3.9 3.3 8.0 16 83 203 -87 14 5.5 20 9.1 8.6 5.8 4.1 3.4 8.2 *16 74 212 29 13 5.5 21 8.3 8.6 5.8 4.2 3.7 8.4 19 79 210 29 10 5.5 22 9.1 8.8 5.6 4.2 4.2 9.0 19 90 196 27 9.6 5.5 23 10 8.8 5.2 4.2 3.9 8.4 IS 118 180 25 8.5 5.5 24 9.1 9.0 5.2 4.2 4.0 7.8 19 131 178 27 11 5.5 25 9.5 8.8 5.1 4.1 4.6 8.2 20 134 162 36 17 5.5 26 9.1 8.2 4.2 3.9 4.6 8.2 22 1S1 156 23 13 5.5 27 6.7 7.2 3.1 3.6 4.6 7.6 24 116 139 24 10 5.5 28 9.1 6.6 2.8 3.4 4.6 7.2 28 125 131 22 10 5.5 29 9.5 6.4 3.1 3.2 4.6 8.2 30 135 134 21 10 5.5 30 9.5 6.4 3.4 3.3 _ 9.2 32 150 116 20 10 6.0 31 10 - 3.5 3.6 - 10 - 165 - 19 9.6 -

Seccnd- Runoff in Month f cot-days Maximum Minimum Mean acre-feet October...... 296.7 13 8.2 9.57 588 November...... 282.8 14 6.4 9.43 561 December ...... 175.8 7.8 2.E 5.67 349 Calendar year 1943 ...... 14,964.4 276 2.E 41.0 29,680 January ...... 118.0 4.4 3.2 3.81 234 February...... 115.7 5.8 2.5 3.99 229 March...... 234.6 10 5.0 7.57 465 April...... 515 32 10 17.2 1,020 Hay 2,402 165 20 77.5 4,760 June ...... 5,163 240 116 172 10,240 July 1,377 107 19 44.4 2,730 August ...... 371.8 19 8.5 12.0 737 September 189.5 9.0 5.5 6. 32 376 Water year 1943-44 ...... 11,241.9 240 2.5 30.7 22,290 Winter discharge measurement made on this day. Mote.- No gage-height record May 28 to June 16, Sept. 5-26; discharge computed on basis of records for stations on nearby streams. Stage-discharge relation affected by ice Nov. 2-4, Nov. 6 to Apr. 19, Apr. 26-30 (no gage-height record Nov. 10-12, Dec. 29 to Jan. IS, Feb. 19 to Apr. 19; discharge computed on basis of 1 discharge measurement and weather records). Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE OTNNISON RIVER 53 Neadow Creek near Tabernash, Colo.

Location.- Water-stage recorder, lat. 40°02'55", long. 105°46'30", In sec. 15, T. 1 N., R. 7b W., 5 miles northeast of Tabernash. Drainage area.- 7.0 square miles. Records available.- May 1936 to September 1944 (no winter records 1941-44). Extremes.- Maximum discharge during year, 244 second-feet June 9 (gage height, 3.72 feet), rrom rating curve extended above 85 second-feet; minimum not determined. 1936-44: Maximum discharge, that of June 9, 1944; probably no flow at times during Ice periods. Remarks.- Records good except those for periods of no gage-height record; which are poor. NO aiversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Daj Oct. Ncv. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.6 1.6 SO 22 2.7 1.0 2 1.2 1.0 70 21 2.8 .9 3 1.0 1.1 63 20 2.4 .9 4 .9 1.4 52 IS 2.2 .9 5 .9 1.6 47 18 2.1 .9 6 .9 1.5 63 16 2 2 .9 7 .8 1.2 SI 14 2^1 .7 8 .S 1.0 97 13 2.0 .7 9 .3 1.3 144 12 2.0 .7 10 .S 1.5 139 12 2.0 .7 11 .S 1.6 111 11 1.6 .7 12 1.2 *1.6 92 9.S 1.5 .7 13 1.4 . 82 8.7 1.4 .7 14 1.5 . 75 7.7 1.2 .6 15 1.2 - 76 7.5 1.3 .7 16 1.4 _ > 0.5 71 7.5 1.3 1.6 . ; 17 64 6.5 1.3 18 1.6 - 63 6.3 1.2 .' 19 1.5 _ 68 6.5 l.S ^i 20 1.0 - 71 7.5 1.3 . 21 1.2 _ (*) 61 7.0 1.3 .6 Z2 1.0 -. 54 6.0 1.2 .6 23 1.0 - («> 49 5.2 1.1 .6 24 1.0 - 47 5.4 1.5 .6 25 1.0 - 43 6.3 2.2 .6 26 1.0 . 43 5.2 1.6 .6 27 1.1 . 34 4.0 1.3 .6 28 1.3 ~ 30 3.5 1.1 .6 29 1.3 - 36 3.2 1.0 .6 30 1.0 - 26 2.B 1.1 .6 31 1.0 ~ - - 2.7 1.0 Second- Runoff in Month foe t-days Maximum Minimum Mean acre-feet

October...... 34.8 1.6 O.s 1 12 69 November 1-12...... 16.4 1.6 1.0 1«57 33 December...... Calendar year ...... January ~ ~ February...... 1 .... _ w March...... ~ April...... 15 _ .5 30 Mayma.y ...... 930 _ _ 30 1,840 June ...... 2,032 144 26 67. t 4,030 July...... 296. S 22 2.7 9.57 589 August ...... 51.3 2.B 1.0 1.65 102 September...... 21.2 1.0 .6 .71 42 Water year ...... - - - - - » Winter discharge measurement made on this day. Note.- No gage-height record Nov. 2-12, Apr. 1 to June 2 (stage-discharge relation probably affected by ice during most of period)} discharge computed on basis of 3 discharge measurements, weather records, and records for Arapaho Creek below Monarch Lake. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. 54 TRIBUTARIES ABOVE OUNNISON RIVER

Strawberry Creek near Granby, Cglo.

Location.- Water-stage recorder, lat. 40°05'10", long. 105°49'30", In SWiSWi sec. 32, T. 2~U77~R. 75 W., 0.6 mile downstream from Little Strawberry Creek and 6 miles east of Granby. Drainage area.- 12.6 square miles. Records available.- May 1936 to September 1944 (no winter records). Extremes.- Maximum discharge during year, 73 second-feet May 30 (gage height, 1.94 feet); no now Sept. 19-28 and probably at times during winter. 1936-44: Maximum discharge, 132 second-feet May 29, 1938 (gage height, 2.91 feet), from rating curve extended above 110 second-feet; no flow at times In August, September, November 1939, Sept. 7, 1940, September 1944, and probably at times during extremely cold weather In each year. Remarks.- Records poor except those for May 22 to July 25, which ?re good. Two diversions above station for Irrigation.

Discharge, in second feet. water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.6 0.7 1.4 60 7.1 0.3 0.3 2 .6 .7 1.5 53 9.8 .3 .3 3 .6 .6 1.6 44 14 .4 .3 4 .6 .6 1.6 41. 12 .3 .3 5 .6 .6 1.8 39 12 .3 .3 6 .6 .5 2.S 31 10 .3 .3 7 .6 .5 4.4 31 8.9 .3 .3 R .5 .4 5.4 28 7.4 .3 .2 9 c o .5 5.6 28 7.7 .3 .1 10 .n .5 6.0 26 6.3 .3 ,1 11 .6 .5 6.4 22 4.7 .4 .1 12 .6 .6 7.0 20 4.0 .4 .1 13 .6 .6 8.0 17 3.3 .4 .1 14 .6 .6 9.2 19 2.7 .4 .1 15 ,6 .6 13 17 2.2 .5 .1 16 .5 .6 20 8.6 1.6 .5 .1 17 .6 .6 45 7.7 1.2 .5 .1 18 .6 .6 44 6.0 1.1 .4 .1 19 .6 .6 42 3.3 1.2 .6 0 20 .6 .6 40 2.4 1.6 .8 0 2.1 .7 .6 41 3.8 1.0 .4 0 ?? .7 .6 43 14 .5 .3 0 23 .7 .6 44 14 .3 .3 0 ?A .7 .6 48 13 .3 .3 0 25 .7 .6 . 50 12 .9 1.1 0 26 .7 .5 48 10 .5 .5 0 27 .7 .4 46 10 .9 .3 0 28 .7 .4 52 8.9 1.4 .3 0 29 .7 .4 54 12 v l ' 1 .3 .1 30 .7 .5 62 7.7 ^ .9 .3 .1 31 .7 - 64 .3 .3 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

______April ...... _ _ _ _ _ 64 609.4 60 2.1 30.3 1,210 14 4.09 252 12.4 1.1 .3 .40 25 September ...... 3.5 .3 0 .12 6.9 Water year ...... - - - - -

record Oct. 37 to Nov. 30, May 1-21; discharge computed on basis of 2 discharge weather records, and records for stations on nearby streams. Time baa Is! Mountain war time. To convert war time to standard time, subtract 1 hour TRIBUTARIES ABOVE GUNNISON RIVER 55

Williams River near Leal, Colo.

Location.- Water-stage recorder, lat. 39°50', long. 106°03', in sec. 31, T. 2 S., R. 77 w., .lust downstream from Kinney Creek and 2 miles north of Leal. Drainage area.- 85.9 square miles. Records available.- October 1933 to September 1944 in reports of Geological Survey. July 1933 to septemoer 1944 in reports of State engineer. Records since my 10, 1940, equivalent to earlier records if flow through Jones Pass tunnel is added to flow past station. Averagetunnel). discharge.- 11 years, 102 second-feet (including diversion through Jones Pass

Extremes.- Maximum discharge during year, 1,040 second-feet June 21 {gage height, 3.35 reet;; minimum daily, 17 second-feet Mar. S-16, 19, 22, 25, Apr. 1-3. 1933-44: Maximum discharge observed, 1,530 second-feet June 21, 1938 (gage height, 3.81 feet); from rating curve extended above 1,000 second-feet; minimum daily, 13 second-feet Dec. 28, 29, 1939. Remarks.- Records excellent except those for Nov. 18 to Mar. 15, which are good. Cooperation.- Records of diversion through Jones Pass tunnel furnished by State engineer.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 38 38 24 21 20 18 17 23 331 442 58 32 2 37 31 25 21 20 18 L7 23 319 - 426 57 31 3 35 36 24 21 20 18 7 21 296 396 54 30 4 34 38 24 D20 21 18 L8 21 271 372 51 29 5 34 39 25 b20 21 18 18 26 233 271 51 29 6 34 37 25 21 21 18 20 34 238 251 51 29 7 35 36 25 D20 21 18 L8 41 285 233 49 28 8 36 36 25 320 30 18 !20 37 285 216 46 28 9 35 36 25 21 31 17 £21 43 347 202 46 27 10 35 35 24 21 21 17 18 52 450 194 45 27 11 36 35 24 20 21 17 20 51 515 190 43 27 12 38 35 24 20 * 31 17 21 62 477 171 42 26 13 38 34 24 20 30 L7 't22 103 459 162 42 26 14 40 34 24 20 20 L7 £30 140 495 147 42 26 15 40 32 23 20 * 20 17 20 173 540 140 42 25

16 45 32 23 20 b!9 17 19 221 620 132 41 26 17 44 32 *22 *20 20 a 18 9 214 5S5 118 40 25 18 44 32 22 20 19 18 L9 145 565 111 42 26 19 44 30 23 20 L9 17 £30 112 625 111 49 27 20 41 29 23 20 19 18 19 114 724 124 45 27 21 39 28 24 20 16 18 20 128 7 73 116 39 26 22 42 28 23 20 L9 17 20 165 766 102 39 27 23 41 28 23 20 L9 L8 20 226 664 95 37 27 24 39 27 23 20 L9 18 i20 254 689 105 39 27 25 41 26 22 20 19 17 20 249 656 120 51 27 26 42 23 23 20 19 18 20 228 G56 91 39 27 27 40 23 b22 20 L9 _ 18 £21 211 565 78 36 £7 28 42 25 23 20 L8 L8 ;24 223 515 72 34 27 29 41 23 23 20 L8 L8 23 268 510 69 34 27 30 39 23 22 20 _ 18 22 310 4C6 68 35 27 31 33 - 22 20 - 18 - 325 - 61 33 - Diversion Adjusted for Observed by diversion Month Second- Jones Pass Mean Maximum Minimum Mean Runoff in tunnel Runoff in (second- foot days acre -feet (acre-feet) acre -feet feet) October...... 1,208 45 34 39.0 2,400 0 2,400 39.0 November...... 941 39 1 23 31.4 1,870 0 1,870 31.4 December...... 728 25 22 23.5 1,440 0 1,440 23.5 Calendar year 1943 . . 36,498 828 17 100 72,390 4,060 76,450 106 January...... 626 21 20 20.2 1,240 0 1,240 20.2 February ...... 572 21 18 19.7 1,130 0 1,130 19.7 March...... 547 18 17 17.6 1,080 0 1,080 17.6 April ...... 593 24 17 19 '.8 1,180 0 1,180 19.8 way.Ma v ...... 4,243 325 21 137 8,420 0 8,420 137 June...... 14,965 778 233 499 29,680 0 29,680 499 July...... 5,386 442 61 174 10,680 2,850 13,530 220 August...... 1,352 58 33 4316 2,680 859 3,540 57.6 September...... 820 32 25 27.3 1,630 152 1,780 29.9 Water year 1943-44 . . 31,981 778 17 87.4 §3 , 430 3,860 67,290 92.7 » Winter1 discharge measurement made on this day. b Stage-dischargedischarge relationi.-cj.ai/j.un ot±±cwcuaffected by\jy J.UD.ice. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 56 TRIBUTARIES ABOVE GUNNISON RIVER

Williams River near Parshall, Colo.

Location.- Water-stage recorder, lat. 40°00', long. 106°11', In SE£ sec. 36, T. 1 N., RT~7g~W., 24 miles upstream from Battle Creek and 4 miles south of Parshall. Datum of gage is 7,805.00 feet above mean sea level, unadjusted. Drainage area.- 186 square miles. Records available.- July 1904 to September 1924 and October 1933 to September 1944 in reports or ueoioglcal Survey. July 1904 to September 1924 and June 1933 to September 1944 In reports of State engineer. Records since May 10, 1940, equivalent to earlier records if flow through Jones Pass tunnel is added to flow past station. Average discharge.- 31 years (1904-24, 1933-44), 157 second-feet (Including diversion tnrougn jones pass tunnel). Extremes.- Maximum discharge during year', 922 second-feet June 22 (gage height, 3.15 reet;; minimum daily, 17 second-feet Aug. 23, Sept. 10-12. 1904-24, 1933-44: Maximum discharge observed, 2,570 second-feet June 14, 1918 (gage height, 6.0 feet, site and datum then in use), from rating curve extended above 1,400 second-feet; a higher discharge probably occurred June 15 when gage was de­ stroyed; minimum daily, 10 second-feet Sept. 15-17, 1934. Remarks.- Records good except those for periods of ice effect, which are fair. Diversions aoove station for irrigation. Cooperation.- Records of diversion by Jones Pass tunnel furnished by State engineer.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 48 52 37 34 33 28 34 47 546 464 52 21 2 47 41 47 36 32 29 30 52 522 447 52 20 3 41 52 41 33 30 30 32 44 498 415 50 20 4 37 57 41 36 31 28 33 41 458 390 48 20 5 36 54 43 33 32 30 38 48 405 276 46 19 6 36 50 48 35 32 30 40 72 390 230 55 IS 7 30 44 50 37 33 28 35 104 464 205 62 IS 8 21 64 47 30 30 25 36 93 510 174 59 IS 9 21 54 42 29 31 29 39 95 558 155 57 18 10 20 54 44 31 31 30 3£ 130 648 140 56 17 11 21 55 45 32 30 27 41 128 696 135 52 17 12 22 51 36 30 «2S 29 44 138 660 115 48 17 13 23 52 38 32 30 29 48 177 606 102 46 28 14 25 47 46 33 28 30 43 219 630 91 45 38 15 26 48 42 34 30 27 40 248 636 82 . 44 35 16 35 50 43 36 24 28 38 298 714 79 44 21 17 44 50 *45 *34 26 «29 38 335 684 70 43 21 18 42 51 46 35 26 27 37 219 636 64 30 21 19 40 48 *47 37 26 26 39 174 672 57 24 23 20 36 47 48 37 26 28 38 167 733 64 23 24 21 33 47 48 35 26 29 39 184 785 66 21 26 22 36 50 45 36 30 28 *36 216 798 57 19 30 23 36 46 43 35 28 30 37 294 726 50 17 30 24 33 46 45 34 28 31 37 395 714 51 IS 31 25 36 45 42 33 31 30 38 390 684 74 31 31 26 36 39 43 32 29 28 39 365 672 50 23 3jl 27 35 32 40 33 28 29 43 330 618 41 21 31 28 35 38 36 29 29 28 51 350 552 37 20 31 29 37 34 39 31 27 30 47 436 564 60 20 33 3031 37 32 40 31 _ 34 48 504 528 89 21 33 42 37 32 - 35 - 540 - 75 21 - Diversion Adjusted for Observed by diversion Month Jones Fas a Second- He an Maximum Minimum Mean _n acreRunoff -feet in tunnel Runoff in (second- foot-days acre-feet) acre-feet feet) October...... 1,047 48 20 33. 8 2,080 0 2,080 33.8 November...... 1,430 64 32 47.7 2,840 0 2,840 47.7 December...... 1,334 50 36 43.0 2,650 0 2,650 43.0 Calendar year 1943 . . 45,018 735 20 123 89,300 4,060 93,360 129 January...... 1,040 38 29 33.5 2,060 0 2,060 33.5 February...... , 845 33 24 29.1 1,680 0 1,680 29.1 March ...... 899 35 25 29.0 1,7SO 0 1,780 29.0 April...... 1,173 51 30 39.1 2,330 0 2,330 39.1 May...... 6,333 540 41 220 13,550 0 13,550 220 June ...... 18,307 798 390 610 36,310 0 36,310 610 July...... 4,405 464 37 142 8,740 2,350 11,590 188 August ...... 1,168 62 . 17 37.7 2,320 359 3,180 51.6 September, ...... 741 38 17 24.7 1,470 152 1,620 27.3 Water year 1943-44 . . 39,222 79S 17 107 77,810 3,360 81,670 112 » Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov. 27-30, Dec. 12 to Apr. 9. Time basis! Mountain war time. To convert war time to standard time, subtract 1 he TRIBUTARIES ABOVE OTHNISON RIVER 57

Keyser Creek near Leal, Colo.

Location.- Water-stage recorder, lat. 39°54'50", long. 106°01'00*, in SEi sec. ^3, T 1 s «» H- 77 W., 200 feet upstream from Slmpson Creek and 7 miles northeast of Leal. Drainage area.- 13.7 square miles. Records available.- August 1942 to September 1944 (no winter records 194,2-43). Extremes.- Maximum discharge during year, 129 second-feet June 9 (gage height, 2.83 feet), rrom rating curve extended above 90 second-feet; minimum not determined, occurred during period of no gage-height record. _ 1942-44: Maximum discharge, 139 second-feet June 26, 1943, from rating curve extended above 82 second-feet; maximum gage height, that of June 9, 1944; minimum dally discharge not determined, occurred during period of no gage-height record. Remarks.- Records poor. No diversion or regulation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. v Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 5. 2 3.7 69 66 17 6.0 2 5.2 3.7 6S 64 16 5.8 3 5.2 3.7 64 60 15 5.6 4 4.9 3.8 51 56 15 5.4 5 4.9 4.0 54 56 14 5.2 6 4.6 5.4 es 53 13 6.0 7 4.6 7.2 68- 49 13 4.8 8 4.2 6.S 77 46 13 4.6 9 3.8 6.6 90 43 12 4.6 10 3.5 8.4 103 43 12 4.4 11 4.6 7.3 101 40 12 4.2 12 *4.2 S. 8 96 36 11 4.2 13 5.6 12 94 33 11 4.2 14 5.2 16 94 30 10 4.2 15 4.9 22 97 29 9.8 4.0 > 4.0 > 3.5 3.2 > 3.0 > 3.5 > 3.6 16 A 5.6 30 97 27 9.2 3.S 17 5.6 (*) 25 93 , 25 9.0 3.S 18 4.9 SS 89 23 9.2 3.8 19 4;e 19 96 24 9.8 3.8 20 D4.6 18 99 23 9.2 3.8 21 D4.8 21 101 22 8.2 3.8 22 b4.6 25 99 20 7.6 3.S 23 b4.7 32 97 20 7.4 3.8 24 b4.6 39 97 21 7.4 3.8 25 D4.8 42 97 23 8.4 3.6 26 1)4.7 *37 SS 21 7.8 3.6 27 D4.6 36 78 19 7.0 3.6 28 b4.5 45 79 19 6.S 3.6 29 b4.5 53 77 18 6.4 3.6 30 b4.5 _ 60 71 IS 6.2 3.7 31 b4.5 ~ - - 66 - 17 6.2 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 146.9 5.6 3.5 4.74 291 November...... 120.0 4.0 23S December...... 106.5 - - 3.5 215 Calendar year January 99.2 _ 3.2 197 February...... 87.0 _ _ 3.0 173 March...... 108.5 _ _ 3.5 215 April...... 108.0 _ _ 3.6 214 ST...... 689.9 66 3.7 22.3 1,370 June...... 2,546 103 51 84.9 5,050. July...... 1,046 66 17 33.7 2,070 August. 319.6 17 6.2 10.3 634 September...... 128.1 6.0 3.6 4.27 284 later year 1943-44 ...... 5,507.7 103 - 15.0 10,920 » Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Sote.- No gage-height record Nov. 1 to May 25, July 24 to Sept. 30; discharge computed on basis of 3 discharge measurements at station, 3 measurements at mouth, weather records, and records for St. Louis Creek near Fraser. Tine basis; Mountain war time. To convert War time to standard time, subtract 1 hour. 670650 O - 45 - 5 58 TRIBUTARIES ABQVE GUWISON RIVER

Troublesome Creek near Troublesome, Colo.

Location.- Water-stage recorder, lat. 40°04', long. 106°19', In sac. 12, T. IN., R. 80 w., tnree-quarters of a mile upstream from mouth and 1 mile northwest of old Trouble­ some post office. Drainage area.- 178 square miles. Records available.- July 1904 to October 1905, April 1922 to September 1924, October 1941 to September 1944. Extremes.- Maximum discharge during year, 392 second-feet May 24 (gage height, 2.88 feet); minimum dally, 3.5 second-feet July 13, 14, Sept. 23. 1922-24, 1941-44: Maximum discharge observed, 672 second-feet May 27, 28, 1623 (gage height, 3.32 feet, datum then In use), from rating curve extended above 300 second-feet; minimum dally, 1.9 second-feet Sept. 23, 1942. Remarks.- Records excellent except those for Nov. 8-16, Nov. 27 to July 20, which are rair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Das Oct. Nov. Dec. Jan. Feb. Jlar. Apr. May June July Aug. Sept. 1 14 19 b28 19 19 19 25 40 165 7.8 10 6.0 2 12 20 b29 20 20 19 26. 42 159 7.1 13 5.4 3 12 27 29 20 19 19 27 36 159 6.0 13 5.4 4 11 27 29 20 19 19 29 30 153 V.3, 12 5.4 5 12 23 30 19 20 19 33 25 133 16 12 5.4 6 12 22 31 19 20 20 35 38 95 10 12 5.4 7 13 21 31 19 19 20 36 61 105 7.4 13 3.8 8 13 b25 29 20 18 20 3S 61 131 6.8 13 3.8 9 12 31 27 IS 18 20 39 61 114 7.1 .14 3.8 10 12 35 27 17 19 20 36 91 1S7 6.0 14 3.8 14- 11 12 39 26 17 19 20 40 95 268 8.5 4.1 12 12 43 24 17 #19 20 50 89 , 282 3.8 14 4.1 13 12 4642' 22 17 20 20 60 136 264 3.5 14 4.1 14 12 22 17 20 20 43 153 218 3.5 14 4.1 15 11 41 22 17 20 20 35 190 126 3.8 15 4.1 16 12 43 20 #17 20 20 30 229 91 5.C 15 4.1 17 11 #43 eo V 19 21 26 250 S7 3.8 14 4.4 18 11 35 *21 17 18 #21 32 162 64 5.0 14 4.4 19 12 35 21 17 IS 21 40 14O 54 6.4 15 4.4 20 13 36 23 IS IS 21 40 126 48 12 15 4.4 21 14 36 23 18 18 21 41 148 39 26 14 4.1 22 16 36 23 17 IS 22 34 156 33 30 11 3.8 23 18 36 23 17 19 22 #31 215 32 27 8.2 3.5 24 15 30 22 17 19 23 30 336 27 32 7.8 3.6 25 15 28 22 18 19 23 32 282 22 31 7.8 4.1 26 IS 26 22 18 19 22 33 222 22 23 7.1 4.1 27 19 b25 21 18 19 22 38 18O 2O 19 6.6 4.1 28 20 b27 21 17 19 22 45 16S 17 15 6.4 4.7 29 22 b28 21 17 18 23 43 177 19 14 6.4 5.0 30 24 b28 21 17 - 24 43 165 9.E 13 6.4 5.7 31 20 ~ 19 18 - 25 - 162 - 11 6.4

Seccnd- Runoff in Month fcct-days Maximum minimum Mean acre-feet

October...... 442 24 11 14.3 November...... 95'3 46 19 31 *S 1 89O December...... 749 31 19 24.2 1,*490 Calendar year 1943 ...... 20,363 420 11 55.8 4O,400 January...... 554 20 17 17.9 1,100 February...... 550 20 18 19.0 1,090 March...... 648 25 19 20.9 1,290 April...... 1,090 60 25 36.3 2,160 Hay...... 4,266 336 25 138 8,46O June ...... 3,143.8 282 9.8 105 6,240 July ...... 377.6 32 3.5 12.2 749 August ...... 358 * 3 15 6.4 11.6 711 September...... 133.3 6.0 3.5 4.44 264 Water year 1943-44 ...... 13,265.0 336 3.5 36.2 26,320 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Mote.- No gage-height record Nov. 9-16, Dec. 3 to Apr. 22 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 4 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 59

Blue River at Dlllon, Colo.

Location.- Water-stage recorder, lat. 39°36'50", long. 106°03'05", In sec. 18, T. 53., K. 77 W., at edge of Dlllon, a short distance upstream from Snake River and Tenmlle Creek. Datum of gage Is 8,821.42 feet above mean sea level, unadjusted. Drainage area.- 129 square miles. Records available.- October 1910 to September 1944. Average discharge.- 34 years, 118 second-feet. Extremes.- Maximum discharge during year, 642 second-feet June 19 (gage height, 3.15 feet;, from rating curve extended above 450 second-feet; minimum dally, 7.8 second- feet Feb. 13, 14. 1910-44: Maximum discharge observed, 1,180 second-feet June 2, 1914, June 14, 1924; maximum gage-height observed, 4.35 feet June 2, 1914; minimum discharge observed, 7.4 second-feet Mar. 22, 1933 (discharge measurement). Remarks.- Records excellent except those for period of Ice effect, which are fair. Practically all water diverted above station Is returned to river above.

Rating table, water year 1943-44, except periods of ice effect (gage height, in feet, and discharge, in second-feet) (Shifting-control method used Nov. 21-27) 0.9 18 1.4 60 2.5 320 1.0 24 1.7 103 2.6 455 1.1 31 1.9 137 3.1 615 1.2 39 2.2 218

Di96harge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. '96 1 44 33 24 12 9.6 11 20 27 440 320 52 2 44 3g 26 12 9.8 11 19 29 450 309 91 50 3 44 30 24 13 9.2 11 19 26 392 306 68 48 4 43 30 23 13 9.0 12 19 28 344 316 85 47 5 42 32 24 11 9.6 12 21 28 302 313 82 45 6 40 032 25 12 10 11 22 34 284 291 82 44 7 38 b25 35 12 10 11 021 41, 340 260 80 43 8 38 022 24 10 10 10 020 47 348 240 76 42 9 38 32 22 9.6 10 11 023 57 387 224 74 42 10 39 31 19 9.6 10 12 b23 61 582 215 73 41 11 39 32 IS 10 9.2 12 023 68 610 215 70 41 12 39 32 IS 10 8,4 12 024 76 549 206 68 40 13 39 31 18 10 7.8 13 25 9S 475 191 65 39 14 40 31 18 10 7.8 14 24 153 470 177 64 39 15 41 31 18 11 »7.9 14 25 206 450 16 S 63 38 16 41 31 18 11 8.0 14 23 253 470 188 63 38 17 41 30 18 11 8.2 15 23 267 445 194 61 37 18 40 29 18 11 8.2 16 24 212 400 166 59 37 19 39 29 18 *10 8.2 *17 .22 160 410 153 59 37 20 40 29 18 11 8.6 16 22 1 155 460 153 59 36 21 38 29 *19 11 9.2 16 22 174 465 168 60 35 22 *37 28 19 11 10 16 20 209 480 155 59 34 23 37 29 19 11 9.4 17 22 253 430 142 58 34 24 36 *28 19 11 10 17 *21 302 415 139 57 33 25 35 28 18 10 11 17 20 324 435 142 60 33 26 35 26 18 9.6 10 16 21 302 440 134 65 33 27 35 25 16 9.8 10 16 22 270 410 127 64 33 28 33 23 14 9.0 10 16 25 244 352 117 60 34 29 33 24 itf 9'.08.6 10 16 26 281 352 112 58 34 30 33 23 14 - 19 25 348 352 106 56 34 31 33 ~ 13 9.2 - 20 ~ 396 ~ 100 53 " Second- Runoff in Month - foot-days Maximum Minimum Mean acre- feet

October...... 1,194 44 33 38*5 2 370 November...... 867 33 ££ 1^720 December ...... 598 26 13 19!s 1,190 Calendar year 1943 ...... 38,772 551 12 106 V6 f 900 January...... 328.6 13 8.8 - 10.6 652 February...... '.. 269 . 1 11 7*8 9 .26 534 March...... 441 20 10 14.2 875 April ...... 666 26 19 22.2 1,320 Haway...... 5,131 396 27 166 10 , 180 June ...... 12,739 610 284 42a 25,270 Jnly...... 6,037 320 100 195 11,970 August...... 2,108 96 53 6S.O 4,180 September ...... 1,173 52 33 39.1 2,330 Water year 1943-44 ...... 31,551.7 610 7.8 86.2 62/590 60 TRIBUTARIES ABOVE OUNNISON RIVER Blue River above Green Mountain Reservoir, Colo s Location.- Water-stage recorder, lat. 39°49'55", long. 106 013'25", In sec. 34, T. 2 S., R. 79 W., just upstream from high-water line of Green Mountain Reservoir, 1 mile downstream from Brush Creek, and 18 miles southeast of Kremmllng. Datum of gage Is 7,946.56 feet above mean sea level, unadjusted. Drainage area.- 479 square miles. Recoras available.- May to September 1944. ISctremes.- Maximum discharge during period, 2,540 second-feet June 10 (gage height, 3.75 feet), minimum dally, 127 second-feet Sept. 23, 30. Remarks.- Records good. Many small diversions above station for Irrigation. cooperation.- Seven discharge measurements and gage-height record furnished by Bureau of Reclamation. Discharge, in second-feet, Bay to September 1944

Day May June July Aug. Sept. Day May June July Aug. Sept. 1 _ 1,800 1,330 394 212 16 - 1,890 704 281 151 2 - 1,600 1,270 3S4 205 17 - 1,750 664 273 144 3 _ 1,350 1,290 367 193 IS 859 1,600 608 269 141 4 - 1,170 1,290 362 136 19 736 1,720 586 285 138 5 _ 990 1,260 356 182 20 728 1,900 648 269 136 6 - 940 1,160 356 17S 21 787 1,930 640 248 130 7 - 1,300 1,060 340 175 22 950 1,920 600 236 .130 8 1,240 940 326 168 23 1,260 1,630 558 232 127 9 - 1,530 913 322 168 24 1,530 1,730, 579 236 130 10 _ 2,150 877 326 164 25 1,560 1,790 648 273 130 11 2,220 913 307 161 26 1,380 1,720 565 269 130 12 - 1,960 814 298 -168 27 1,130 1,590 509 252 130 13 _ 1,700 752 - 290 163 23 1,120 1,410 474 244 130 14 H 1,730 704 290 164 29 1,500 1,420 446 232 130 15 H 1,710 664 235 164 1,810 1,410 442 232 127 31 1,860 - 418 224 - Second- Rvmoff in Month foot-days Maximum Minimum Mean acre-feet

394 17*~97o September ...... 4,660 212 127 155 9,240 The period - - - - 206,500

Green Mountain Reservoir near Kremmllng, colo. Location.- Mercury gage, laU 39°52'45", long. 105019'15", in NEi sec. 15, T. 2 S., R. 80 w., at Green Mountain Damon Blue River, 0.6 mile upstream from Elllott Creek and 13 miles southeast of Kremmllng. Datum of gage Is 7,800 feet above mean sea level (Bureau of Reclamation bench mark). . Gage heights have been reduced to elevations above mean Sea level. Records available.- November 1942 to September 1944. Extremes.- i94

Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 61

Blue River below Green Mountain Regervoir, Colo.

Location.- Water-stage recorder, lat. 39°56', long. 106°21', In NEi eec. 33, T. 1 S., R. 80 w., Just downstream from Spring Creek, 4 miles downstream from Green Mountain Dam, and 10 miles southeast of Kremmling. Drainage area.- 623 square miles. Records available.- October 1937 to September 1944. Extremes.- Maximum discharge during year", 1,680 second-feet Oct. 29 ('gage height, 4.04 reet); minimum daily, 14 second-feet" Mar. 26. * 1937-44: Maximum discharge, 4,000 second-feet June 4. 1938 (gage height, 5.93 feet), ffom rating curve extended above 3,000 second-feet; minimum dally (prior to construction of Green Mountain Reservoir), 80 second-feet Feb. 18-24, 1938, Feb. 18, 19, 1940; no flow at times during 1943. Remarks.- Records excellent except those for period of no gage-height record, which are gooa. Flow regulated by Green Mountain Reservoir (capacity, 146,900 acre-feet) since Nov. 16, 1942 (see preceding page). Many small diversions above station for Irriga­ tion.

Rating table, water year 1943-44 (gage height, In feet, and discharge, In second-feet) 0.5 12 1.6 170 2.5 490 .6 19 1.7 190 3.0 785 .8 41 l.S E15 3.5 1,150 1.0 68 2.0 ESO 4.0 1,640 l.S 116 2,2 350 4.5 2,EEO

Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 E55 223 a580 184 ESO 144 236 146 1,250 1,260 598 ~ 446 2 E04 E67 a565 74 E53 148 91 152 1,250 1,070 559 234 3 136 US a065 6E EE4 138 226 143 488 955 590 176 4 343 600 a425 15 EE3 140 291 130 236 759 587 486 5 E15 319 a220 18 255 E6 29S 160 1,140 752 388 397 6 E36 E95 a5E5 140 91 116 316 27 1,020 811 376 432"432 7 352 118 a515 95 EOS 1E2 299 93 922 SIS 632 8 368 498 a52S 188 E44 132 2S3 202 922 746 571 507 9 E59 505 a530 113 E5E 118 34 236 97S 298 553 225 10 179 407 a475 156 E52 156 246 350 329 762 610 240 11 381 585 a255 55 244 114 300 327 167 65S 462 3S4 12 361 458 a!85 El E69 18 284 488 925 584 261 450 13 294 347 a490 193 70 124 361 578 1,050 532 146 414 14 EE8 156 a4SO 189 233 130 362 877 992 522 516 401 15 371 145 a490 152 ElO 115 227 1,200 9S3 578 449 460 16 SS1 E09 a475 147 218 111 112 1,640 955 537 522 232 17 E3 562 a510 157 2EO 149 S52 1,510 282 632 472 214 18 296 4E4 E70 135 E1E 1E4 233 1,470 86 682 511 368 19 B36 416 163 1E7 E35 15 207 1,540 861 722 296 - 366 20 3S6 308 326 1E4 19 163 203 906 976 596 200 351 21 397 163 479 142 179 167 19S 571 946 720 518 382 22 - 480 492 498 136 194 100 74 396 1,050 556 478 329 23 316 470 490 130 139 194 38 420 1,130 455 514 202 24 65 542 173 129 128 188 130 392 S72 664 453 66 25 304 534 6E 1E6 1EO 150 266 344 778 629 515 262 26 302 494 62 136 1E9 14 S6 306 974 654 524 505 27 E55 426 466 136 23 E62 156 378 1,200 635 306 414 28 E74 aEOO 378 164 107 E79 176 342 1,240 635 488 3.56 29 540 a575 a440 174 134 E7E 66 389 '1,240 642 484 444 30 EOS a560 a435 152 _ E45 73 ' 316 1,250 636 492 246 31 50 " 467 250 - 239 ~ 354 " 639 488 " Runoff in Month fol^Says "«*"»» Minimum Mean acre-feet October...... 8,994 540 23 290 17,840 November...... 11,358 600 US 379 22,530 December ...... 12,519 580 62 404 24,330 Calendar year 1943 ...... 171,134.2 " 2,870 0 469 339,400 January...... 4,OEO E50 15 130 7,970 February...... 5.359 ESO 19 185, 10,630 Maroh...... 4,413 E79 14 142 8,750 April...... 6,118 362 34 204 12,130 Bay...... 16,385 1,640 27 529 32,500 June ...... 26,494 1,250 86 863 58,550 July...... 21,139 1,260 29S 682 41,93O August ...... 14,559 632 146 470 28,880 September- ...... 10,421 507 66 347 20,670 Water year 1943-44 ...... 141,779 1,640 14 ' 387 281,200 a Ho gage-height record; discharge computed on basis of kilowatt hours generated by Green Mountain power plant. Tine basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 62 TRIBUTARIES ABOVE GUNNISON RIVER

Snake River near Montezuma, Colo.

Location.- Water-stage recorder, lat. 39°36'20n , long. 105°57'40", In NWi sec. 19, T. 5 S., R. 76 W., 200 feet downstream from North Fork, 500 feet upstream from power ditch, and 4t miles northwest of Montezuma. Prior to Oct. 13, 1943, staff gage at site 8 feet downstream at same datum. Drainage area.- 59 square miles. Records available.- July 1942 to September 1944. Extremes.- Maximum discharge during year, 479 second-feet June 9 (gage height, 2.66 feet): minimum daily, 9.2 second-feet Apr. 8. 1942-44: Maximum discharge observed, 495 second-feet June 9, 1943 (gage height, 2.69 feet, present site); minimum daily, 8.0 second-feet Apr. 2, 1943. Remarks.- Records good except those for periods of no gage-height record or ice effect, wnTcl are fair. Gage read $w!ce daily prior to Oct. 13. Small diversions above station for Irrigation and domestic use.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 34 13 15 10 11 10 10 10 253 253 71 33 2 30 11 15 11 11 10 10 10 218 246 69 31 3 29 13 14 11 11 10 10 10 190 253- 65 30 4 C7 14 14 11 11 11 10 12 157 235 63 30 5 25 15 14 10 11 10 11 136 235 55 29 6 25 11 14 11 11 10 10 . 15 163 218 49 28 7 24 11 14 11 11 10 9.S 17 197 190 45 28 8 22 12 13 11 11 10 9.2 17 204 178 42 27 9 22 13 13 11 11 10 9.5 21 311 169 42 27 10 22 15 12 11 11 10 9.5 22 355 166 42 28 11 22 18 11 11 11 10 9.5 21 319 160 39 28 12 21 19 11 11 11 10 9.8 33 267 148 36 28 13 21 19 11 11 11 10 9.5 57 253 136 35 28, 14 19 18 10 11 11 10 11 63 267 130 34 25 15 17 IS 10 11 *11 10 10 76 288 , 130 34 25 16 17 17 10 11 11 10 11 " 100 319 133 33 2S 17 a!7 17 10 11 11 10 86 323 120 30 S3 18 a!7 17 10 11 11 10 all 60 315 109 29 23 19 a!7 17 11 *11 11 10 all 47 359 117 35 21 20 a!7 16 11 11 10 *10 all 58 359 120 37 21 117* 21 a!5 16 11 11 10 10 alO 71 367 41 19 22 *21 16 *11 11 10 10 9.5 100 335 102 40 18 23 18 15 11 11 10 11 9.5 130 303 95 37 17 24 14 *15 11 11 10 11 9.5 136 347 104 42 17 25 18 15 10 11 10 11 *9.5 139 335 104 52 15 26 16 14 10 11 10 11 9.8 107 339 93 41 15 27 15 14 10 10 10 11 11 89 281 84 39 15 28 15 14 10 10 10 10 11 114 281 80 36 16 29 15 15 11 10 10 10 11 166 285 80 36 16 30 13 15 11 10 - 10 9.5 204 267 80 37 18 31 -13 - 10 10 - 10 - 232 ~ 74 35 - Second- Runoff in Mcnth foot-days Maximum Minimum Mean acre-feet October ...... 618 34 13 19.9 1.2SO November...... 453 19 11 15.1 899 December ...... 359 15 10 - 11.6 712 Calendar year 1943 ...... 25,452.2 435 8.C 69.7 50,500 January ...... 334 11 10 10.8 662 February- ...... 309 ll 10 10.7 613 March...... 317 11 10 10.2 629 April...... 303.1 11 9.S 10.1 601 May...... 2,234 232 10 72.1 4,430 June ...... 8,393 367 136 280 16,650 July...... 4,459 253 74 144 '8,840 August ...... 1,321 71 29 42.6 2,620 September ...... 702 33 15 23.4 1,390 Water year 1943-44 ...... 19,808.1 367 9.£ 54.1 39,280 * Winter discharge "measurement made on this day. a No gage-height record; discharge computed on basis of record for station at Dlllon. Note.- No gage-height record Nov. 7 to Apr. 6 (stage-discharge relation probably affected by ice uring entire period); discharge computed on basis of 5 discharge measurements and weather records. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE OTNNI SON RIVER 63

Snake River at Dlllon, Colo.

Location.- Water-stage recorder, lat. 39°36'50", long. 106 P03'04", In sec. 18, T. 5 S., R. '77 W., at private bridge at Dlllon, 100 yards upstream from mouth. Datum of gage Is 8,820.54 feet above mean sea level, unadjusted. Drainage area.- 92 square miles. Records available.- October 1910 to September 1919, December 1929 to September 1944. Average discharge.- 24 years, 66.8 second-feet. Extremes'.- Maximm discharge during year, 563 second-feet June 19 (gage height, 3.36 feet); minimum dally, 7.8 second-feet Sept. 22-25. 1910-19, 1929-44: Maximum discharge, 1,200 second-feet June 13, 1935 (gage height, 4.25 feet), from rating curve extended above 500 second-feet; minimum daily, 3 second- feet Nov. 9, 1912. Remarks.- Records excellent except those below 50 second-feet, which are good, and those ror periods of ice effect, which are fair. One diversion above station by a ditcti which diverts water for power. The diversion is in sec. 19, T. 5 S., R. 76 W., 6i miles above station; water Is returned to Blue River just above mouth of Straight Creek. Discharge measurements of power ditch are given in following table: Date Second-feet Date Second-feet Got 22 28.1 Apr. 25 9.2 Hov 24 15.9 May 29 37.0 Dec 22 13.4 June 26 .2 Jan 19 9.7 July 23 53.6 Fob 15 10.7 Aug. 27 33.8 Mar 19 7.8

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 10 S.4 10 9.2 9.6 13 12 12 256 240 24 12 11 e.rf 10 9.2 , 9.8 13 14 14 216 232 22 12 12 9.0 11 9.2 10 13 14 12 175 228 21 12 12 9.4 10 9.2 11 13 15 18 14g 228 20 12 5 11 9.6 10 9.2 11 13 15 14 118 205 20 12 15 22 124 175 19 11 6 12 S.4 10 9.0 12 13 15 167 "11 7 12 8.2 10 8.8 12 12 31 153 18 12 8.6 16 28 169 134 18 12 8 9.8 8.6 12 11 16 37 316 124 18 IS 9 11 9.4 9.6 8.4 12 11 17 34 10 10 11 9.4 8.2 12 11 445 116 18 12 11 11 12 9.2 8.4 12 11 15 35 430 114 17 15 12 13 13 9.2 8.6 12 11 15 46 380 94 16 18 13 11 13 9.2 8.S 12 11 16 74 352 86 16 20 14 11 13 9.4 8.8 12 11 15 es 362 76 16 20 15 11 13 9.4 8.S 12 11 14 98 380 76 16 15 16 11 12 9.4 8.8 12 11 14 116 405 86 16 9,3 17 ' 11 12 9,6 8.8 12 11 15 104 371 73 15 9.3 18 11 9.8 8.8 12 11 13 65 362 65 15 9.3 19 11 11 9.8 *8.8 12 11 13 51 420 62 15 8.4 20 11 11 9.8 8.8 12 11 12 50 450 70 15 8.4 ?1 *10 10 9.9 9.4 12 11 13 56 440 67 14 8.1 22 11 10 10 9.4 12 12 12 78 420 57 14 7.8 ?3 11 11 8.7 9.4 12 12 12 110 371 55 14 7.S 24 11 *10 10 9.2 12 11 12 114 380 61 13 7.8 25 11 10 9.8 9.0 12 12 *12 114 375 61 14 7.8 26 8.4 10 9.6 8.8 12 11 12 94 366 51 12 8.1 27 8.7 10 9.4 8.8 12 11 14 76 330 45 12 8.1 28 8.4 10 9.4 9.0 12 13 15 92 316 42 12 S.I Tffl 8.7 10 9.4 9 2 12 13 14 137 308 37 12 8.1 30 8.7 10 9.4 9.4 - 12 13 182 265 31 12 8.7 31 S.4 ~ 9.4 9.6 - 12 224 ~ 24 12 " Seoond- Runoff in Month f oot-days Maximum Minimum Mean aore-feet October...... 329.3 IS 8.4 10.6 653 November 312 13 8,0 10.4 619 December...... 299.6 11 9.2 9.66 594 Calendar year 1943 ...... 20,406.5 395 7.0 55.9 40,480 Jann ary 277,6 9.6 S.2 8.95 551 Febr 339.4 12 9.6 11.7 673 363 13 11 11.7 720 Apri 1...... 420 17 12 14.0 633 Mfy 2,226 224 12 71.8 4,420 9,611 450 US 320 19,060 July 3,168 240 24 102 6,280 Augu 496 24 12 16.0 984 September...... 331.1 20 7.8 11.0 657 Water year 1943-44 ...... 18,173.0 450 7.8 49.7 36,040 * Winter discharge measurement made on thla day. tTote.- Stage-discharge relation affected by Ice Hov, '2-4, 6-17, 19-21; Nov. 26 to Dec. 20, Dec. 25 to Mar. 20, Mar. 22, 25-29 (no gage-height record Dec. 2-20, Dec. 25 to Feb./L4, Feb. 16 to Mar. 18); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 64 TRIBUTARIES ABOVE GONNISOH RIVER

Tenmlle Creek at Frisco, Colo.

Location.- Water-stage recorder, lat. 39°34'30", long. 106°06'35", In sec. 34, T. 5 3., R. 78 w., 100 feet upstream from North Fork and half a mile west of Frisco. Datum of gage is 9,099,32 feet above mean eea level, unadjusted. Drainage area.- 79 square miles. Records available.- July 1942 to September 1944. Extremes.- Maximum discharge during year, 643 second-feet June 9 (gage height, 3.27 feet); minimum dally, 11 second-feet on many days in December, January, and February. 1942-44: Maximum discharge, that of June 9, 1944; minimum dally, 10 second-feet Jan. 4, 5, Mar. 3, 6-8, 10-22, 1943. , - Remarks.- Records good except those for period of ice effect or no gage-height record, wnicn are fair. Flow partly regulated by Robinson Reservoir (capacity, 2,520 acre- feet). A few small dlverslone above station for irrigation.

Discharge, in second-feet, water year. October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 30 18 13 11 11 12 18 17 466 214 50 22 29 18 13 12 11 12 17 19 416 211 50 22 17 13 12 11 12 17 18 359 204 47 20 25 IS 13 12 11 13 17 18 30S 208 44 20 23 18 13 11 11 13 17 20 268 192 46 20 6 22 18 13 12 11 13 17 30 321 171 44 20 21 14 13 12 11 - 13 17 50 376 152 42 IS 22 14 13 12 11 13 17 60 362 140 40 17 21 15 12 11 11 13 17 74 463 135 40 17 SS 16 11 11 11 13 17 67 495 135 41 17 11 22 16 11 11 11 13 17 69 459 140 39 17 24 17 11 11 11 14 16 96 402 117 36 17 16 11 11 11 14 16 147 391 10S 36 16 27 16 11 11 *11 14 16 204 397 104 35 16 26 16 11 11 11 14 15 252 398 104 36 16 16 25 16 11 11 11 14 15 297 3S7 124 36 17 25 15 11 11 11 14 14 259 348 102 34 16 24 15 IS *11 11 14 14 163 338 92 34 16 24 14 12 11 11 14 14 145 362 90 41 15 20 24 14 12 11 11 14 14 171 359 100 35 16 21 *23 14 12 12 11 15 14 204 352 93 33 15 22 14 13 12 12 15 13 272 325 87 30 14 22 13 13 12 12 15 13 362 297 79 I* 24 *13 13 12 12 15 13 402 294 83 29 14 20 13 12 12 12 15 *13 380 288 98 33 14 26 19 13 12 11 12 15 Xf 321 27S 72 31 15 19 13 11 11 12 15 Ik S75 246 64 2e 15 21 13 11 11- 12 15 15 335 233 58 26 15 21 13 12 11 12 16 16 441 233 57 24 15 13 12 11 _ 17 16 477 227 56 26 14 19 - 11 11 - 18 477 51 24 Second- Runoff in Month foe t-daya Maxima Minimum Mean ao re-feet

g« n

1 a December...... 372 13 11 12.0 738 Calendar year 1943 ...... 33,416 514 10 91.6 66,280 352

1 Q April...... am May......

July...... 214 o 220 September...... 499 22 14 16.6 990 Water year 1943-44 ...... 24,950 495 11 68.2 49,480 » Winter discharge measurement made on this day. Hate.- Stage-discharge relation affected by ice Nov. 2 to Dec. 3. Ho gage-height record Dec. 4 to May 8 (discharge probably affected by ice during most of period); discharge computed on basis of 5f discharge measurements and weather records. Time basiss Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE OUNNISON RIVER 65

Tenmlle Creek at Dlllon, Colo.

Location.- Water-stage recorder, lat. 39°36'45", long. 106°03«15", In sec. 18, T. 55., K. 77 W., at Dlllon, 250 feet dovmstream frcan highway bridge and 200 yards upstream from mouth. Datum of %age Is 8,817.97 feet above mean sea level, unadjusted. Drainage area.? 113 square miles. Records av&llable.- October 1910 to September 1919, April 1930 to September 1944. Average discharge.- 24 years (1910-19, 1929-44), 12£ second-feet. Extremes.- Haxlmum discharge during year, 810 second-feet June 9 (gage height, 4.15 feet): minimum daily, 11 second-feet Feb. 12, 17-20. 1910-19, 1930-44: Haxlmum discharge, 2,010 second-feet June 1, 1933 (gage height, 5.82 feet, site and datum then In use), from rating curve extended above 1,000 second- feet; minimum, 2 second-feet Feb. 15-17, 20, 1918. Remarks.- Records good except those for period of Ice effect or no gage-height record, whTcH are fair, /low partly regulated by Robinson Reservoir (capacity, 2,530 acre- feet). Diversions above station for Irrigation and mining.

Discharge, in second-feet, water year October 1943 to Septeaber 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 48 35 21 14 13 14 23 38 590 "312348 71 36 2 47 30 21 14 13 14 23 39 542 69 35 3 47 36 21 14 13 15 24 33 476 296 64 34 4 41 38 SO 14 13 16 25 31 413' 298 60 33 5 38 35 SO 13 13 16 26 38 360 27S 60 33 6 37 36 20 14 13 15 28 48 409 249 62 33 7 36 2S 21 14 13 17 29 88 506 220 5S 32 a 35 SO 21 14 12 17 30 96 472 194 67 31 9 35 21 21 12 12 17 29 117 599 188 ' 57 31 10 36 22 21 12 12 16 3J 126 682 185 $8 31 11 37 24 20 12 12 16 33 119 643 191 53 31 12 39 24 19 12 11 16 29 158 568 167 50 31 13 42 84 19 12 12 15 30 216 537 152 49 30 14 44 23 20 12 *12 17 28 280 537 141 46 30 15 41 25 21 12 12 17 27 348 555 137 49 31 16 42 23 20 12 12 16 24 409 550 150 50 31 IT 41 22 19 12 11 16 28 388 493 12 S 48 31 18 40 22 19 12 11 16 28 253 480 117 48 30 19 40 22 19 12 11 14 28 209 489- 113 56 30 20 37 22 20 12 11 16 88 231 a520 126 50 30 21 35 21 20 12 12 18 28 272 a515 124 46 30 22 37 21 21 18 , 12 18 26 356 a490 108 42 30 23 38 21 19 12 12 19 25 459 a460 98 39 30 24 34 *20 20 12 12 19 26 489 a440 104 39 30 25 1 34 20 19 12 12 18 *27 496 a440 124 47 30 26 34 20 18 IS 12 18 28 430 434 98 43 31 27 34 SO 17 12 13 17 34 372 376 90 41 31 28 36 21 16 12 13 18 40 430 358352' 83 38 31 29 35 21 14 12 13 21 38 550 81 38 31 30 35 21 15 12 - 24 35 603 348 78 39 30 31 35 - 15 12 - 24 - 608 72 37 Seoond- Runoff in Month f oot-clays Maximum Minimum Mean acre- feet October...... 1,190 4B 34 38.4 2,360 November...... 736 38 8C 84.5 1,460 Deoeaber...... 597 21 14 19.3 1,180 Calendar year 1943 44,554 647 14 122 88,350 January...... 387 14 IE 12.5 768 February. :...... 353 13 11 12.2 700 March...... 530 24 14 17.1 1,050 April...... 856 40 23 88.6 1,700 Bay...... 8,326 60S 31 269 16,510 June ...... 14,628 632 346 488 S9,010 July...... 5,036 348 72 163 ' 9,990 August...... 1,56* 71 37 50.5 3,110 Septeaber...... 938 36 30 31.3 1,860 Water year 1943-44 ...... 35,147 682 11 96.0 69,700 * Winter discharge measurement made on this day. a So gage-height record; discharge computed on basis of record for station at Frisco. Hote.- Stage-discharge relation affected by ice Nov. 7 to Mar. 3, Mar. 20 to Apr. 10. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER

Straight Creek near Dillon, Colo.

Location.- Water-stage recorder, lat. 39°39'05", long. 106°00'55n , in NWi sec. 4, T. S 8., R. 77 W., 400 feet upstream from Laskey Creek and 34 milqp northeast of Dillon. Drainage area.- 12.8 square miles. Records available.- September 1943 to September 1944 (no winter records). Extremes.- Maximum discharge during period September 1943 to September 1944, 136 second- feet June 19 (gage height, 2.23 feet), from rating curve extended above 70 second-feet; minimum daily determined, 2.6 second-feet Nov. 28, but probably less during period of no record. Remarks.- Records good except those for period of ice effect or no gage-height record, wmcn are fair. No diversion above station. Discharge second-feet, 1943-44 1943 Day Aug. Sept. Day Aug.' Sept. Day Aug. sept. 1 _ 14 11 _ 8.8 21 _ 7.5 2 - 14 12 r. S.S 22 _ 6.S 3 - 12 13 - S.O 23 _ 6.8 4 - 12 14 - S.O 24 - 6.8 5 - 12 15 - 8.0 25 - 6.8 6 - 11 16 - 7.5 26 _ 6.8 7 - 10 17 - 7.2 27 - 8.0 8 - 10 18 - 7.2 28 _ 6.8 9 - 10 19 - S.4 29 _ 6.S 10 - 9.3 20 - 8.4 30 _ 6.8 31 tl4 - t Result_ of discharge measurement. 1943-44 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6.8 4.6 38 58 11 4.7 2 6.4 4.4 31 53 10 4.4 3 6.4 4.6 25 51 9.8 4.4 4 6.4 5.0 22 46 9.3 4.0 5 6.1 5.2 19 46 9.3 4.O 6 6.1 4.2 25 42 8.4 4.0 7 6.1 3.6 29 39 7.5 4.0 8 5.8 3.0- 30 37 7.2 3.8 9 5.8 3.2 58 34 7.2 3.8 10 5.8 3.6 72 33 6.8 3.8 11 5.8 4.0 68 31 6.8 3.8 12 5.4 3.8 61 29 6.S 3.8 13 a6.2 3.5 60 26 6.4 3.8 14 a7.2 3.2 61 24 6.4 3.6 15 a7.2 3.2 17 80 24 6.4 3.8 16 »6.8 3.2 85 23 6.4 3.8 17 6.4 3.2 79 22 6.1 3.8 18 6.1 »3.4 80 21 6.8 3.8 19 5.3 4.0 94 22 8.0 3.6 20 5.6 3.8 101 22 6.8 3.6 21 6.0 3.8 1OO 21 6.4 3.6 22 5.4 3.6 86 19 6.1 3.6 23 5.3 3.8 80 19 5.8 3.6 24 6.6 3.8 78 20 6.4 3.6 25 6.0 3.6 73 18 6.8 3.6 28 5.6 3.2 71 16 5.S 3.6 27 5.2 2.8 63 14 5.4 3.6 28 4.7 2.6 32 63 14 5.0 3.6 29 4.4 3.0 29 60 14 5.4 3.6 30 4,, 2 3.2 35 59 13 5.4 3.6 31 4.8 ~ 38 ~ 12 5.0 - * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of weather records and records for nearby stations. Note.- Stage-disc-harge relation affected by ice Oct. 20-27, 30, 31, Nov. 1-12, 26, 27. Ko gage- he IgBTTrecord Nov. 28-30, May 1-27 (stage-discharge relation probably affected by ioe during most of period); discharge computed on basis of weather records and records for stations on nearby streams.

Monthly dischargl, in second-feet, 1943-44 Seoond- Mean Runoff in Month foot-days Maximum Minimum acre-feet 525" 264.5 14 , 6.8 8.82 182.9 7.2 - 4.2 5.90 363 110.3 S.2 2.6 3.68 219 593 33 19.1 1,180 1,851 101 19 61.7 3,670 865 58 12 27.9 1.720 216.9 11 5.0 7.OO 1 430 114.5 4.7 3.6 3.82 227 Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 67

Willow Creek near Dillon, colo.

Location.- Water-stage recorder, lat. 39°39'00", long. 106°04'45n , in NWj sec. 1, T. 5 S., R. 7S W., at bridge on State Highway 9, 700 feet upstream from mouth and 3 miles northwest of Dillon. Prior to Apr. 24, 1944, staff gage at same site and datum. Datum of gage is 8,691.59 feet above mean sea level, unadjusted. Drainage area.- 13.5 square miles. Records available.- July 1942 to September 1944. - i Extremes.- Maximum discharge during year, 116 second-feet May 30 (gage height, 2.10 feet); minimum dally, 1.0 second-foot Aug. 7. 1942-44: Maximum discharge observed, 150 second-feet (corrected) June 2, 1943 (gage height, 2.30 feet); minimum daily, 0.4 second-foot July 29-31, Aug. 1, 6, 1942. Remarks.- Records excellent, above 10 second-feet and fair below. Gage read twice daily oct. 1 to Nov. 6. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 6.5 b4.9 4.3 3.5 3.S 3.6 3.5 4.9 65 61 1.5 7.0 2 6.5 M.4 4.6 3.6 3.9 3.6 . 3.2 6.1 46 55 1.4 7.4 3 6.5 M.3 4.3 3.6 4.0 3.5'3.6 3.2 5.2 33 52 1.3 7.4 4 6.0 b4.5 4.7 3.2 4.1 3.5 4.3 29 52 1.2 7.0 5 6.0 4.7 5.1 3.0 4.1 3.5 3.8 6.4 23 51 1.2 6.4 6 5.S b4.6 5.4 3.2 4.2 3.4 3.6 9.4 23 44 1.3 6.4 7 6.0 4.2 5.4 3.3 4.2 3.1 3.6 12 36 35 1.0 6.1 8 5.5 3.S 5.2 3.3 4.1 3.0 3.8 14 34 32 1.1 5.8 9 5.5 .0 4.S 3.0 4.0 3.0 3.4 18 46 30 1.3 5. 5 10 5.5 .3 4.8 2.7 3.9 3.1 3.9 20 59 30 1.5 5.2 11 5.3 .5 4.4 2.9 3.7 3.0 3.7 20 57 29 1.6 5.2 12 5.5 .6 3.7 3.1 3.4 2.9 3.5 26 50 24 1.4 5.2 13 5.5 .7 3.7 3.1 3.4 2.8 3.4 23 46 21 3.4 4.9 14 5.3 .7 5.4 3.0 *3.5 3.1 4.0 34 53 17 9.0 4.0 15 5.1 .5 4.9 2.9 3.4 3.0 3.7 45 55 13 9.4 3.8 16 5.1 .4 5.0 3.1 3.2 S.9 4.1 48 62 11 8.6 3.6 17 5.1 .2 5.2 3.1 3..0 3.1 5.0 46 53 7.8 8.2 4.5 18 5.1 * .0 5.4 »3.0 3.0 3.1 4.4 30 50 3.0 9.0 3.6 19 5.1 .8 5.4 3.3 3.0 Z.O 3.9 23 61 2.4 12 2.2 20 4.7 .9 *5.4 3.3 3.1 *2.9 3.9 24 75 2.4 11 2.4 21 5.1 .1 5.4 3.3 3.2 2.8 4.7 27 81 B.2 6.7 2.2 22 5.1 .1 4.9 3.3 3.3 3.0 4.7 34 1.9 6.1 2.2 23 5.1 .2 4.7 3.4 3.2 2.9 4.7 46 3? 1.8 5.5 2.E ' 2624 5.1 .3 5.0 3.5 3.3 3.2 . *4.6 60 77 1.8 5.8 2.2 5.1 .3 4.5 3.6 3.4 3.0 4.6 62 7S 1.9 9.8 2.4 26 5.3 .0 4.1 3.5 3.3 £.9 4.6 50 7S 1.6 8.2 2.4 27 5.1 .7 3.8 3.3 3.3 3.1 5.E 38 66 1.8 7.8 2.6 28 5.3 .6 3.6 3.5 3.4 3.0 5.5 41 62 1.7 7.4 2.6 29 5.3 .9 3.7 3.4 3.5 2.8 6.1 66 62 Iv7 7.4 a. 6 30 5.3 .0 3.8 3.6 _ 3.3 4.6 67 67 1.7 7.4 8.4 31 5.3 - 3.6 3.8 - 3.4 70 - 1.6 7.0 - Seocnd- Runoff in Month fodt-days Maximum Minimum Mean acre-feet s'.e 5.44 127. E 4.9 4.24 252 December...... 144.2 5.4 3.6 4.65 286 Calendar year 1943 ...... 6,138.8 143 2.3 16.8 12,180 101.4 3.8 2.V 3.27 201 96.6 3.6 2.S 3.12 192 124.4 6.1 3.E 4.15 May ...... 985.3 70 4.3 31.8 1,950 1,669 81 23 55.6 July ...... 592.3 61 1.6 19.1 September...... 127.2 7.4 2.2 4.24 252 ffster year 1943-44 ...... 4,404.7 81 1.0 12.0 8,730 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Hote.- Ho gage-heieht record Nov. 7 to Apr. 23 (stage-discharge relation probably affected by ice during entire period!; discharge computed on basis of.5 discharge measurements and weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 68 TRIBUTARIES ABOVE OUNNISON RIVER

Rock Creek near Dlllon, Colo.

Location.- Water-stage recorder, lat. 39°43'25", long. 106°07'40", In NEi sec. 9, T. 4 B., K. 78 W., at bridge on State Highway 9, a quarter or a mile upstream from mouth and 9 miles northwest of Dlllon. Datum of gage Is 8,473.76 feet above mean sea level, unadjusted. Drainage area.- 15.8 square miles-. Records available.- July 1942 to September 1944. Extremes.- Maximum discharge during year, 157 second-feet Itey 30 (gage height, 2.19 reet;; minimum dally, 2.5 second-feet Jan. 9, 10. 1942-44: Maximum discharge, 199 second- feet June 30, 1943 {gage height, 2.34 feet), from rating curve extended above 140 second-feet; minimum dally, that of Jan. 9, 10, 1944. Remarks.- Records good except those for periods of no gage-height record or Ice effect, wnicn are fair. A few small diversions above station.

Discharge, in second-feat, water year October 1943 to September 1944 Day Oct. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 11 6.5 5.4 3.7 3.7 5.2 6.2 5.4 120 94 23 7.8 2 11 6.2 5.6 3.9 3.9 . 5.4 5.8 5.8 90 92 23 7.4 S 11 5.8 5. ~4 4.0 4.1 5.4 5.8 6.6, , 70 102 23 7.4 4 10 6,2 5.4 3.8 4.4 5.2 6.0 7.4 59 100 22 7.4 5 9.6 6.4 5.6 3.0 4.6 5.0 6.0 9.0 48 96 19 7.4 6 9.0 6.0 6.4 3.5 4.8 4.8 6.0 11 60 85 16 7.4 7 S.2 5.2 6.4 S.S 5.0 4.6 6.0 14 90 71 16 7.0 f» 7.6 5.0 6.4 3,0 5,0 4.2 6.2 17 80 64 15 7.0 9 7.4 5.4 6.4 2.5 4.8 4.5 6.4 20 94 68 16 7.0 10 7.4 6.0 6.0 2.5 4.6 4.7 6.6 19 115 66 16 6.8 n 7.4 6.4 5.6 2.8 4.3 4.5 6.2 25 110 70 15 6.8 12 7.5 6.8 5.2 2.7 4.1 4.4 5.6 32 102 56 15 6.3 13 »7.S 6.S 5.2 2.6 4.0 5.0 5.4 44 96 48 13 6.3 14 S.O 6.8 6.0 2.6 »4.^ 5.4 5.0 49 94 46 13 5.8 15 B.O 6.4 5.6 2.7 4.0 5.0 5.0 66 96 44 13 5.8 16 7.S 6.2 S.S 2.8 3.9 5.2 5.0 84 104 41 13 5.8 X7 e.o 6.0 6.0 2.7 3.6 5.8 5.0 44 94 SB 12 5.6 IB S.O *5.4 6.2 *2.8 - 3.8 6.0 4.6 49 87 35 13 5.3 19 7.8 5.4 6.6 3.0 3.8 s. a 4.2 38 .104 42 IS 5.1 20 7.6 5.S 6.8 2.9 3.9 *5.5 4.0 33 115 50 IS 5.1 21 7.9 5.8 6.S 2.9 4.0 5.7 4.5 40 117 42 14 5.1 2? 6.8 5.6 6.4 3.0 4.5 5.7 4.2 58 112 - 40 13 5.3 tSI 7.1 5.8 6.4 3.2 4.3 5.9 4.0 84 loo 38 12 5.1 84 10 6.0 6.0 3.4 4.3 6.2 *3.7 106 117 42 13 5.1 85 8.5 6.0 5.0 3.4 4.8 5.7 4.0 98 124 46 IS 4.8 26 8.2 5.0 4.5 3.1 5.0 5.4 4.5 77 115 40 15 4.8 27 7.9 4.4 4.2 3.0 4.5 5.7 S.S 63 100 34 12 4.6 JJB 6.5 4.3 4.0 3.2 4.5 5.6 6.0 66 90 26 11 4.6 89 6.4 4.6 4.2 3.1 5.0 5.6 5.4 94 102 26 9.£ 4.6 30 6.4 4.8 4.4 3.5 5.8 5.0 124 106 26 9.4 4.4 31 6.4 - 4.0 3.8 - 6.0 - 134 - 24 02 ~ Second- Runoff in Month foot-clays Maximum Minimum Mean ao re-feet

December ...... 173.9 6.S 4.0 5.61 345 Calendar year 1943 ...... '...... 10,694.4 174 3.1 £9.3 21,280 January. . February 3 7 * 249 March...... 157 5 5 25 ay...... 2 Q-| » 48 15 0 September...... 178.9 7.8 4.4 5.96 355 Water year 1943-44 ...... 7,917.2 134 2.5 21.6 15,700 * Winter discharge measurement made on this day. Ho te. - Ho gage-height record Oct. 1-20; discharge computed on basis of 1 discharge measurement, weather records, and records for nearby stations. Stage-discharge relation affected by ioe Hov. 2 to Hay 12 (no gage-height record Nov. 4 to Apr. 7, Apr. 21-23; discharge computed on basis of 5 dis­ charge measurements, weather records, and records for stations on nearby streams. Time baaist Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 69

Boulder Creek near Dillon, Colo.

Location.- Water-stage recorder, lat. 39°44 t 15", long. 106°08'05", In NWi sec. 4, T. 4 s., R. 78 W., at bridge on State Highway 9, 500 feet upstream from mouth and 10 miles northwest of Dillon. Datum of gage Is 8,456.79 feet above mean sea level, unadjusted. Drainage area.- 9.7 square miles. Records available.- July 1942 to September 1944. Extremes.- Maximum discharge during year, 154 second-feet June 24 (gage height, 2.61 reet;; no flow( oct. 19 to Nov. 1, Sept. 3-30. 1942-44: Maximum discharge, 255 second-feet June 21, 1943 (gage height, 2.97 feet), from rating curve extended above 130 second-feet; no flow at times. Remarks.- Records good except those for periods of no gage-height record or Ice effect, ana tnose for Aug. 1 to Sept. 2, which are fair, ffliall diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 9 2 1.4 .4 .6 .7 1.1 1.2 .9 .9 53 70 3.3 .1 3 1.1 b.4 .5 .S 1.3 1.2 1.0 1.7 39 61 1.9 0 4 .9 b.4 .7 .T 1.3 1.1 1.0 2.0 31 5S. 1.3 0 5 .8 .5 .9 .5 1.5 1.0 1.1 1.7 24 57 .7 0 6 .6 .5 .9 .7 1.7 .9 1.0 2.5 24 53 .6 0 7 .5 .4 .9 ,8 1.8 .s 1.0 2,9 43 47 .7 0 R .5 .3 .8 .6 1.6 .s 1.1 3.1 46 42 .6 0 9 .4 .4 .8 .6 1.5 .9 .9 5.0 53 46 .8 0 10 .4 .5 .8 .5 1.4 1.0 1.2 7.0 67 40 .S 0 11 .4 .6 .7 .6 1.3 1.0 1.0 7.0 60 33 .6 0 I? .4 .7 .6 .6 1.2 1.1 .9 9.1 57- 30 .6 0 13 .4 .7 .6 .7 1.3 1.1 .9 13 55 26 .3 0 14 .4 .6 .9 .8 l.S 1.2 1.2 20 5S 24 .3 0 15 .3 .5 .8 .7 1.2 1.0 .8 30 68 23 .2 0 16 .2 .6 .8 1.0 1.1 1.0 1.1 37 62 20 .2 0 17 .1 .6 .9 .9 1.0 1.2 1.7 30 60 20 .2 0 18 .1 *.6 .9 1.8 1.0 1.0 1.2 2T 62 16 .2 0 Ifl 0 .5 .9 1.3 .9 .9 .8 IS 78 17 .6 0 20 0 .4 *.9 1.1 1.0 *.9 .8 16 64 20. .6 0 21 0 .7 .9 1.1 1.0 1.0 .9 18 57 16 .6 0 22 0 .4 .S 1.2 1.1 .9 .9 24 54 14 .6 0 ?3 0 .6 .8 1.2 1.0 1.0 .8 31 57 12 .5 0 24 0 .6 .9 1.0 1.0 1.2 *.8 SB 84 19 .5 0 25 0 .5 .6 .9 1.1 1.0 .8 40 80 23 .5 0 26 0 .4 .6 .9 1.0 .9 .8 36 70 14 .4 0 27 0 .3 .5 1.1 .9 1.0 .9 32 70 11 .3 0 28 0 .3 .5 .9 1.0 .8 1.0 36 63 8.3 .3 0 29 0 .4 .6 1.0 1.1 .9 .9 64 67 5.2 .8 0 30 0 .4 .7. 1.0 _ 1.0 .9 61 67 4.9 .1 0 31 0 ~ .6 1.0 - 1.1 " 63 ~ 5.0 .1 " Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

November...... December...... 22.9 .9 1 .74 46 Calendar year 1943 ...... 6,439.6 178 0 17.6 12,780 c

29 4 .£ 4.C September...... 2 .1 0 .01 .4 Water year 1943-44 ...... 3,483.2 84 0 9.S2 6,900

-.scharge measurement, __0_ record Nov. 5-17, MOV. 23 to Apr. 7 (stage-discharge relation probably affected by ice during entire period); discharge computed on baa Is of 4 discharge measurements and weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 0 70 TRIBUTARIES ABOVE GUNNISCN RIVER

Slate Creek near Dillon, Colo.'

Location.- water-stage recorder, lat. 39006'55tl , long. 106009'45n , in NEi sec. 19, T. 3 S., R. 78 W., 2,000 feet upstream from mouth and 13 miles northwest of Dillon. Datum of gage is 8,227.70 feet above mean sea level, unadjusted. Drainage area.- 16.8 square miles. Records avallabls.- July 1942 to September 1944. Extremes.- Maximum discharge during year, 120 second-feet June 25 (gage height, 1.81 feet); minimum daily, 1.0 second-foot Oct. 19, 20, Nov. 2, 3, 8, 9. 1942-44: Maximum discharge, 203 second-feet June 30, 1943 (gage height, 2.25 feet), from rating curve extended above 110 second-feet; minimum dally, 0.4 second-foot Oct. 22, 1942. Remarks.- Records excellent except those for periods of ice effect or no gage-height record, which are fair. Small diversions above station for irrigation.

Rating table, water year 1943-44, except periods of Ice effect (gage height. In feet, and discharge, In second-feet) 0.4 1.0 0.8 8 1.2 34 .5 1.5 .9 13 1.3 44 .6 2.5 1.0 19 1.5 6S .7 5.0 1.1 26 1.6 118 Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. v 1 al.6 1.2 3.6 3.2 3.2 3.0 3.5 3.0 S8 62 3.0 2.S 2 al.5 1.0 3.6 3.2 3.2 3.0 3.5 3.0 72 61 3.5 2.3 3 al.4 1.0 3.6 3,2 3.2 3.1 3.5 2.5 57 61 7.1 2.2 4 al.S 1.6 3.6 3.2 3.2 3.1 3.6 3.2 44 63 6.0 2.1 5 al.S 1.5 3.6 3.2 3.2 3.1 3.6 4.2 34 64 12 2.2

' 76 al.S 1.1 3.6 3.2 3.2 3.1 3.6 9.0 33 57 16 2.0 al.5 1.1 3.5 3.1 3.1 3.1 3.6 12 50 48 14 2.3- 8 al.S 1.0 3.5 3.0 3.1 3.1 3.7 14 44 33 14 2.2 9 al.S 1.0 3.5 2.9 3.0 3.2 3.7 15 45 38 13 2.3 10 al.6 1.2 3.5 2.9 3.0 3.2 3.7 18 5S 36 14 2.3 11 al.7 3.0 3.5 2.9 2.9 3.3 3.7 20 56 36 12 2.4 12 al.7 4.8 3.5 2.9 2.9 3.3 3.7 25 52 29 10 2.4 13 al.S 5.0 3.5 2.9 2.S 3.3 3.7 34 3S 22 7.7 2.4 14 al.7 5.0 3.5 2.9 *2.8 3.4 3.6 45 42 19 8.0 2.4 15 al.S 5.0 3.6 2.9 2.8 3.4 3.6 56 40 18 8.0 2.4 16 ' 1.4 4.5 3.6 2.9 2.7 3.4 3.6 71 54 15 7.7 2.3 17 1.3 4.5 3.6 2.9 2.7 3.4 3.5. 67 49 0.4 7.4 2.3 18 1.2 *3.2 3.6 *2.9 2.7 *3.4 3.5, 44 48 10 7.1 2.2 19 1.0 3.2 3.7 2.9 2.7 3.5 3.5 29 61 13 S.5 2.1 20 1.0 3.2 *3.7 3.0 2.8 3.5 3.5 28 77 21 10 2.1 *21 1.1 3.5 3.7 3.0 2.8 3.6 3.5 30 SO 22 9.0 1.8 22 1.2 3.2 3.7 3.0 2.9 3.7 3.4 35 82 16 7.1 1.8 23 1.3 3.2 3.7 3.0 2.9 3.7 3.4 50 64 12 6.5 1.6 24 1.4 3.0 3.6 3.0 2.9 3.6 *3.3 64 74 21 6.5 1.8 25 1.4 3.0 3.5 3.0 2.9 3.8 3.2 67 8S 32 11 1.7 26 1.4 3.1 3.3 3.1 2.9 3.7 3.1 51 SO 17 13 1.5 27 1.3 3.2 3.2 3.1 3.0 3.7 3.0 43 57 11 9.5 1.5 28 1.2 3.3 3.1 3.2 3.0 3.6 2.8 50 48 7.7 7.4 1.5 29 1.2 3.4 3.1 3.2 3.0 3.6 3.2 67 58 7.4 6.2 1.4 30 1.2 3.4 3.1 3.2 _ 3.6 2.8 93 67 6,8 4.Q 1.4 31 1.2 - 3.2 3.2 - 3.6 - 102 - 5.9 3.8 - _.. Runoff in Month ££& *utiB- Miai- Mean acre-feet

October ...... 43.3 1.6 1.0 1.40 86 November ...... 85.4 5.0 1.0 2.85 169 December ...... 108.6 3.7 3.1 3.50 215 Calendar year 1943 ...... 6,406.2 157 1.0 17.6 12,700 January...... 94 2 3.2 2.9 3.04 187 February...... Ssls 3.2 2.7 2.95 170 March...... 105.3 3.S 3.0 3.40 209 . April ...... 103.8 3.7 2.8 3 . 46 206 May...... 1,154.9 - 102 2.5 37.3 2,290 June ...... 1,740 SS 33 58.0 3,460 July...... 878.8 64 5.9 28.3 1,740 August ...... 275.6 16 3.0 8.90 547 September ...... 61.7 2.6 1.4 2.06 122 Watv year 1943-44 ...... 4,737.3 102 * 1.0 12.9 9,390 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basts of 1 discharge measurement and records for stations on nearby streams. Note.- Stage-discharge relation affected by ice Nov. 2, 3, 6-13, 26-29. Ho gage-height record Nov. 30 to Apr. 26 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 4 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE SUNNISON RIVER 71

Black Creek-below Black Lake, near Dillon, Colo.

Location.- Water-stage recorder, lat. 39°48', long. 106°16', in sec. 8, T. 3 S., R. 79 w., tfiree-quarters of a mile downstream from Black Lake and 17 miles northwest of Dillon. Drainage area.- 15.2 square miles (revised). Records available.- July 1942 to September 1944. Extremes.- Maximum discharge during year, 207 second-feet June 25 (gage height, 3.58 reex)J minimum dally, 2.4 second-feet Feb. 15-17. 1942-44: Maximum discharge, 384 second-feet July 1, 1943 (gage height, 4.72 feet)., from rating curve extended above 170 second-feet; minimum observed, 2.0 second-feet. Oct. 13, 14, 1942 (gage height, 1.53 feet). Remarks.- Records excellent except those for period of Ice effeet or no gage-height record, which are fair. No diversion above station.

Dischargs, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb, Mar. Apr. May June July Aug. Sept. 1 7.6 7.2 3.2 2.8 2.9 2.6 3.2 3.1 149 154 42 12 2 7.2 6.1 3.2 2.8 2.9 2.7 3,3 3.2 109 156 42 10 3 7.2 5.7 3.1 2.7 2.9 2.7 3.3 3.3 82 146 42 9.4 4' 6.S 8.1 3.0 2.7 2.S 2.7 3.3 3.3 61 162 37 S.7 5 6.4 6.S 3.0 E.7 2.8 2»7 3.3 3.3 47 167 36 8.4 6 6.1 5.0 3.0 2.7 2.8 2.7 3.3 3,6 49 149 32 8.4 7 5.7 5.4 3.0 2.7 2.7 2.7 3.3 6.0 77 130 31 S.I 8 S.O 5.0 2.9 2.7 2.6 2.8 3.3 8,0 83 112 32 7.2 9 4.3 5.0 2 9 2.7 2.6 2.8 3.3 10 106 US 32 6.9 - 10 3.9 S.O Z.<3 2.7 2.6 2.9 3*3 9.5 . 149 124 31 8.6 11 3.9 4.6 2*3 2.7 2.5 2«9z'.9 3*2 13 152 118 30 6.3 12 3.6 4.6 2.8 2.7 2.5 3.2 20 120 100 27 6.0 13 4.6 4.6 2.6 2.7 2.5 2.9 3.2 27 92 84 24 5.8 14 5.0 3.9 2.8 2.7 2.5 z'.Q2 o 3.2 37 109 79 £2 5.4 15 5.0 3.9 2.8 2.7 2.4 3.1 50 112 78 22 5.2 16 5.0 3.6 2.8 2.7 2.4 2.9 3.0 58 149 79 23 4.8 17 5.0 3.6 2.8 2.7 2.4 2.9 3.0 56 130 74 21 4.4 18 5.0 *3.6 2.9 2.7 2.S 2.9 3.0 45 97 61 20 4.0 19 5.7 3.2 2.9 2.7 2.S 3.0 2.9 *35 143 68 22 3.8 20 5.7 3.2 2.9 2.7 2.5 3.0 2.9 33 170 79 23 3.6 21 5.4 3.2 2.9 2.7 2.6 3.1 2.9 33 175 74 21 3.4 22 4.6 3.0 2.9 2.7 2.6 3.1 2.8 42 172 63 18 3.4 23 5.4 2.S 2.9 2.7 2.6 3.2 2.7 73 149 60 IS 3.4 24 5.0 2.8 2.S 2.7 2.6 3.3 2.7 102 172 70 19 3.6 25 5.0 2.S 2.8 2.7 2.6 3.3 2.7 92 186 82 33 3.6 26 5.0 3.0 2.6 2.7 2.6 3.3 2.8 72 173 62 28 3.8 27 5.0 3.0 2.8 2.8 2.6 3.2 2.9 62 127 51 23 4,0 28 5.4 3.0 2.8 2.9 2.6 3.1 3.0 82 115 47 18 3.8 29 5.7 3.2 2.8 2.9 2.6 3.1 3.0 114 157 46 16 4.0 30 7.2 3.2 2.S 2.9 - 3.1 5.1 156 165 44 14 3.4 31 6.8 ~ 2.8 2.9 - 3.1 - 159 ~ 46 13 - Runoff in Month folS^s »*>«* «»i Mean acre- feet

October...... 169.2 7.6 3.6,, 5.46" 336 November...... 138*1 3*1 2*8 4.27 254 Decsmber ...... 89.6 3.2 2.3 2.89 178 Calendar year 1943 ...... 13,013.5 237 « 2.2 35.7 25,S20 January...... 84*8 2»9 2 #7 2.74 168 February...... 75 7 2»9 2*4 2.61 150 March...... 9lU s',3 2.S 2.95 181 .April...... 92.2 3.3 2.7 3.07 183 May...... 1,414.3 159 3.1 45.6 2,810 June ...... 3,777 186 47 126 7,490 July...... 2,883 167 44 93.0 5,720 August ...... 812 42 13 26.2 1,610 September ...... 171.4 12 3.4 5.71 340 Water year 1943-44 ...... 9,788.7 186 2.4 26.7 19,420 * Winter discharge measurement made on this day. ^ Hote.- Ho gage-height record Dec. 1 to May 18 (stage-discharge relation affected by iee during most of period!; discharge computed on basis of 4 discharge measurements made near mouth and weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. _ TRIBUTARIES ABOVE GUNNISON RIVER '

Black Creek above Green Mountain Reservoir, Colo.

Location.- Water-stage recorder,.lat. 39°51'15B , long. 106°15'10*, In NEi>sec. 29, T. 2 S., R. 79 W., at bridge on State Highway 9, 400 feet upstream from high-water line of Green Mountain Reservoir and 16 miles southeast of Kremmllng. Drainage area.- 18.2 square miles. Records available.- Way to September 1944. Extremes.- Jtelmum discharge during period, 184 second-feet June 25 (gage height, 2.24 .feetj; minimum dally, 3.1 second-feet Sept. 22, 28. Remarks.- Records fair except those for Aug. 25 to Sept. 30, which are poor. Small diversions above station for irrigation.

Discharge, In second-feet, Bay to September 1944 Day Bay June July Aug. Sept. Day Bay June July Aug. Sept, 1 _ 186 135 42 10 16 - 125 80 20 4.1 2 _ 101 136 41 9.0 17 - 116 78 18 3.7 3 . 78 130 41 8.2 IS - as 66 18 3.5 4 _ 59 138 38 7.5 19 - 120 72 20 3.3 5 _ 41 140 35 7.1 20 36 142 S4 21 3.3 6 H 37 126 31 7.1 21 37 149 82 19 3.2 7 _ 58 117 29 7.1 22 46 162 73 16 3.1 a _ 68 103 29 6.3 23 84 138 69 15 3.2 9 . 79 104 2S 5.7. 24 113 157 79 15 3.3 10 _ 120 112 2S 5.3 25 109 168 90 27 3.4 11 _ 127 109 26 5.S 26 90 159 73 27 3.3 12 _ 112 96 ' 21£4 5.0 27 78 125 58 22 3.2 13 _ 84 S2 4.7 2S 90 136"105 52 18 3.1 14 . 99 77 19 4.7 29 US 50 14 3.7 15 _ 97 78 IS 4.5 SO 138 142 47 13 4.7 31 132 - 47 11 - Second- Runoff In Honth foot-days Maximum Minimum He an acre-feet 89.2

1.4SO September ...... 149.6 10 3.1 4.99 297 The period...... - - - - 15,980 Ot,ter Creek above Green Mountain Reservoir, Colo.

Location.- Water-stage recorder, lat. 39°51'10", long. 106°16'00", In Nfci sec. 29, T. 2 S., R. 79 W., at State Highway 9, 1,000 feet upstream from high-water line of Green Mountain Reservoir and 16 miles southeast of Kremmllng. Drainage area.- 9.4 square miles. Records available.- my to September 1944. Extremes.- Maximum discharge during erlod, 34 second-feet June 1 (gage height, 1.03 feet), from rating curve extended above 0 second-feet; minimum dally, 0.5 second-foot Sept. 10, 13-16, 18-23, 27-30. Remarks.- Records good. Small diversions above station for Irrigation. Cooperation.- Seven discharge measurements and gage-height record furnished by Bureau of Reclamation. Discharge, In second-feet, Bay to September 1944 Day Bay June July Aug. Sept. Day Bay June July Aug. Sept. 1 . 32 14 2.4 1.1 16 _ 26 6.1 1.8 0.5 2 W 31 14 2.4 1.3 17 _ 24 5.7 l.S .7 3 - 26 13 2.2 1.3 18 _ 21 4.9 l.S .5 - 23 13 2.0 1.1 19 .. 22 4.9 2.2 .5 - 17 IS 2.2 1.1 20 S.5 37 5.7 2.4 .5 - 19 12 2.0 1.1 21 S.5 29 6.1 2.2 .5 _ 25 10 2.0 1.1 22 11 31 5.3 2.0 .5 - 26 9.5 1.8 .9 23 15 28 4.9 1.8 .5 _ 25 9.0 1.8 .9 24 17 28 5.3 1.6 .7 10 » 31 9.0 1.8 .5 25 17 25 5.7 1.6 .7 11 - 30 8.5 1.6 .7 2.6 15 22 4.9 -1.6 .7 12 - 26 7.5 1.6 .7 27 12 17 3.S 1.6 .5 _ 22 7.0 1.8 .5 2S 13 14 2.6 1.3 .5 » 23 6.1 l.S .5 29 14 15 2.4 1.3 .5 - 22 6.1 1.8 .5 30 19 15 2.6 1.3 .5 31 2S 2.4_J 1.1 Second- Bonth Maximum Runoff In foot-days Minimum Bean acre-feet.

722

21.6 1.3 .5 .72 43 The period ...... - - - . 2,380

Time baalsi Bountsln war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE QUNNISON RIVER - TO Cataract Creek above Green Mountain Reservoir, Colo.

Location.- Water-stage recorder, lat. 39°51'00", long. 106S17'25", In NEi sec. 25, T. iiS., R. 80 w., at Lawson Ranch, 1 mile upstream from high-water line of Green Mountain Reservoir and 16 miles southeast of Kremmllng. Drainage area.- 15.5 square miles. Records available.- May to September 1944. Extremes.- Maximum discharge during period, 218 second-feet May 31 (gage height, 2.01 reetj; minimum dally, 0.2 second-foot Sept. 22-26. Remarks.- Records good. A few small diversions above station for Irrigation.

Discharge, in second-feet. May to September 1944 Day May June July Aug. Sept. Day May June July Aug. Sept. 1 - 111 94 14 2.5 16 _ 117 31 5.7 0.8 2 91 34 14 2.2 17 _ 101 2S 6.1 .S 3 - 75 S4 S.I 3.2 IS _ 79 26 7.3 1.1 4 - 62 87 8.5 3.0 19 M 99 27 6.1 .6 5 - 43 91 12 3.0 20 _ 130 32 5.7 .4 6 3S S2 14 1.7 21 49 146 30 5.7 .4 7 - 54 75 7.3 1.4 22 31 138 28 4.9 .2 S - 60 66 7.3 1.0 23 49 119 24 4.2 .2 9 - S7 60 11 .6 24 56 138 24 3.S .2 10 « 106 60 7.7 .S 25 69 151 26 4.5 .2 11 - 109 60 7.3 .S 26 54 - 114 23 6.1 .2 12 79 51 6.5 .8 27 49 96 21 4.9 1.1 13 77 51 5.3 .8 2S 60 99 27 4.0 .6 14 - 84 37 7.7 .6 29 75 111 18 3.5 .3 15 - S7 33 7.3 .6 30 S9 104 14 3.0 .3 31 119 - 13 3.0 - Second- Month Maximum Minimum Mean Runoff in foot-daya acre-feet 700 45 7 429 * The period - - - - 10,450

Elllott Creek feeder canal to Green Mountain Reservoir, Colo.

Location.- Water-stage recorder, lat. 39°52'10", long. 106°20'00", In SEi sec. 15, T. 2 S., R. 80 W., Just upstream from high-water line of Green Mountain Reservoir, three- quarters of a mile downstream from head gate, and 14 miles southeast of Kremmllng. Records available.- May to September 1944. Extremes.- Maximum discharge during period, 155 second-feet June 21 (gage height, 2.77 feet); minimum dally, 1.2 second-feet Sept. 9, 10, 13, 14, 17. Remarks.- Records excellent. Elllott Creek feeder canal diverts all the flow of Elllott Creek to Green Mountain Reservoir except during extreme high water. Drainage area of Elllott Creek above head gate of canal, 15.4 square miles. Discharge, in second-feet, May to September 1944 Day May June July Aug. Sept. Day May June July Aug. Sept. 1 _ 121 62 6.7 1.4 16 - 117 5.5 4.7 1.4 2 M 98 51 6.7 1.4 17 100 5.2 3.5 1.2 3 _ S2 39 6.4 1.3 IS « 88 3.1 2.2 1.6 4 _ 68 53 5.S 1.3 19 - 102 2.2 2.0 2.0 5 ' M 64 58 6.1 1.3 20 > 126 2.0 l.S 2.3 6 _ 56 39 5.5 1.3 21 - 129 1.8 1.6 1.8 7 _ 51 26 5.5 1.4 22 22 122 1.8 1.6 1.8 S 54 20 5.S 1.3 f-3 43 104 1.6 1.6 2.0 9 _ 59 17 5.8 1.2 69 111 l.S 1.6 2.2 10 _ 112 17 5.S 1.2 25 71 112 2.0 1.6 2.4 11 107 9.S 5.S 1.6 26 76 90 4.4 1.6 2.4 12 _ 88 9.S 5.2 2.0 27 70 73 5.2 1.4 2.2 13 M 90 7.0 5.8 1.2 28 82 6S 6.7 1.6 2.4 14 _ 100 6.1 4.7 1.2 29 88 77 7.6 1.6 2.7 15 _ 94 5.5 4.4 1.4 30 96 68 7.6 1.4 2.2 31 120 - 7.3 1.4 - Second- Month Runoff in foot-days Maximum Minimum Mean acre -feet May 22-31 ...... 737 120 22 73.7 1,460

51.0 2.7 1.2 1.70 101 - - - - 8,180

Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 070650 O - 45 - 6 74 TRIBUTARIES ABOVE GUNNISON RIVER

Piney River near State Bridge, Colo.

Location.- Water-stage recorder, lat. 39°48', long. 106°35', in sec. 16, T. 3 S., R. 82 W., at Perry Olsen Ranch, just downstream from Rock Creek and 6 miles southeast of State Bridge. Prior to July 29, 1944, staff gage at sane site and datum. Drainage area.- 82.6 square* miles. Records available.- May to September 1944. Extremes.- Maximum discharge observed during period, 534 second-feet May 30 (gage height, 2.46 feet), from rating curve extended above 350 second-feet, but probably higher previous to beginning of record; minimum daily, 2.9 second-feet Sept. 21. Remarks.- Records good except those above 400 second-feet, which are fair, Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 _ 490 225 35 5.5 2 _ 430 215 33 5.2 3 .. 394 202 29 5.5 4 _ 32S 222 28 5.8 5 - 296 21S 27 5.5 6 _ 300 1S9 26 5.0 7 _ 362 173 25 5.5 8 _ 582 152 24 5.0 9 _ 454 136 24 4.2 10 - 510 125 22 4.2 11 _ 47S 123 21 4.5 12 _ 426 106 17 3.S 13 _ 394 92 15 3.3 14 _ 403 84 15 3.3 15 - 394 80 16 3.3 16 _ 442 74 17 3.5 17 _ 390 67 12 3.3 18 _ 332 62 10 3.3 19 _ 370 62 12 3.1 20 - 414 64 13 3.1 21 _ 406 61 10 2.9 22 _ 394 61 9.5 3.1 23 . 339 5S 9.0 3.3 24 _ 346 61 9.0 3.3 25 - 343 66 17 3.5 26 _ 321 50 13 3.5 27 _ 264 46 9.0 3.5 28 _ 232 45 7.5 3.5 29 . 264 45 7.0 3:8 30 530 264 43 7.0 3.8 31 522 - 39 6.0 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... November...... December ...... Calendar year ...... January ...... February...... March...... April ...... May...... June ...... 11,161 510 232 372 22,140 July...... 3,248 225 39 105 6,440 August ...... 525.0 35 6.0 16.9 1,040 September...... 120.1 5.8 2.9 4.00 238 The period . ... _ _ _ _ 29 ,660 Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 75 Eagle River at Redcllff, Colo. Location.- Water-stage recorder, lat. 39°30'25n , long. 106 022'00n , In SWi sec. 6, T. 6 s., R. 80 W., at Redcllff, a third of a mile upstream from Turkey Creek. Datum of gage Is 8,652.02 feet above mean sea level, datum of 1929. Prior to May 25, 1944, staff gage at site 1,000 feet downstream at different datum. Drainage area.- 72.2 square miles. Records available.- October 1910 to September 1925, May to September 1944. Average discharge.- 15 years (1910-25), 68.1 second-feet. extremes.- naxli discharge during period May to September, 275 second-feet May 25 (gage neignt, 3.20 feet, from partly estimated gage-height record); minimum dally,"13 second- feet Sept. 21-25, 28-30. 1910-25, 1944: Maximum discharge observed, 1,010 second-feet June 5, 1912 (gage ' height, 4.0 feet, site and datum then In use), from rating curve extended above 500 second-feet; minimum dally, 1 second-foot Oct. 15, 1917. Remarks.- Records excellent except those for May 25-28, which are fair. 1,950 acre-feet diverted In 1944 by Ewlng, Wurtz, and Columbine ditches to Arkansas River Basin. Discharge, In second-feet, Hay to September 1944

Day Hay June July Aug. Sept. Day May June July Aug. Sept. 1 - 175 56 21 17 16 - 1O9 36 18 14 2 _ 166 56 21 16 17 . 102 31 16 14 Z - 157 56 22 16 18 - 99 30 16 14 4 - 145 55 21 16 19 - 92 28 ie 14 5 - 132 55 20 16 20 - 88 31 17 15 6 _ 124 50 23 16 21 - 79 35 18 13 7 - 126 46 23 14 22 - 74 32 17 13 8 - 124 43 22 14 23 - 67 29 17 13 9 - 134 41 20 14 24 - 74 31 18 13 10 _ 157 4.0 20 14 25 f233 79 35 21 13 11 - 160 39 20 14 26 a200 74 28 19 14 12 _ 154 36 19 14 27 a!60 68 25 19 14 13 - 142 36 20 14 28 a!70 63 24 18 13 14 _ 129 34 19 14 S9 192 62 23 18 13 15 _ 119 34 19 14 30 185 60 23 18 13 31 165 - 22 .18 - Second- - ~ Month Runoff In foot-daya Maximum Minimum Mean aere-feet 23^ 22 19 2 426 17 13 14.2 845 The period...... - - - - 13,520 a No gage-height record; discharge computed on basis of records for stations on nearby streams. f Computed on basis of partly estimated gage-height record. Turkey Creek at Redcllff, Colo. Location.- Water-stage recorder, lat. 39°30'50", long. 106022 I 05n , In sec. 19, T. 6 S., R. 'bO W., at Redcllff, 800 feet upstream from mouth. Datum of gage Is 8,639.42 feet above mean sea level, datum of 1929. Prior to May 25, 1944, staff gage at same site but different datum. Drainage area.- 28.6 square miles (revised). Records available.- June 1913 to September 1921, May to September 1944. extremes.- Maximum discharge during period, 265 second-feet June 10 (gage height, 3.49 reet;, from rating curve extended above 125 second-feet; minimum dally, 5.5 second-feet Sept. 18, 19. 1913-21, 1944: Maximum discharge observed, 670 second-feet June 13, 1918 (gage height, 4.7 feet, datum then In use); minimum discharge, 1 second-foot Oct. 21, 1919 (gage height, 1.34 feet, datum then In use). Remarks.- Records fair. A few small diversions above station for Irrigation. Discharge, in. seiond-feet. Hay to September 1944 Day Hay June July Aug. Sept. Day Hay June July Aug. Sept. _ - 1 152 68 19 '6.76.7 16 157 a33 11 5 6'8 2 157 66 19 17 - 146 a3O 10 3 _ 144 62 18 6.7 18 - 138 a28 11 5 5 4 _ 132 60 17 6.4 19 - 140 a26 12 5 5 5 _ 118 53 16 6.4 20 _ 146 a27 9 8 5 8 6 _ 116 49 16 6.4 21 _ 142 a29 9 4 5 8 7 _ 120 47 15 6.4 22 - 136 * 27 9 O 5.* 8 « 128 44 15 6.4 23 - 132 26 e 2 5 8 9 161 a42 15 6.1 24 104 124 28 9 4 5 8 1O _ 231 a40 13 6.1 25 106 116 28 11 5 8 11 _ 223 a38 12 6.1 26 100 112 24 8 2 5 8 12. _ 2O1 a36 IK 6.1 27 88 106 23 7 8 5 8 13 _ 185 a34 11 5.8 28 92 86 22 7 8 6 1 14 _ 181 a33 11 s.e 29 106 79 23 8 2 5 8 15 ^ 172 a32 11 5.8 3O 136 72 21 8 t 5 e 31 150 - 2O 7 4 - Seoond- Runoff In Month foot-days Maximum Minimum Mean acre-feet

231 72 . 2*2206 440 1*-) 180.6 6.7 5.5 6.08 358

a No gage-height record; discharge computed on basis of record for Qore Creek near Hinturn. Time basis; Mountain war time. To convert war time to standard time, subtract 76 TRIBUTARIES ABOVE GUNNISON RIVER

Homestake Creek near Redcliff, Colo. Location.- Water-stage recorder, lat. 39°29', long. 106°22', in sec. 6, T. 7 S., R. 80 W., 3 miles upstream from mouth and 3 miles south of Redcllff. Prior to May 25, 1944, staff gage at .site 2i miles downstream at different datum. Draina e area.- 58.9 square miles. (Drainage area at site 2i miles downstream, 63.4 squ re miles , revised . ) Records available.- May to September 1944. October 1910 to September 1918 at sites near moutn puoiisnea as Homestake Creek at Redcliff 1911-16 and near Redcllff 1917-18. Records practically equivalent. Extremes.- Maximum discharge during period, 754 second-feet May 31 (gage height, 3.74 reet), from rating curve extended above 370 second-feet: minimum dally, 3.6 second- feet Sept. 19-22. 1910-18, 1944: Maximum discharge observed, 1,300 second-feet June 24, 1918 (gage height, 6.2 feet, site and datum then In use); minimum observed, 0.6 second-foot Jan. 25, 1915 (discharge measurement). Remarks.- Records excellent except those for period of no gage-height record, which are rair. No diversion above station.

Discharge, In second-feet, Hay to September 1944 Day Bay June July Aug. Sept. Day May June July Aug. S«pt. 1 . 470 281 36 7.0 16 - 410 101 13 3.8 Z 390 273 35 6.5 17 - 336 S9 12 3.8 3 - 341 328 33 5.5 18 32S S4 11 3.8 4 - 237 314 34 5.0 19 405 82 11 3.6 5 1S7 265 26 4.7 20 470 91 11 3.6 . 6 _ 197 225 25 4.4 21 450 95 11 3.6 . 7 - 285 190 23 4.4 22 - 425 79 13 3.6 8 - 273 160 23 4.4 23 370 70 14 3.7 9 390 158 23 4.1 24 440 S4 15 3.7 10 - 522 14S 22 4.1 25 390 460 93 16 3.7 11 485 145 20 4.1 26 310 395 : 74 15 3.7 12 « 390 126 18 4.0 27 233 305 59 12 3.7 13 - 328 113 16 4.0 28 305 273 50 11 3.7 14 355 103 15 4.0 29 440 310 46 9.0 3.S 15 355 101 14 4.0 30 555 332 44 9.0 3.8 31 572 - 39 S.5 - Second-* Runoff In Honth foot-days Maximum Hlnimum Mean acre-feet 233

250 ' 36,710 Note.- Ho gage-height record Sept 12-30} discharge computed on basis of record for Eagle River at Redcliff. Gore Creek near Minturn, Colo. Location.- Water-stage recorder, lat. 39°37', long. 106°26', In SWi sec. 14, T. 5 S., R. 81 W., at private bridge 1 mile upstream from mouth and 2 nlles north of Minturn. Drainage area.- 100 square miles. Records available.- May to September 1944. Extremes.- Maximum discharge recorded during period, 864 second-feet June 9 (gage height, 4.22 feet), from rating curve extended above 650 second-feet, but may have been higher on June 10; minimum dally, 18 second-feet Sept. 19-30. Remarks.- Records good except those for June 10-15, which are fair. A few small dlver- slons above station for Irrigation. Discharge, In second-feet. Hay to September 1944 Day May June July Aug. Sept. Day Bay June July Aug. Sept. 1 _ 720 425 73 24 16 - 720 162 37 19 2 _ 670 410 68 23 17 - ,681 150 35 19 3 _ 406 66 22 18 - 664 133 35 19 4 _ 485 61 22 19 - 725 133 39 IS 5 406, 370» 57 22 20 - 747 138 38 IS 6 56 22 21 - 752 129 36 IS 7 _ 535 286 53 21 22 - 708 L25 35 18 S _ 535 27S 50 21 23 - 676 116 34 9 _ 670 262 47 20 24 - 681 133 35 le 10 _ a 850 250 46 20 25 - 681 46 11 _ aSlO 232 44 20 ' 26 515 626 116 37 12 _ a760 202 41 20 27 495 593 105 32 18 13 _ f725 190 39 20 28 560 550 97 31 18 14 _ t a720 180 39 20 29 686 540 68 29 18 15 _ a714 175 36 19 30 764 4SO i 91 29 18 31 758 - 24 ~ Second- Month Runoff In foot-days Maximum Minimum Mean acre-feet

July...... 24 September ...... 589 24 18 19.6 1,170 The period ...... - - - - 62,330 a No gage-height record; discharge computed on basis of record for Turkey-Creek at ted on basis of partly estimated gage-height record. T sis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 77

Roaring Fork at Aspen, Colo.

Location.- Water-stage recorder, lat. 39°11'20", long. 106°48'55", In sec. 7, T. 10 S., R. H4 W., at Aspen, three-quarters of a mile upstream from Hunter Creek. Datum of gage is 7,884.58 feet above mean sea level, datum of 1929. Drainage area.- 109 square miles. ftecoras available.- January 1911 to September 1921 and January 1934 to September 1944 in reports of Geological Survey. January 1911 to September 1921 and April 1932 to September 1944 In reports of state engineer. Records since May 24, 1935, equivalent to earlier records if flow through Twin Lakes tunnel is added to flow past station. Average discharge.- 22 years (1911-21, 1932-44), 158 second-feet r Including diversion by Twin LaKes tunnel. Extremes.- Maximum discharge during year, 565 second-feet June 22 (gage height, 3.45 feet); minimum dally, 4.0 second-feet Sept. 21, 22. 1911-21, 1932-44: Maximum discharge, 3,170 second-fset June 18, 1917 (gage height, 7.2 feet, site and datum then In use, from high-water marks), from rating curve extended above 1,200 second-feet; minimum daily, 15 second-feet July 15, 16, 1934; minimum dally since diversion through Twin Lakes tunnel began, 3.2 second-feet Aug. 15, 1940. Remarks.- Records excellent above 30 second-feet and fair below. Transmountaln diversion at point 15 miles upstream through Twin Lakes tunnel to Arkansas River Basin since May 24, 1935. Cooperation.- Records of diversion by Twin Lakes tunnel furnished by state engineer.

(Shifting-control method used Feb. 25 to Har. 6, Mar. 9-27, Mar. 30 to Apr. 5, Aug. 12-31) 0.6 3.4 1.4 24 1.9 72 2.7 250 .9 5.3 1.5 31 2.0 S6 3.0 360 1.0 7.7 1.6 39 2.3 142 3,2 440 1.2 14 1.7 49 2.5 190 3,4 540

Discharge, in second-feet, water year October 1943 to September 1944 Da, Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 44 34 28 21 20 20 20 31 495 268 33 12 2 42 30 29 21 20 20 20 33 475 273 35 11 3 39 35 2S 22 20 20 21 30 450 28S 32 11 4 37 35 28 22 20 20 22 2S 424 247 29 10 5 37 37 28 20 31 20 23 33 383 22S 27 9.4 6 37 36 29 21 21 20 24 43 356 207 28 S.O ' 7 36 36 2S 22 20 18 24 59 336 132 27 5.5 8 35 34 26 21 20 IS 25 62 324 162 25 .3 9 33 34 2S 20 21 20 26 72 320 153 25 .a 10 33 36 28 21 30 21 25 SS 364 144 27 ,9 11 35 35 26 22 19 21 25 S3 412 134 24 .9 12 41 35 25 22 19 21 30 104 408 122 22 .7 13 4O 35 26 21 20 21 32 160 400 115 19 .7 14 43 34 27 19 20 20 29 234 3SO 104 18 .5 15 41 36 25 21 20 20 27 320 368 99 IS .5. 16 42 33 34 23 19 20 27 392 364 10S 18 .7 17 43 33 23 22 22 25 360 352 93 16 .4 18 41 33 24 21 20 23 26 223 336 85 16 .4 19 43 32 26 21 19 20 2S - 190 324 SO 16 .2 20 41 31 25 21 20 22 27 224 356 93 17 .2 21 36 33 25 *21 21 22 26 260 400 S3 24 .0 22 41 34 25 21 21 20 27 273 450 76 24 .0 23 38 36 24 22 20 21 25 292 3S4 70 22 .7 24 33 34 23 21 20 20 3S 388 412 73 21 .2 25 37 31 23 20 21 21 28 392 416 76 30 .7 26 37 30 23 19 20 21 *29 376 412 62 24 5.8 27 35 26 21 20 20 22 35 309 352 57 22 5.8 28 41 27 21 20 20 20 38 344 316 50 20 5.5 29 41 2S 22 19 21 20 33 416 320 47 19 5.1 30 38 -27 22 19 21 32 424 306 4S 19 5.1 31 37 20 20 20 495 43 13 Diversion Adjusted for Observed by diversion Month Twin Lakes Mean foot^s Vaximat Minimum Mean Runoff In tunnel Runoff In (second- acre -feet (acre-feet) acre-feet feet) Octo 6 44 33 38.6 2,370 303 2,670 43.5 Hove 0 37 26 33.0 1,960 533 2,490 42.0 Deoe;Bbsr...... 732 29 20 25.2 1,550 540 2.O90 34.0 Calendar year 1943.. 34, 197 555 IS 93.7 67.S10 4S,780 116,600 161 Janu 64 6 23 19 20.8 1.2SO 277 1,560 25.3 Febr 3 21 19 20.1 1,160 303 1,460 25.4 Marc h...... 634 «S2 18 20.5 1,260 108 1,370 22.2 April ...... eo6 38 20 26.9 1,600 95 1,700 23.5 Uav 6,74 S 495 2S 218 13,3SO 5,870 19,250 313 June ...... 11,420 495 306 381 23,650 80,000 42,650 717 July ...... 3,900 288 43 126 7,740 S.370 16,110 362 Augu St...... 715 38 13 23.1 1,420 i,020 2,440 39.6 Sept^mber. 176.1 12 4.0 5.87 349 313 662 I'l.l Water year 1943-44 28, 596.1 495 4.0 78.1 56,730 37,730 94,450 130 * Winter discharge measurement made on this day. Hote.- Stage-discharge relation affected by Ice Hov. S, 9, Nov. 26 to Dec. $i\, Jan. El to Feb. 84, Har. 7, 8, S3, 29. Ho gage-height record Jan. 1-20 (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 78 TRIBUTARIES ABOVE GUNNISON RIVER Roaring Fork at Glenwood Springs, Colo. Location.- Water-stage recorder, lat. 39°33', long. 107°20', In sec. 9, T. 6 S., R. 89 W., at Glenwood Springs, 1,500 feet upstream from mouth. Datum of gage Is 5,720.73 feet above mean sea level, adjustment of 1912. Drainage area.- 1,460 square miles. Records available.- October 1905 to September 1909, September 1910 to September 1931, and October 1933 to September 1944 In reports of Geological Survey. April 1906 to September 1909 and September 1910 to October 1944 In reports of State engineer. Records of monthly discharge prior to October 1938 have been republlshed, with some revisions and additions, In Water-supply Paper 918. Average discharge.- 38 years (1905-9, 1910-44), 1,481 secondr-feet. Extremes.- Maximum discharge during year, 7,360 second-feet June 25 (gage height, 5.04 feet); minimum dally, 310 second-feet Mar. 7, 8. 1905-9, 1910-44: Maximum discharge, 17,600 second-feet-June 14, 1918, June 14, 1921; minimum, 145 second-feet Jan. 21, 1935 (gage height, 0.65 foot); minimum dally, 179 second-feet Jan. 21, 1935. Remarks.- Records excellent. Diversions above station for Irrigation. Transmountaln diversion through Twin Lakes and Busk-Ivanhoe tunnels to Arkansas River Basin. Total flow diverted by Twin Lakes tunnel during water year 1943-44 was 37,730 acre-feet (see preceding page), and that by Busk-Ivanhoe tunnel from Frylngpan River was 2,060 acre- feet. Cooperation.- Record of diversion by Twin Lakes and Busk-Ivanhoe tunnels furnished by State engineer.

Rating tatle, water year 1943-44 (gage height, in feet, and discharge in second-feet) (Shifting-control method used Oct. 1-31) O.S 2S4 1.6 860 3.7 4,040 1.0 356 2.0 1,330 4.3 5,440 1.2 470 2.6 2,070 5.2 7,780 1.4 660 3.1 2,S40

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. 'Sept. 1 542 590 437 356 366 332 336 600 5,520 5,060 1,140 457 2 551 542 470 336 370 348 332 670 5,180 5,040 1. 090 450 3 533 533 424 394 344 34S 336 630 4,700 5,390 1, 030 437 4 542 560 424 3SO 366 340 366 560 3,S20 4,920 970 424 5 542 570 437 313 366 340 404 560 3,130 4,550 893 411 6 533 560 463 370 356 328 444 720 2,930 4, -280 882 4O4 7 553 524 457 411 356 310 450 1,070 3,440 3,7SO 840 399 8 524 48S 457 336 361 310 463 1,270 3,460 3,400 760 399 9 524 515 450 320 370 344 497 1,500 3,930 3,340 790 404 10 515 542 437 385 356 34S 470 1,760 5,230 3,300 800 404 XX 515 533 394 411 320 348 463 1,850 5,55O 3,160 750 399 12 580 524 380 380 340 352 570 2,040 5,230 2,730 710 399 13 560 524 411 356 356 370 670 2,630 4,7,00 2,520 670 394 14 551 524 437 361 336 380 580 3,460 5,040 2,380 650 394 15 551 515 404 457 348 361 551 4,350 4,890 2,210 630 390 16 551 506 394 479 320 340 470 5,230 5,490 2,070 620 394 17 551 497 375 417 332 356 444 5,230 4,680 2,000 610 390 18 542 506 385 430 34S 366 430 3,540 4,480 1,910 580 385 19 560 506 437 424 320 340 444 2,700 4,940 1,850 580 385 20 590 488 430 437 324 348 -437 2,530 5,830 1,910 570 385 21 570 470 417 417 352 352 437 2,700 5,960 1,810 570 370 22 580 479 404 417 352 332 417 3,110 5,910 1,740 542 366 23 590 48S 404 444 328 336 404 3,930 5,310 1,620 515 361 24 580 488 399 399 332 340 411 4,820 5,700 1,670 506 366 25 560 479 370 375 344 328 437 4,630 6,320 1,680 551 366 26 580 450 3S5 340 336 336 437 4,630 6,170 1,530 551 366 27 560 3S5 366 366 328 332 470 3,910 5,700 1,430 515 361 28 570 4O4 328 370 336 316 650 4,000 4,750 1,330 506 361 29 630 417 332 366 328 313 6SO 4,800 5,080 1,290 488 366 30 630 399 394 344 - 336 590 5,390 5,210 1,280 479 356 31 620 ~ 370 361 ~ 340 - 5,730 " 1,220 463 ~ Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 17,360 630 515 560 34,430 November...... 15,006 590 385 500 29,760 December ...... 12,672 470 32S 409 25,130 Calendar year 1943 ...... 474,644 7,830 250 1,300 941,400 January . . 11,952 479 313 386 23,710 February...... 9,991 370 320 345 19,820 March 10,570 380 310 341 20,970 April ...... 14,090 680 332 470 27,950 Hay 90,550 5,730 560 2,921 179,600 June ...... 148,280 6,320 2,930 4,943 294,100 July 82,400 5,390 1,220 2,656 163,400 August ...... 21,271 1,140 463 686 42,190 September...... 11,743 457 356 391 23,290 Water year 1943-44 ...... 445,885 6,320 310 1,218 88^,400 Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISON RIVER 79

Crystal River near Redstone, Colo".

Location.- Water-stage recorder, lat. 39°18', long. 107°13', In NEi sec. 9, T. 9 S., R. HH w., 75 feet downstream from Nettle creek and 7 miles downstream from Redstone. Datum of gage Is 6,485.07 feet above mean sea level, unadjusted. Drainage area.- 197 square miles. Records available.- May 1935 to September 1944. 1908-9 at site 3 miles downstream; records not equivalent. Extremes.- Maximum discharge during year, 2,870 second-feet June 25 (gage height, 4.78 reet); minimum dally, 51 second-feet Mar. 8. 1935-44: Maximum discharge, 4,400 second-feet June 21, 1938 (gage height, 5.96 feet), from rating curve extended above 2,400 secdnd-feet; minimum observed, 32 second-feet Jan. 19, 1943 (discharge measurement). Remarks.- Records good except those for period of no gage-height record, which are fair. Diversions above station for Irrigation. '

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Ang. Sept. 1 9S 117 S2 74 66 67 67 156 1,630 2,200 375 100 2 94 100 S9 72 6S 64 67 170 1,650 2,010 355 96 3 S9 97 79 76 64 63 74 155 1,500 2,210 339 94 4 84 103 eo 76 66 61 S6 146 1,210 2,200 310 94 5 S3 101 86 74 67 63 102 160 970 2,040 272 88 6 S2 100 84 74 62 5S 105 232 930 1,960 26S 86 7 76 93 64 76 64 55 114 324 1,150 1,720 259 82 8 74 83 S6 72 67 51 122 367 1,120 1,610 250 80 9 77 89 84 70 6S 6S 129 456 1,330 1,650 256 80 10 76 89 83 72 65 65 122 543 1,730 1,640 241 77 11 S3 S9 70 74 57 65 137 592 1,870 1,500 223 77 12 112 S7 65 72 63 66 149 674 1,770 1,260 205 76 13 101 S7 75 72 59 70 164 920 1,630 1,130 190 75 14 104 S4 79 74 60 70 140 1,200 1,S30 1,040 185 71 15 100 83 77 74 59 68 133 1,510 1,740 980 188 69 16 100 83 74 76 62 64 129 1,630 1,900 774 188 68 17 9S 82 70 77 62 66 116 1,460 1,710 790 172 es 18 97 83 74 74 .61 68 110 1,030 1,740 743 166 67 19 112 82 84 72 56 65 111 758 2,000 70S 160 66 20 104 S2 83 74 58 6S 111 694 2,270 766 153 66 21 104 SO 80 *75 61 67 105 790 2,240 708 142 65 22 104 «eo 79 74 60 64 103 1,000 2,220 650 133 64 23 104 84 77 74 59 64 100 1,360 2,070 59S 186 '64 24 96 84 76 72 63 66 10S 1,530 2,270 B14- 128 64 25 101 82 70 70 60 64 113 1,510 2,420 576 144 64 26 101 75 79 64 60 65 116 1,490 2,430 526 129 64 27 97 69 70 64 60 64 133 1,430 1,990 480 119 64 28 103 70 57 66 61 60 166 1,430 1,S20 442 113 64 29 114 70 74 64 60 60 156 1,600 2,130 442 108 64 30 115 75 79 62 63 147 1,720 2,130 433 105 62 31 120 72 . 64 66 1,680 415 100 Seccnd- Runoff in Month foot-days Maximum Minimum Mean acre-feet

Goto ber...... 3,003 ISO 74 96.9 5,960 Nove 2/5S3 117 65 86.1 5,120 Deoember...... 2,401 1 _ _ _ _ 8f 57 77.5 4,760 Calendar year 1943 ...... 141,122 2,680 35 3S7 279,900 , Janu ary 2,224 77 6£ 71.7 4,410 Febr 1,798 68 5 62.0 3,570 llaro 1,990 70 51 64.2 3,950 Apri 1...... 3,535 166 67 118 7,010 May. 28,717 1,720 14E 926 56,960 June 53,450 2,430 93C 1,7S2 106,000 July 24,815 2,210 41E 1,123 69,050 Augu 6,102 375 10C 197 12,100 September...... 2,21S 100 61 73.9 4,400 Water year 1943-44 ...... 142,836 2,430 53 390 283,300 * Winter discharge measurement made on this day. Hote.- Ho gage-height record Dec. 31 to Feb. 4, Feb. 14-16 (stage-discharge relation probably affected by Ice during entire period); discharge computed on. basis of 1 discharge measurement and weather records. Time baa Is I Mountain war time. To convert war time to standard time, subtract 1 hour. 80 TRIBUTARIES ABOVE OUNNISON RIVER

Fourmlle Creek near Carbondale, Colo.

Location.- Water-stage recorder, lat. 39°24', long. 107°23', In SEi sec. 36, T. 7 S., R. so w., at Holy Cross National Forest boundary, 9 miles west of Carbondale. Drainage area.- 8.0 square miles. Records available.- April 1942 to September 1944 (no winter records). Extremes.- Maximum discharge during year, 146 second-feet my 15 (gage height, 2.86 feet), rrom rating curve extended above 75 second-feet; no flow Aug. 11-13,-17-24, Aug. 30 to Sept. 30. 1942-44: Maximum and minimum discharges, those of 1944. Remarks.- Records excellent except those below 2 second-feet and those for periods of ice effect or no gage-height record, which are fair. No diversion or regulation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.3 0.5 0.7 l.S 38 4.2 0.3 2 .3 .4 .7 2.2 36 3.4 .2 3 .2 .5 .7 3.0 35 3.2 .1 4 .2 .S .8 4.0 35 2.S .1 5 .£ .5 .8 5.0 32 2.5 .1 6 .2 .4 .S 9.0 31 2.3 .1 7 .2 .4 .8 18 35 1.9 .1 8 .2 .3 .8 35 36 1.8 .1 9 .£ .4 .8 45 33 1.7 .1 10 .3 .5 .8 54 35 1.9 .1 11 .4 .6 .8 53 31 1.8 0 1? .e .6 .9 68 27 1.7 0 13 .e .6 1.0 82 25 1.5 0 14 .6 .6 .9 88 31 1.5 .1 IS .6 .6 .8 99 22 2.5 .1 16 .5 .6 .8 106 20 1.5 .1 17 .5 .6 .9 70 IS 1.3 0 18 *.2 .5 .9 48 17 1.2 0 . 19 .5 .5 1.0 53 16 .9 0 20 .9 *,5 .9 58 14 .9 0 21 .6 .5 .9 63 13 1.1 0 2? .7 .5 .9 80 10 .9 0 23 .7 .5 1.0 S7 7.7 1.0 0 24 .6 .5 1.1 76 7.0 8.2 0 25 .6 .5 1.1 70 6.3 1.5 .1 ?fi .6 .4 1.1 *5S 6.6 .8 .1 27 .5 .3 1.2 51 5,3 .6 .2 28 .5 .3 1.3 51 4.6 .5 .1 ?°t .6 .4 1.4 48 4.4 .5 .1 30 .6 .4 1.6 40 4.0 .7 0 31 .5 ~ " 44 . .4 0 Second- Runoff in Month fcct-days Maximum Minimum Mean acre-feet 0.9 0.2 0.47 29 14.4 .6 .3 .48 29 December ...... Calendar year ...... _ _ - _ _ " ^ ______.. .. _ 28.2 1.6 .7 .94 56 Hay 1,576.0 106 l.S 50.8 3,130 635.9 38 4.C 21.2 1,260 July 50. 9 4.2 o< 4 1.64 101 Augu 2.2 .3 ,07 4.4 September ...... 0 0 0 0 0 Water year ...... - - - - - * Iflnter discharge measurement made on this day. Note.- Stage-discharge relation affected 117 Ice Oct. 29 to Nov. 20, Apr. 25 to Hay 9. No gage- helght record Nov. 21-30, Apr. 1-24 (stage-discharge relation probably affected by lee during entire period); discharge computed on basis of weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRIBUTARIES ABOVE GUNNISCN RIVER 81

West Divide Creek below Willow Creek, near Raven, Colo. Location.- Water-stage recorder, lat. 39°17', long. 107°31', In NEi sec. 14, T. 9 S., R. 91 w., a quarter of a mile downstream from willow Creek and 15 miles south of Raven. Drainage area.- 32.7 square miles. Ftecoras available.- October 1938 to September 1944. Extremes.- riaximTmi discharge during year, 698 eecond-feet May 15 (gage height, &.<*>3.33 LW\,,,feet), rrom rating curve extended above 350 second-feet; minimum dally, 0.1 second-foot Sept. 7, 8, 10-26. 1938-44: Maximum discharge, 876 second-feet May 13, 1941 (gage height, 3.27 feet), from rating curve extended above 320 second-feet; no flow during some periods In nearly every year. Remarks.- Records good except those for period crt ice effect or no gage-height record, wnicn are poor. No diversion above station. Flow Increased above station by diversion from Clear Fork East Muddy Creek (Ounnlson River Basin) through Clear Fork ditch and by diversion from Thompson Creek (Roaring Fork Basin) through Thompson Creek feeder ditch as shown In the following table:

Diversion Ditch Month (acre-feet) 117 July 687 Thompson Creek feeder dltcl- June 193 July 152 Total...... - 1,150 Cooperation.- Records of diversions to west Divide Creek furnished by State engineer.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 3.4 7.1 2.5 25 254 112 2.8 0.2 2 3.0 5.2 3.0 30 226 98 2.S .2 3 2.7 4.8 4.4 32 211 104 2.3 .2 4 2.4 4.S 6.0 32 18S S2 1.7 .2 5 2.4 4.4 7.4 33 166 74 1.6 .2 6 2.0 4.4 8.6 56 161 64 1.6 .2 7 2.4 4.8 8.8 86 166 58 1.7 .1 8 2.0 4.1 10'" 116 164 51 1.1 .1 9 2.0 3.8 155 182 45 1.1 .2 10 2.0 3.4 9.4 172 18S 44 1.1 .1 11 3..0 3.8 10 201 175 39 .9 .1 12 4.4 3.8 12 276 152 33 .7 .1 13 4-i ' 3.8 13 360 139 29 .6 .1 14 4.8 3.8 12 440 134 2S .5 .1 15 4.1 3.4 11 505 126 24 .6 .1 2.0 1.7 2.0 ' 2.2 16 3.S 3.4 11 515 126 24 .5 .1 17 3.4 3.0 11 396 114 19 .5 .1 18 3.0 2.7 11 272 100 17 .4 .1 19 4.4 2.7 11 | 251 94 16 .6 .1 20 5.2 *2.4 (») 11 272 91 16 .7 .1 21 4.1 2.3 11 237 85 15 .6 .1 22 4.4 2.4 10 376 32 13 .5 .1 23 5.2 2.5 9.6 414 91 12 .8 .1 24 3.S 2.5 10 401 96 14 .6 .1 25 4.1 2.3 11 384 89 15 1.4 .1 26 4.1 1.9 15 344 89 11 .8 .1 27 3.S 1.8 20 314 77 3.3 .5 .2 28 4.1 2.0 22 314 75 5.0 .3 .2 29 5.9 2.0 20 314 104 4.5 .3 .2 30 6.7 2.0 - 20 313 116 4.-8 .3 .2 31 5.5 - - ' - 276 3.5 .2 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 116. 2 6.7 2.C 3.75 230 November 101.3 7.1 l.E 3.38 201 December...... 62.0 2.0 123 Calendar year 1943 "7,152.4 128 19.6 14,180

January...... 52.7 _ 1.7 105 February...... 58.0 _ _ 2.0 115 arch...... 68.2 _ _ 2.2 135 April...... 330.9 22 2.6 11.0 656 a,...... 7,967 515 25 257 15,800 June ...... 4,055 254 75 135 3,040 July...... 1,083.1 112 3.E 34.9 2,150 August ...... 30.1 2.8 .1 .97 60 Septenber...... 4.1 .2 .1 .14 3.1 Water year 1943-44 ...... 13,928.6 515 .1 38.1 27,620 » Winter discharge measurement made on this day. ttote.- No gage-helgjit record Hov. 21 to Apr. C6 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 1 discharge measurement, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 82 TRIBUTARIES ABOVE GUNNISON RIVER

Plateau Creek near Collbran, Colo. Location.- Water-stage recorder, lat. 39°15', long. 107°50', In NEi sec. 26, T. 9 S., R. ' 94 w., 7 miles east of Collbran. Drainage area.- 88 square miles. Records available.- August 1921 to September 1927 (monthly discharge), October 1933 to September 1944 In reports of Geological Survey. August 1921 to September 1944 in reports of State engineer. Average discharge.- 23 years, 102 second-feet. extremes.- naximum discharge during year, 1,330 second-feet June 9 (gage height, 4.89 feet); minimum dally, 7.8 second-feet Oct. 9. 1921-44: Maximum discharge, 2,800 second-feet tfey 28, 1922 (gage height, 6.72 feet, site and datum then In use), from rating curve extended above 1,300 second-rfeet; mini­ mum dally, 3 second-feet Sept. 21, 1926. Remarks.- Records good except those for Nov. 2 to Mar. 1, which are fair. Five small diversion* above station.

Rating tables, water year 1943-44, except period of ice effect (j height, in feet, and discharge. In second-feet) (Shifting-control method used Hov. 6, 9-23) Oct. 1 to Bay 14 May 15 to Sept. 30 2.0 6 2.5 37 35 £30 2.1 8 2.6 44 33" 33O 2.1 9.5 2.6 43 36 £60 2.2, 12 2.8 72 41 49O 2.C 14 2.7 62 37 300 2.3 18 " 3.1 126 4 3 640 2.3 2O 2.9 96 39 410 2.4 25 3.4 186 45 830 2.4 28 3.1 134 43 680 2.5 34 3.6 240 4 7 1,080

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 17 35 14 12 13 12 15'16 38 1,080 320 24 14 2 14 28 15 12 13 *12 40 950 276 27 13 3 11 33 13 12 13 12 18 32 694 345 25 13 4 10 36 14 11 13 12 23 30 518 365 22 12 5 8.4 38 15 10 13 12 2S 38 46O 260 22 11 6 8.8 29 16 11 13 12 34 83 532 £22 24 10 7 S.4 30 17 11 13 12 3S 13S 624 1S6 29 10 8 8.4 27 17 10 13 13 38 185 624 160 27 10 9 7.8 *29 16 10. 13 12 36 230 9S6 148 27 9.6 10 8.1 29 15 10 13 13 34 264 1,020 140 25 9.6 11 9.5 2S 12 11 13 14 4O 276 1,050 128 23 9.6 12 18 27 13 11 *13 14 51 335 1,000 119 21 9.6 13 14 28 17 11 13 14 56 446 93 S 103 21 9.6 14 19 25 15 11 13 13 44 624 926 31 21 9.2 15 20 25 14 11 13 14 37 760 878 79 24 9.2 16 21 25 15 12 13 16 31 914 750 77 29 9.6 17 20 25 15 12 13 14 29 790 640 65 28 9.2 18 20 21 14 12 13 15 26 472 624 61 28 9.2 19 28 20 17 13 13 14 25 400 858 62 28 9.6 20 23 20 16 *13 13 16 26 448 64O 79 29 9.2 21 25 19 14 13 13 16 24 525 60O 57 2S 16 22 *27 2O 13 13 13 16 24 721 525 47 26 20 23 25 20 13 13 13 15 23 902 , 460 44 24 19 24 23 19 13 14 13 14 24 93 S 484 55 26 13 25 24 18 12 , 13 13 14 25 890 466 65 30 10 26 27 14 12 13 12 15 24 866 584 47 24 11 27 27 12 12 13 12 15 28 730 410 35 20 11 28 33 14 12 13 12 17 34 820 320 29 17 10 29 40 14 12 13'13 12 16 29 976 315 25 16 11 30 37 14 12 - 15 28 1,030 315 27 15 11 31 33 - 12 13 - 15 - 1.O70 - 23 14 - Second- Moan Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 615.4 40 7.E! 19.9 1,220 November...... j. . . . 722 38 . 12 24.1 1,430 December ...... 437 17 12 14.1 867 Calendar year 1943 ...... 28,999.4 798 7.C 79.5 57,520 January...... 370 14 10 11.9 734 February...... 373 13 12 12 . 9 74O March 434 17 12 14 . 0 861 April ...... 90S 56 15 30.3 1,800 Hay 16,011 1,070 30 516 31,760 June ...... 20,011 1,080 315 667 39,690 July 3,730 365 120 7,400 August ...... 744 30 14 24.0 1,480 September ...... "...... 338.2 20 9.J! 11.3 671 Water year 1943-44 ...... 44,693.6 1,080 7.E 122 88,650 * Winter discharge measurement made on this day. Hote.- Stage-discharge relation affected by lee Nov. 2-5, 7, 8, Nov. 24 to Dee. 19. No gage- height record Jan. 1 to Mar. 1 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. TRJBUTARIES ABOVE GUNNISON 'RIVER 83

Plateau Creek near Cameo, Colo.

Location.- Water-stage recorder, lat. 39°11', long. 108°16', in SWi sec. 18, T. 10 S., R. 97 W., 1.1 miles upstream from mouth and 4 miles northeast of Cameo. Drainage area.- 604 square miles. Records available.- April 1936 to September 1944, Records of monthly discharge prior to October 1938 have been republished In Water-Supply Paper 918. Extremes.- Maximum discharge during year, 3,320 second-feet May 24 (gage height, 5.76 reet;; minimum dally, 50 second-feet Jan. 13, 14. 1936-44: Maximum discharge, 3,920 seoond-feet May 27, 1942 (gage height, 7.73 feet), from rating curve extended above 3,000 second-feet; minimum dally,- 16 second- feet July 14, 15, Aug. 17, 18, 1940. Remarks.- Records good Bxcept those for period of Ice effect or no gage-height record, wmcri are fair. Many diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July AugA Sept.

1 63 132 73 58 64 83 83 274 1,610 444 86 60 'A 63 107 81 60 66 86 80 280 1,710 375 86 59 61 118 70 62 64 93 85 204 1,460 422 86 63 4 61 136 73 58 64 86 100 170 1,130 470 81 61 b 60 129 80 56 68 83 132 ISO 938 398 77 61 6 59 115 85 62 72 , 73 158 268 872 319 73 59 57 86 86 62 72 1 63 160 456 1,010 290 70 59 8 60 75 86 58 81 67 163 530 1,020 253 70 61 9 63 85 85 a52 90 86 173 726 1,250 228 72 63 10 66 98 85 a54 88 83 158 872 1,690 209 72 61 11 100 98 69 656 60 95 160 854 1,760 196 72 60 12 102 95 73 a56 81 113 201 1,000 1,630 178 70 57 13 95 95 92 a50 80 139 242 1,350 1,410 165 67 57 14 100 93 78 aSO 72 139 186 1,250 1,420 144 67 57 IS 98 88 80 a64 85 104 158 1,550 1,300 129 67 59 '1716 97 86 80 a54 67 80 156 1,850 '1,240 122 64 57 92 86 75 a56 81 95 136 2,080 989 113 61 56 18 90 90 86 a5 8 70 102 132 1,780 890 109 59. 56 19 102 88 90 a60 75 85 127 1,410 848 107 61 56 20 100 86 80 662 75 90 120 1,200 818 122 66 56 21 95 86 80 62 81 85 113 1,290 788 116 66 56 22 95 100 80 60 80 77 115 1,550 688 107 61 59 23 88 107 80 *62 78 83 107 1,840 575 104 61 57 24 83 92 78 64 80 98 111 2,040 570 107 59 59 25 85 90 73 64 81 88 115 1,820 550 129 69 60 "85 26 77 80 60 80 86 124 1,800 615 122 66 64 at 86 60 67 58 73 80 144 1,500 640 115 64 64 28 86 70 58 62 80 75 253 1,400 452 107 63 63 29 122 75 60 66 75 78 268 1,660 406 102 61 64 30 124 72 62 62 - 78 217 1,750 406 95 60 66 31 141 - 60 62 - 75 1^760 92 59 Seccnd- Runoff in Month fcot-days Maximum Minimum Mean acre-feet

2,679 141 57 86.4 5,310 2,817 , 136 60 93s9 5,590 December...... 2,387 92 5E 77.0 4,730 Calendar year 1943 ...... 58,788 1,210 2Z 161 116,600 1,820 66 50 58.7 3,610 2,183 90 60 75.3 4,330 2,748 139 63 88.6 5,450 4,477 268 8C 149 8,880 May...... 36,694 E.080 170 1,184 72,780 30,885 1,810 406 1,030 61,260 5,988 470 92 193 11,880 2,116 86 59 68.3 4,200 September ...... 1,790 66 56 59.7 3,550 Water year 1943-44 ...... 96,584 2,080 50 264 191,600 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of weather records and records for stations on nearby streams. Note.- Stage-discharge relation affected by ice Dee. 28 to Jan. S, Jan. 21 to Feb. 7. Time basis; Mountain war time. To convert war time to standard time, subtract'l hour. 84 TRIBUTARIES ABOVE OUNNISON RIVER

Buzzard Creek near Collbran, Colo.

Location.- Water-stage recorder, lat. 39°16', long. 107°52', In sec. 14, T. 9 S., R. 94 w., naif a mile upstream from Brush Creek and 7 miles east of Collbran. Drainage area.- 139 square miles. Records available.- August 1921 to September 1927 (monthly discharge only), and October iyaa to tjepcemoer 1944 in reports of Geological Survey. August 1921 to September 1944 in reports of State engineer. Average discharge.- 23 years, 55.2 second-feet. Extremes.- Maximum discharge during year, 1,530 second-feet May 17 (gage height,, 7.40. reetj, from rating curve extended above 900 second-feet; minimum daidaily, 0.2 second- foot Sept. 4, 5. 1921-44: Maximum discharge, 1,630 s«cond-feet May 14, 1941 (gage height, 7.80 feet), from rating curve extended above 900 second-feet; minimum, 0.1 second-foot Aug. 27, 1934 (gage height, 0.76 foot). Remarks.- Records excellent except those for Oct. 1 to May 19, which are fair. Diver- sions above station for irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 2.9 11 b3.3 3.4 4.1 3.9 10 122 405 46 1.4 0.3 2 2.7 9.5 b4.2 3.6 4.5 *4.2 20 1O5 358 40 1.2 .3 3 2.7 S.4 b5.4 3.6 4.0 4.5 35 60 335 77 1.1 .3 4 2.6 8.4 b3.9 3.2 4.5 5.0 45 45 292 85 .8 .2 5 2.2 12 b4.7 3.1 5.0 4.S 45 70 300 55 .S .2 6 2.2 9.0 5.5 3.3 5.3 4.6 44 147 234 42 .8 .3 7 2.6 5.3 5.3 3.2 5.4 4.1 46 238 250 33 .6 .3 ft 2.4 b4.7 5.5 3.1 5.5 4.5 46 2S6 248 27 .6 .3 9 2.4 »b5.5 5.5 3.1 5.7 5.2 61 392 270 22 .6 .3 10 2.6 ti6.4 5.5 3.1 6.0 5-0 53 430 31S 19 .6 .3 11 3.2 7.1 b4.6 3.3 7.2 6.0 72 502 3OO IS .6 .3 1?. 5.0 7.1 b4.5 3.3 *7.4 7.0 90 54O 258 17 .6 .3 13 5.5 6.S .7 3.2 6.0 S.O 97 735 216 15 .5 .3 14 5.5 5.8 .8 3.2 5.0 7.2 53 S91 14 .4 .3 15 5.5 3.2 .6 3.3 5.4 6.2 46 990 202 10 .4 .4 16 5.S 3.5 .7 3.5 5.4 5.8 38 1,030 200 S.5 .4 .4 17 5.8 2.9 .4 3.5 5.2 6.6 38 978 182 S.O .4 .4 1ft 6.1 3.5 .4 3.5 5.0 7.2 31 485 132 7.0 .4 .4 19 7.4 3.7 .5 3.5 4.3 6.4 33 450 122 6.3 .4 .4 20 10 4.0 .8 *3.5 4.4 7.2 31 515 117 6.6 .5 .5 ?1 «6.7 2.4 .8 3.5 4.6 6.S 25 546 110 7.5 .5 .5 m 7.7 1.4 .9 3.7 4.5 6.4 27 666 97 6.6 .5 .6 23 7.7 1.6 .6 3.7 4.5 7.4 24 717 82 5.2 .4 .7 24 6.4 .6 .5 4.1 4.6 8.2 31 699 76 7.0 .4 .8 25 5.S .9 .3 4.0 4.8 7.S 35 564 74 S.5 .4 .S 26 5.S .8 .4 3.8 4.4 7.2 38 546 35 9.0 .4 .9 27 6.1 .8 .1 3.8 4.2 7.0 61 44O 76 5.6 .4 1.0 28 6.4 1.6 .7 4.0 4.1 6.6 82 415 61 4.6 .4 1.1 29 9.0 b2.0 .0 4.3 4.3 7.4 62 455 52 2.8 .3 1.1 30 18 b2.7 .1 4.0 _ 9.4 81 448 48 1.9 .3 1.1 31 15 - 3.6 3.9 - 9.2 - 422 - 1.7 .3 -

Seccnd- Runoff in Month fcct-days Maxima MlaiBUB Mean acre-feet 360 November...... 12 .6 4.75 283 December...... 139.6 5.5 3.5 4.50 277 Calendar year 1943 ...... 10,990.4 232 .6 30.1 21,790 217 4.0 5.01 288 arch...... 196.8 9.4 3.9 6.35 390 97 10 46.7 2,780 May...... 14,929 1,030 45 482 29,610 June 616. S 85 1.7 19.9 1,220 17.4 .56 SeptembeTr...... 15.1 1.1 .2 .60 SO Water year 1943-44 ...... 23,615.6 1,030 .2 64.5 46,840 * Winter dlschargs measurement made on this day* b Stage-discharge .relation affected by Ice. Hota.- So gags-height record Dec. 13 to Apr. 4 (stage-discharge relation probably affected by Ice during 'entire period); discharge computed en basis of 3 discharge measurements, weather records,, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time tc standard time, subtract 1 hour. TRIBUTARIES ABOVE QUNNISON RIVER 85

Big Creek near Collbran, Colo.

Location.- Water-stage recorder, lat. 39°02'. long. 107°58', in Ni sec. 14, T. 10 S., R. 95 W., 3 miles south of Collbran and 4$ miles upstream from mouth. Drainage area.- 25.3 square miles. Records available.- October 1941 to July 1944 (discontinued). Extremes.- Maximum discharge during period October to July, 590 second-feet June 10 (gage height, 4.68 feet), from rating curve extended above 150 second-feet; minimum dally, 1.1 second-feet Nov. 23, 24, 26, 27. 1941-44: Maximum discharge observed, 750 second-feet May 30, 31, June 1, 1942. (gage height, 3.00 feet, site and datum then in use), from rating curve extended above 280 second-feet; minimum dajly, that'of 1944. Remarks.- Records good except those above 300 second-feet, which are fair, and those below 15 second-feet, which are poor. Diversions above station for storage and irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 12 2.6 1.3 1.3 2.0 3.2 3.9 5.3 111 185 2 13 D2.0 1.2 1.3 2.2 «3.2 4.0 4.7 107 140 3 11 2.4 1.3 1.3 2.5 3.5 3.9 4.1 107 147 4 8.8 2.9 1.4 1.3 2.4 3.7 3.8 4.0 107 - 5 7.7 3.2 1.4 1.3 3.0 3.5 *3.9 5.3 103 - 6 S.I 2.8 1.4 1.3 3.5 3.4 4.7 11 107 _ 7 8.1 D2.7 1.5 1.3 3.7 3.4 4.8 18 109 _ 8 7.7 D2.9 1.4 1.3 3.8 3.6 4.5 28 129 n 9 6.S *3.3 1.3 1.3 4.0 3.7 4.5 43 835 _ 10 4.3 3.4 1.3 1.3 4.7 3.9 3.9 50 410 - 11 5.5 3.6 1.3 1.3 *4.9 4.0 4.5 52 412 , 12 e.e 3.6 1.3 1.3 4.4 4.2 6.3 66 415 _ 13 8.1 3.1 1.3 1.3 3.6 4.2 8.0 75 430 . 14 8.1 2.6 1.3 1.3 3.6 4.1 5.8 97 425 _ 15 e.e «.6 1.3 1.3 3.9 3.9 5.2 107 405 - 16 7.9 2.8 1.3 1.3 3.9 3.7 4.7 97 3S2 , 17 6.S 2.4 1.3 1.3 3.8 3.8 4.4 S9 365 _ 18 5.5 2.6 1.4 1.3 3.7 4.0 4.1 67 340 w 19 7.9 2.7 1.4 1.3 3.5 3.7 4.1 79 370 . 20 5.9 2.8 1.4 1.3 3.6 4.0 4.1 67 252 - 21 4.7 1.6 1.4 *1.3 3.7 3.8 4.1 . 95 228 , 22 *2.6 1.2 1.3 1.3 3.7 3.7 4.0 105 188 _ 23 3.0 1.1 1.3 1.4 3.7 4.0 4.0 118 154 _ 24 2.6 1.1 1.3 , 1.6 3.S 4.2 4.0 105 147 w 25 2.2 1.2 1.3 1.5 3.8 4.0 4.1 116 147 - 26 2.4 1.1 1.3 1.5 3.6 3.9 4.0 107 257 _ 27 1.7 1.1 1.3 1.7 3.5 3.7 4.2 103 161 _ 28 2.7 L.2 1.3 1.8 3.4 3.6 4.5 165 124 . 29 2.6 L.2 1.3 2.0 3.2 3.6 5.5 138 124 ... * 30 2.6 1.2 1.4 1.9 _ 3.9 5.0 133 143 .. 31 2.4 - 1.4 1.9 - 4.0 - 145 - - Seoond- Runoff in Mouth foot-days Maximum Minimum Mean acre-feet

October...... 189. 1 13 1.7 6.10 375 November...... 69.2 3.6 1.1 2.31 137 December...... 41.4 1.5 I &n 1.34 32

Calendar year 1943 ...... 5,640.8 n>«rO 1.1 15.5 11,160 January...... 43.9 2.0 1.3 1.42 87 Febi*uary 103.3 4.9 2.0 3.56 205 arch...... 117.1 4.2 3.2 5 . nof O 232 April ...... 136.3 8.0 3.S 4.54 270 Itey...... 2,339.4 165 4.0 75.5 4,640 June ...... 6,994 430 103 233 13,870 July...... August ...... _ _ _ _ September...... - - - - - The period. - - - - 19,900 « Winter diacharge measurement made on this day. b Stage-discharge relation affected by Ice. Hota.- No gage-height record Nor. 3,4, Nov. 9 to Apr. 3 (stage-discharge relation affected by Ice during most of period}; discharge computed on baala of 4 discharge meaauremsnta, weather recorda, and records for atatlona on nearby streams. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 86 < TRIBUTARIES ABOVE OUNNISON RIVER

Mesa Creek near Ife§a, Colo.

Location- Water-stage recorder, lat. 39°05', long. 108°07', in SWi sec. 16, T. 11 3., R. 96 W., an eighth of a mile upstream from unnamed stream and 5i miles southeast of Mesa. Records available.- April 1941 to September 1944. Extremes.- Maximum discharge during year, 71 second-feet May 23 (gage height, 1.83 feet); minimum daily, 1.6 second-feet Nov. 24. » 1941-44: Maximum discharge observed, 140 second-feet May 12, 1941 (gage height, 2.00 feet, site and datum then in use), from rating curve extended above 50 second- feet; minimum daily, 1.2 second-feet Apr. 4, 1941. Remarks.- Records good except those for periods of ice effect or no gage-height record, which are fair. Flow partly regulated by small reservoirs above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6.9 b6.4 2.5 .0 5.2 5.6 5.4 6.3 42 24 20 18 2 6.6 b4.5 2.8 .1 5.2 5.6 5.2 6.6 44 23 20 18 3 6.6 4.0 2.5 .0 5.0 5.4 5.6 6.3 42 23 20 IS 4 6.6 4.2 2.9 .9 4.9 5.4 5.6 6.6 37 24 21 IS 5 6.3 4.6 3.2 .0 4.9 5.4 *5.5 7.0 32 24 21 17 6 5.7 3.2 3.4 .2 4.9 5.2 5.2 8.6 32 24 21 16 7 6.6 2.0 3.3 .2 5.0 4.9 5.5 9.6 35 24 21 16 8 6.9 2.0 3.5 .0 5.0 5.2 5.5 12 34 24 22 16 9 6.9 *2.1 3.6 .1 5.0 5.4 5.2 14 32 24 22 16 10 6.9 2.3 3.6 .2 5.0 5.6 5.0 14 32 24 22 17 11 6.9 2.5 3.5 .3 »5.0 5.5 5.0 14 32 24 23 17 12 7.6 2.5 3.7 .2 5.0 5.4 5.5 16 25 23 23 17 13 7.6 2.5 3.8 .2 4.9 5.2 5.7 20 27 22 22 16 14 6.9 2.4 3.8 .3 4.7 5.0 6.5 22 28 23 22 16 15 8 2.0 2.7 .5 4.7 5.2 5.2 27 27 24 22 16 16 7.6 2.1 4.0 4.7 4.7 5.4 5.2 25 27 25 22 15 17 7.6 1.9 3.6 4.9 4.S 5.6 5.2 22 26 27 18 14 18 6.6 2.1 3.8 5.1 4.9 5.4 4.8 18 25 27 18 14 19 8.7 2.2 .0 5.1 5.0 5.0 5.0 18 25 27 16 14 20 *9.6 2.4 .1 »5.4 5.0 4.9 5.0 20 25 26 16 13 21 8.0 2.1 .3 5.4 4.9 4.8 5.0 21 25 26 16 11 22 8.0 2.0 .4 5.6 4.8 4.9 5.2 24 25 26 21 12 23 8.0 2.2 .3 5.6 4.9 5.0 6.0 40 26 26 25 11 24 8.0 1.6 .2 5.6 4.9 5.4 6.0 59 27 25 26 10 25 8.0 1.9 .0 5.4 5.0 5.2 6.3 51 . 26 25 25 9.9 26 7.2 1.8 4.1 5.2 5.2 5.2 6.3 45 26 24 24 9.5 27 7.2 1.8 4.0 5.2 5.2 5.0 6.S 40 27 24 23 9.1 28 7.2 2.0 4.0 5.4 5.2 4.8 6.6 41 27 24 22, 9.1 29 7.6 2.2 4.0 5.0 5-4 4.6 6.3 44 27 23 23 9.1 30 7.6 2.3 4.0 5.0 5.4 6.0 41 24 21 21 10 31 - 8.0 - 3.9 5.0 - 5.3 - 40 - 20 20 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 227.8 5.7 7.35 77.8 December ...... 114.7 4.4 2.5 3.70 228 Calendar year 1943 ...... 4,014.0 31 1.6 11.0 7,960 145.8 5.6 3.9 4.70 289 144.3 5.4 4.7 4.98 286 Maroh...... 162.1 5.6 4.8 5.23 322 April ...... 165.8 6.6 4.6 5.53 329 739.0 59 6.3 23.8 869 44 24 29.6 1,760 . 750 27 20 24.2 1,490 658 26 16 21.2 1,310 September...... :...... 421.7 18 9.1 14.1 836 Water year 1943-44 ...... 4,496.0 59 1.6 12.3 8,930 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Hote.- So gage-height record Bov. 3 to Apr. 4 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain irar time. To convert »ar time to standard time, subtract 1 hour. OUNNISON RIVER BASIN 87

Taylor park Reservoir at Taylor Park, Cftlo.

Location.- Staff gage, lat. 38°49', long. 106°36', at dam In sec. 16, T. 14 S., R. 83 w., on Taylor River, Just downstream from Taylor Park and 17 miles northeast of Almont. Datum of gage is 9,187 feet above mean sea level (Bureau of Reclamation bench mark); gage readings have been reduced to elevations above mean sea level. Records available.- October 1938 to September 1944 in reports of Geological Survey, aeptemoer isssvto September 1938 In files of Bureau of Reclamation. Extremes.- Maximum contents observed during yeer, 108,600-acre-feet June 12, 13, 22 (elevation, 9,331.15 feet); minimum, 45,320 acre-feet Sept. 30 (elevation, 9,292.10 feet). 1938-44: Maximum contents observed, 109,700 acre-feet June 19, 1942 (elevation, 9,331.60 feet); minimum, 9,980 acre-feet Sept. 20-22, 1940 (elevation, 9,243.55 feet). Remarks.- Dam completed by Bureau of Reclamation in September 1937. Capacity of reser- voir, 106,200 acre-feet between elevations 9,187 feet (bottom of outlet gates) and 9,330 feet (crest of spillway). No dead storage. VJater used for irrigation in Uncompahgre Valley. No other reservoirs of any consequence in Gunnlson River Basin. Figures given herein are of usable contents. Cooperation.- Records furnished by Uncompahgre Valley'*wat8r Users Association.

Elevation and contents, water year October 1943 to September 1944 Change in contents Date Elevation Contents during month (feet) (acre-feet) (acre -feet)

Calendar - - year 1943..... +21,400

9 *29S 10 Water year _ _ -45,310

Time basisj Mountain war time, To convert war time to standard time, subtract 1 hour. 88 OUNNISON RIVER BASIN

Taylor Rlwr below Taylor Park Reservoir, Colo.

Location- Water-stage recorder, lat. 38°49', long. 106°36', In sec. 24, T. 14 8., R. 53 W., a quarter of a mile downstream from Taylor Park Reservoir Dam and 16 miles northeast of Almont. Drainage area.- 245 square miles. Records available.- October 1938 to September 1944. September 1933 to August 1934 (in reports of Oeologlcal Survey), June 1939 to August 1934 (In reports of State engi­ neer), at site at Taylor Park (records practically equivalent If flow of Texas and Willow Creeks Is added). Extremes.- Maximum discharge during year, 950 second-feet"Sept. 11, 12 (gage height, 3.84 feet); minimum daily, 50 second-feet Dec. 1 to May 14 (regulated). 1938-44- Maximum discharge, 1,220 second-feet June 19, 1942 (gage height, 4.25 Jeef); no flow May 1 to July 3, 1940, May 7-22, 1942, May 5-21, 1943.

Remarks.- Records excellent except those for period of no gage-height record, which are fair. Flow regulated by Taylor Park Reservoir (see preceding page). One small diversion from Willow Creek above reservoir. Cooperation.- Gage-height record a»d discharge measurements furnished by Uncompahgre Valley Water Users Association. Rating table, water year 1943-44 (gaga height, In feet, and discharge. In second-feet) 1.3 47 2.3 270 1.5 78 2.6 375 l.S 138 3-0 545 2.1 212 - 3.9 980

Discharge, in second- feet, water year October 1943 to Sept caber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 459 59 50 50 50 50 50 50 785 563 305 790 2 439 59 50 50 50 50 50 50 770 545 415 790 3 439 59 50 50 50 50 50 50 720 500 482 805 4 439 59 50 50 50 50 50 50 644 478 455 860 5 435 59 50 50 50 50 50 50 568 435 451 650 6 435 59 50 50 50 50 50 50 532 395 451 835 7 435 59 50 50 50 50 50 50 608 361 258 860 8 455 59 50 50 50 50 50 50 640 347 229 880 9 435 59 50 50 50 50 50 50 671 340 207 880 10 435 59 50 50 50 50 50 50 795 330 204 920 11 435 59 50 50 50 50 50 50 860 319 202 950 12 415 55 50 50 50 50 50 50 840 298 .255 950 13 291 53 50 50 50 50 50 50 785 277 522 905 14 204 53 50 50 50 50 50 50 770 258 423 S40 15 204 53 50 50 50 50 50 60 720 240 509 S40 16 152 53 50 50 50 50 50 60 770 240 509 780 17 152 53 50 50 50 50 50 60 745 240 514 735 18 154 53 50 50 50 50 50 60 705 237 563 705 19 152 53 50 50 50 50 50 60 725 254 572 690 20 152 53 50 50 50 50 50 60 eoo 243 572 556 21 150 53 50 50 50 50 50 60 835 246 572 626 22 150 53 50 50 50 50 50 60 S45 246 572 622 23 150 53 50 50 50 50 50 60 785 240 572 604 24 150 53 50 50 50 50 50 60 770 223 572 590 26 150 55 50 50 50 50 50 60 785 220 572 540 26 150 53 50 50 50 50 50 60 765 196 572 500 27 150 53 50 50 50 50 50 60 730 176 572 415 28 113 53 50 50 50 50 50 100 653 164 604 354 29 60 -53 50 50 50 50 50 261 608 196 676 354 30 60 53 50 50 _ 50 50 482 594 218 705 354 31 60 - 50 50 - 50 - 671 - 181 735 - Seoond- Mean Runo*£ *? Month foot-days Maximum Minimum °*u acre-feet October...... 3,020 439 60 259 15,910 November...... 1,656 59 53 55.3 3,290 December. ... .~, ...... 1,550 50 50 50.0 5,070 Calendar year 1943 ...... 68,078 895 0 187 135,000 January...... 1,550 50 50 50.0 3,070 February...... 1,450 50 50 50.0 2,880 March...... 1,550 50 50 50.0 5,070 April...... :...... 1,500 50 50 50.0 2,980 ay...... 2,994 671 50 96.6 . 5,940 June ...... 21.B23 660 532 727 ' 43,290 July...... 9,186 563 164 296 18,220 August ...... 14,622 735 202 472 29,000 September...... 21,482 950 354 716 42,610 Water year 1943-44 ...... 87,385 950 50 239 173,300 Note.- No gage-height record Nov. 1 to May 26; discharge computed on basis of valve openings at Taylor Park Reservoir. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. OUNNISON RIVER BASIN 89

Taylor River at Almont, Colo. " Location.- Water-stage recorder, lat. 38°40', long. 106°51', In sec. 22, T. 51 N., R. IE., in Almont, 800 feet upstream from confluence with East River. Datum of gage Is 8,010.76 feet above mean sea level, datum of 1929. Drainage area.- 440 square miles. Records available.- July 1910 to September 1931 and October 1933 to September 1944 In reports of Geological Survey. July 1910 to September 1944 In reports of State engineer. Average discharge.- 34 years, 354 second-feet. Extremes.- Maximum discharge during year, 1,390 second-feet June 11 (gage height, 3.59 feet); minimum dally, 92 second-feet Nov. 28. 1910-44: Maximum discharge, 3,760 second-feet June 9j 1920 (gage height, 5.0 feet), from rating curve extended above 2,300 second-feet; minimum before storage began In Taylor Park Reservoir, 50 second-feet several days In August 1913 (gage height, 1.2 feet); minimum dally, 24 second-feet Mar. 12, 1938. Remarks.- Records excellent except those for periods of ice effect or no gage-height record, which are fair. Flow partly regulated by Taylor Park Reservoir (see p. 87 ), 24 miles above station. Diversions from tributaries above station for irrigation.

Rating table, water year 1943-44, except periods of Ice effect (gage height, In feet, and discharge. In second-feet) 1.9 220 2.9 600 1.6 130 2.1 305 3.2 1,040 1.7 155 2.5 535 3.6 1,400

Discharge, in second-feet, water year October 1943 to Septeaber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 511 148 96 100 110 100 100 121 1,190 S16 349 S32 2 511 142 96 100 105 105 100 128 1,130 786 499 840 3 511 148 100 105 100 105 100 117 1,040 779 565 S48 4 511 «148 104 110 100 105 105 119 936 751 541 904 5 505 150 104 105 110 100 110 132 832 723 535 912 6 505 148 112 110 98 100 115 161 800 688 523 896 7 505 120 110 110 «98 100 117 206 944 647 457 912 8 505 110 110 110 98 100 117 248 976 583 327 944 9 505 130 106 110 100 100 121 264 1,060 553 296 928 10 505 130 104 110 100 *103 112 248 1,300 529 292 952 11 505 130 100 110 100 110 117 256 1,360 505 382 1,000 12 457 130 9S 110 100 110 121 338 1,300 475 332 992 13 338 -121 100 110 100 110 121 382 1,220 433 371 968 14 282 121 105 110 100 110 110 398 1,180 415 505 888 15 264 119 105 *120 100 110 110 415 1,150 393 577 S88 16 22S 119 105 125 100 110 110 463 1,200 393 589 S40 17 228 121 100 120 100 110 108 404 1,160 3S2 589 793 18 240 121 105 115 100 110 108 305 1,080 398 634 772 19 240 121 110 115 100 105 110 292 1,110 371 660 744 20 236 123 110 115 100 105 117 296 1,190 382 660 723 21 232 110 110 115 100 105 115 310 1,240 404 654 688 22 236 110 110 115 100 100 115 344 1,230 38S 654 688 23 244 110 105 120 98 96 117 427 1,140 349 647 667 24 236 110 105 115 98 96 119 457 1,110 344 654 640 25 236 108 100 110 98 94 110 439 1,110 344 660 621 26 236 104 105 105 96 94 110 404 1,090 316 654 602 27 232 9S 105 105 96 94 119 366 1,030 282 647 523 28 228 92 98 105 96 94 126 371 928 260 660 439 29 158 94 96 105 96 «94 121 577 872 248 751 439 30 15S 94 100 105 - 96 117 864 S48 327 772 439 31 152 - 105 105 - 98 - 1,130 - 278 SOO Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 10,440 511 152 337 20,710 November...... 3,630 150 92 121 7;200 December...... 3 219 112 96 104 6,380 Calendar year 1943 ...... 118,224 1,370 66 324 234,500 January...... 3,425 125 100 110 6,790 February...... 2,897 110 96 99.9 5,750 March ...... 3,169 110 94 102 6,290 April ...... 3,393 126 100 113 6,740 May...... 10,982 1,130 117 354 21,780 June ...... 32,756 1,360 SOO 1,092 64,970 July...... 14,542 816 248 469 QQ 840 August"...... 17,136 800 282 553 33^990 Septeaber...... 23,322 1,000 439 777 46,260 Water year 1943-44 ...... 128,916 1,360 92 352 255,700 » Winter discharge measurement made on this day. Mote.- Stage-discharge relation affected by Ice Sov. 7-12, HOT. 28 to Dee. 3, Dec. 10-27, Feb. 5-i3, Mar. 10 to Apr. 4. Bo gage-height record Dec. 28 to Feb. 4, Feb. 14 to Mar. 9 (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of 1 discharge measurement and weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 7 90 GUNNISON RIVER BASIN

Gunn'lson River at lola, Colo.

Location.- Water-stage recorder, lat. 38°29', long. 107°06', In IJWi sec. 28, T. 49 N., R. 2 W., 1,000 feet upstream from highway bridge and 3,000 feet northeast of lola. Datum of gage Is 7,434.63 feet above mean sea level, datum of 1989. Drainage area.- 2,490 square miles. Records available.- October 1899 to November 1903, April 1938 to-September 1944. Average discharge.- 10 years, 849 second-feet. Extremes.- Maximum discharge during year, 4,830 second-feet June 1 (gage height, 3.74 feet): minimum daily, 230 second-feet Jan. 9, 13. 1899-1903, 1938-44: Maximum discharge observed. 6,130 second-feet June 18, 1903 (gage height, 6.0 feet, site and datum then in use); minimum daily prior to construc­ tion of Taylor Park Reservoir, 221 second-feet at times July to October 1902- minimum dally, 130 second-feet Feb. 19, 1939. Remarks.- Records excellent except those for Oct. 1 to May 9, which are ralr. Flow irri atiegUlated by Taylor Park Reservoir ( see P- 87). Diversions above station for

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 578 449 320 270 270 270 270 641 4,690 430 330 260 270 270 270 696 4,430 609 »430 310 270 270 270 270 641 4,240 2,970 620 449 300 270 270 265 2SO 536 3,840 2.S60 609 506 310 250 280 260 320 536 3,400 2,730 926 1,010 6 609 496 310 260 270 255 360 71S 3,090 2,540 940 430 320 270 270 250 3 SO 1,190 3,270 2,260 996 S 609 422 320 250 »271 245 400 1,520 3,440 9 620 430 320 230 280 245 430 1,840 3,550 1,900 805 620 440 310 240 275 250 420 1,890 4,100 1,850 S18 844 11 630 430 290 260 265 »254 430 1,900 4,370 1,770 740 898 420 280 »233 270 260 470 2,260 4,370 1,570 912 410 290 230 280 270 580 2,770 4,120 1,390 14 496 400 300 250 270 270 560 3,260 3,970 1,280 779 870 506 390 290 270 270 265 »536 3,570 3,820 1,220 844 S57 16 496 390 280 290 260 265 506 4,120 3,950 1,250 478 400 270 300 265 270 468 4,220 3,740 1,170 18 478 400 280 280 265 270 46S 3,380 3,550 19 506 390 290 280 260 270 45S 2,790 3,630 1,040 912 506 390 300 280 265 265 487 2,660 3,930 1,330 926 729 21 487 380 290 280 270 265 449 8,700 4,050 1,250 S98 685 4S7 390 290 280 270 270 430 £,880 4,030 1,120 674 496 390 290 290 270 270 430 3,260 24 496 380 280 280 270 270 440 3,670 3,670 1,030 496 360 280 270 270 265 468 3,650 3,800 1,030 912 609 26 496 320 280 260 260 260 449 3,500 3,780 27 506 300 260 260 260 260 516 3,180 3,590 28 506 310 250 260 265 260 718 3,060 3,150 805 29 496 310 250 260 270 270 968 3,630 2,990 740 912 468 506 310 270 260 _ 275 696 4,100 8,970 496 - 280 270 - 280 - 4,650 729 982 Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

December ...... 9,040 330 250 292 17,930 Calendar year 1943 ...... 364,335 3,390 163 998 722,600

°69

May...... 729 September ...... 23,854 1,010 458 795 47,310 Water year 1943-44 ...... 367,790 4,690 230 1,005 J29,500 » Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov. 9 to Apr. 14 (no gage-height record Jan. 7 to MarT29); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 91 Gunnison River below Gunnlson tunnel, Colo.

Location.- Water-stage recorder, lat. 38°32', long. 107°39', in NWi sec. 10, T. 49 N. RT7W., a quarter of a mile downstream from Gunnison tunnel and 12 miles northeast of Montrose. Datum of gage is 6,527.06 feet above mean sea level, datum of 1929. Drainage area.- 3,980 square miles. Records available.- January 1943 to September 1944. April 1905 to September 1911 at site aoove tast mortal. Records since Jan. 20, 1943, equivalent to earlier records if flow through Gunnison tunnel is added to flow past station. Extremes.- Maximum discharge during year, 11,300 second-feet May 17 (gage height, 10.85 reet ) ; minimum daily, 5 second-feet Sept. 22-28, 30. 1905-11, 1943-44: Maximum discharge recorded, 15,000 second-feet (discharge measure­ ment) June 14, 1906; minimum dally discharge prior to construction of Gunnison tunnel not determined. Remarks.- Records excellent except those for Dec. 1 to Mar. 21, Sept. 20-27, which are rair. Record of diversion through Gunnison tunnel is published below: Runoff in Runoff in Month acre-feet Month acre-feet October 35,330 June 34,870 November 9,770 July 51,780 March 11,420 August 61,420 April 30,560 September 55 ,'230 May 23,480 Cooperation.- Record of diversion through Gunnison tunnel furnished by Uncompahgre valley water Users Association. Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 115 330 470 340 390 470 264 1,110 9,180 4,950 320 253 2 261 242 500 350 390 480 183 1,220 8,440 4,890 376 264 3 121 195 470 360 390 490 208 1,120 7,870 4,760 456 232 4 121 294 450 360 400 500 253 915 6,760 4,660 456 23E 5 118 399 470 360 400 480 832 398 5,520 4,450 424 253 6 106 453 470 360 400 460 1,060 1,380 5,040 4,170 416 246 7 96 342 4SO 360 *«09 350 1,040 2,490 5,770 3,830 488 22E 8 96 290 500 350 420 270 988 3,260 6,050 3,370 40S 236 9 85 342 450 340 430 290 1,020 3,880 6,650 3,080 336 176 10 82 448 420 350 430 310 800 4,260 8,220 2,900 380 94 11 136 476 440 360 410 320 715 4,310 8,890 2,710 328 9S 12 242 494 430 340 4OO 320 1,020 5,070 8,570 2,290 228 10S 13 270 480 450 340 410 340 964 6,350 7,660 1,940 194 128 14 246 458 480 360 400 360 645 8,140 7,510 1,680 176 100 15 226 580 460 380 410 540 424 9,190 7,210 1,390 253 72 16 242 685 440 390 430 530 368 10,700 7,240 1,420 280 75 17 226 670 440 380 420 300 514 10,300 6,350 1,350 268 46 18 198 700 420 380 440 270 650 7,630 5,980 1,220 264 50 19 226 700 440 360 430 250 578 5,650 6,230 1,110 316 25 20 294 690 470 380 450 250 478 5,230 6,940 1,370 360 a6 21 294 675 450 380 »491 240 447 5,550 7,720 1,280 316 R6 22 270 695 400 390 470 236 376 5,960 7,670 1,110 304 a5 23 270 710 410 400 450 228 352 7,050 6,940 937 264 a5 24 266 705 410 390 460 276 420 8,200 7,070 1,020 246 a5 25 254 695 380 380 470 250 514 7,740 7,320 1,140 288 a5 26 298 645 380 380 470 236 470 7,130 7,550 1,050 304 a5 27 330 507 380 370 470 211 591 6,300 6,810 8S8 250 a5 28 *334 458 370 370 460 180 1,100 5,650 5,870 805 200 5 29 366 494 360 370 450 197 1,290 6,890 5,410 404 197 13 30 399 448 350 380 _ 214 1,050 8,380 5,100 438 253. 5 31 394 - 420 390 - 404 - 9,190 420 256

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 6,982 399 Si 225 13,850 November...... 15,300 710 196 510 30,350 December ...... 13,460 500 350 434 26,700 Calendar year ...... - - - - - January...... 11,400 400 340 36S 22,610 February...... 12,450 491 390 429 24,690 March...... 10,252 540 ISO 331 20,330 April ...... 19,614 1,290 183 654 38,900 May...... 171,143 10,700 898 5,521 339,500 June ...... 209,540 9,180 5,040 6,985 415,600 July...... 67,032 4,950 404 2,162 133,000 August ...... 9,605 488 176 310 19,050 September ...... 2,975 264 5 99.2 5,900 Water year 1943-44 ...... 549,753 10,700 5 1,502 1,090,000 » Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of gage leakage. Hote.- Stage-discharge relation affected by Ice Dec. 1 to Jan. 4, Feb. 21 to Mar. 21. Ho gage- height record Jan. 5 to Feb. 20 (stage-discharge relation probably affected by Ice during all of period); discharge computed on basis of 1 discharge measurement and weather records. Time basis; Mountain war time. >To convert war time to standard time, subtract 1 hour. 92 GUNNISON RIVER BASIN

Qunnison River near Grand Junction, Colo.

Location.- Water-stage recorder, lat. 39°02', long. 108°34', In NWi sec. 35, T. IS., R. i w. ute meridian, half a mile downstream from point of diversion of Redlands power canal and 2 miles upstream from mouth and Grand Junction. Datum of gage Is 4,555.14 feet above mean sea level, datum of 1929. Drainage area.- 8,020 square miles. Records available.- October 1894 to December 1895 (gage heights only), October 1896 to septenoer 1899 /at site near mouth), October 1901 to September 1906 (at site at Whltewater), October 1916 to September 1944 (at present site). Records of monthly discharge prior to October 1938 have been republlshed, with some revisions and additions, In Water-Supply Paper 918. Average discharge (river and power canal).- 36 years (1896-99, 1901-6, 1916-44), 2,801 secona-reet. Extremes (combined flow of river and powerP canal).- Maximum discharge, 27,200 second-feet nay iv; minimum aaiiy, txseooo secona-bsecona-reet sept. 12. 1917-30, 1933-44: Maximum discharge observed, 35,^00 second-feet May 23, 1920 (gage height, 14.95 feet), from rating curve extended above 21,400 second-feet; minimum dally, 106 second-feet July 20, 1934. Remarks.- Records excellent except those for Dec. 1 to Mar. 31, which are good. Diversions above station for Irrigation. Combined flow of river and Redlands power canal minus about 40 second-feet diverted during Irrigation season represents entire flow that enters Colorado River from Gunrilson River Basin. Figures of discharge Include flow of power canal. Records of water analyses for the water year 1944 are given In Water Supply Paper 1022.

Discharge, in second-feet, wster year October 1943 tc Septenber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. I 1,130 1,390 936 780 830 820 802 3,920 16,400 7,780 1,240 724 Z 99S 1,340 944 760 850 820 884 3,8SO 15,300 7,490 904 730 3 962 1,330 1,000 806 800 844 886 3,100 15,200 7,310 927 732 4 962 1,250 1,150 790 850 892 910 2,700 15,200 7,360 956 725 8 950 1,260 1,080 760 860 916 1,080 2,360 12,200 7,080 980 6S8 6 925 1,350 1,030 800 870 882 1,480 2,820 10,100 6,710 950 678 7 925 1,400 1,150 830 850 824 1,800 4,880 9,960 6,030 938 686 8 919 1,290 1,170 780 seo 773 2,000 7,060 12,200 5,290 950 676 9 937 1,160 1,170 760 916 673 1,900 8,480 12,200 4,640 974 676 10 949 1,190 1,160 850 892 758 2,050 9,970 13,700 4,450 887 707 11 955 1,330 1,060 910 844 825 1,730 10,300 15,400 4,260 897 670 12 1,030 1,370 958 890 796 887 1,660 11,800 15,200 3,900 S66 636 13 1,200 1,5*0 892 830 748 949 2,190 14,200 13,500 3,220 798 660 14 1,260 1,310 932 900 796 967 2,400 18,300 12,200 2,860 717 718 15 1,200 1,300 1,030 960 »740 1,080 1,900 22,400 11,700 2,680 689 750 16 1,120 1,290 1,010 980 820 1,100 1,540 24,800 11,300 2,460 702 768 17 1,120 1,320 932 860 781 942 1,680 25,600 10,900 2,370 772 756 18 1,070 1,250 850 910 832 883 1,760 19,900 9,300 2,280 727 792 19 1,090 1,260 860 900 818 848 1,580 13,600 9,140 2,100 744 801 20 1,190 1,250 934 920 788 948 1,530 11,800 9,740 1,930 818 798 21 1,260 1,220 1,100 S70 780 984 1,550 12,200 10,700 2,640 858 818 22 1,250 1,220 1.160 840 815 936 1,560 13,100 11,200 2,490 830 804 23 1,210 1,250 1,080 890 917 886 1,420 15,000 10,500 2,300 783 777 24 1,230 1,270 1,050 830 soe 81S 1,330 17,400 9,690 2,170 745 783 25 1,220 1,270 1,050 780 840 830 1,430 17,200 10,100 2,710 738 762 26 1,180 1,230 982 730 887 906 1,570 15,800 10,500 2,710 804 780 27 1,180 1,190 910 780 887 886 1,470 13,700 10,400 2,380 818 846 28 1,190 1,060 850 820 848 810 2,040 12,200 9,430 2,070 786 S74 29 1,240 936 786 810 840 766 3,690 12,500 8,330 1,610 745 895 30 1,350 962 »794 786 _ 736 3,590 14,600 S.OOO 1,510 683 882 31 1,430 - 760 800 - 727 - 16,300 - 1,360 680 -

Seccnd- Runoff in Month f cot-days MaxiBun Minimum Mean acre-feet

December ...... 30,770 1,170 76C 993 61,030 Calendar year 1943 ...... 899,693 12,900 704 2,465 1,784,000 980 73 C March ...... 67 "* April...... Bay...... g 36C July...... 51 380 Septenber ...... 22,592 895 636 753 44,810 Rater year 1943-44 ...... 1,127,615 25,600 63 e 3,081 2,237,000 » Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Dec. 31, Jan. 1, 2, 4-6, 8-31, Feb. 1-8. Time basis; Mountain war tine. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 92

East River near Crested Butte, Colo.

Location.- Water-stage recorder, lat. 38°52', long. 106°54', in HEi sec. 5, T. 14 3., R. 85 W. V at highway bridge, 1.2 miles downstream from Brush Creek and 4i miles east of Crested Butte. Drainage area.- 89.2 square miles. Records available.- April 1941 to September 1944 (no winter records in 1942). Extremes.- Maximum discharge during year, 1,060 second-feet June 27 (gage height, 2.72 feet), from rating curve extended above 700 second-feet; minimum daily, 13 second- feet «ar. 5-7, Mar. 17 to Apr. 2. 1941-44: Maximum and minimum discharges, those of 1944. Remarks.- Records excellent except those for period Nov. 8 to Apr. 26, Aug. 1-31, which are fair. Several small diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 50 43 26 fel ie 15 13 46 692 596 106 48 2 4S 39 26 ei 18 15 13 49 644 584 106 46 3 47 47 28 21 18 15 14 47 578 584 ioe 45 4 4£ *54 30 20 18 14 15 45 47S 505 96 44 5 44 49 32 20 *1S 13 16 53 425 510 92 44 6 44 43 30 19 18 13 17 7S 456 4S8 93 44 7 44 36 28 19 19 13 19 106 549 440 90 44 8 43 3S 28 19 19 14 22 123 554 420 85 44 9 42 40 26 18 18 »14 25 156 632 415 88 43 10 4£ 40 26 18 18 15 27 171 716 400 S8 41 11 44 40 26 18 18 15 28 200 698 365 78 40 12 50 3B 26 18 17 15 *b30 296 668 32S 71 39 13 45 38 26 *18 17 15 b29 385 656 305 67 39 14 46 36 26 18 17 15 b28 445 650 269 67 40 15 45 36 26 19 17 14 b2S 572 656 260 63 44 16 44 34 26 19 17 14 bS8 632 680 244 62 42 17 44 34 26 19 17 13 b27 538 590 228 58 40 18 42 36 26 19 17 13 b27 355 620 210 59 39 19 47 34 26 19 17 13 b27 296 692 200 58 37 20 46 34 26 IS 17 13 b27 328 803 210 55 36 21 44 34 26 18 17 13 b26 385 803 193 55 36 22 46 34 26 IS 17 13 b26 450 796 183 54 37 23 47 36 25 18 > 16 13 b26 566 680 165 54 36 24 42 34 25 IS 16 13 b27 650 722 165 57 35 25 44 30 24 18 16 13 b27 608 747 156 63 36 26 46 2S 24 18 16 13 b3S 560 710 140 5S 46 27 44 26 24 18 16 13 41 522 644 133 55 42 28 48 26 22 19 16 13 46 590 584 126 54 3S 29 53 26 21 19 16 13 47 704 602 121 53 37 30 5S 26 21 19 13 44 740 614 128 52 37 31 48 ~ 21 19 - 13 - 747 - 116 50 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 1,417 * 53 4 2 45.7 2,810 November...... 1,OS6 54 2(5 36.2 2,150 December ...... 799 32 2:I 25. S 1,580 Calendar year 1943 ...... 56,552 845 155 112,200 January...... 583 21 1 t 18. 8 1,160 February...... 49£ 19 1() 17.2 990 arch...... 424 15 i;5 13.7 841 April...... 802 47 1C 26.7 1,590 May...... 11,443 747 4!> 369 22,700 June ...... 19,339 803 42E 645 38,360 July...... 9 , 187 596 lie 296 August ...... 2,189 106 5C) 70.6 4)340 September ...... 1,219 48 3£ 40.6 2,420 Hater year 1943-44 ...... 48,987 803 i: 134 97,160 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Hote.- No gage-height record Nov. 8 to Apr. 11 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 3 discharge measurements and weather records. Time baais^ Mountain war time. To convert war time to standard time, subtract 1 hour. 94 GUNNISON RIVER BASIN

East River at Almont, Colo. Location.- Water-stage recorder, lat. 38°40', long. 106°51', In sec. 22, T. 51 N., R. 1 tl., at Almont, 400 feet upstream from mouth. Datum of gage Is 8,008.29 feet above mean sea level, datum of 1929. Drainage area.- 295 square miles. Kecpras available.- April to October 1905, July 1910 to April 1922, October 1934 to September 1944. Average discharge.- 17 years (1910-13, 1916-20, 1934-44), 356 second-feet. extremes.- Maximum discharge during year, 2,060 second-feet May 31 (gage height, 4.22 teet;; minimum dally, 44 seqond-feet Mar. 28. 1905, 1910-22, 1934-44: Maximum discharge observed, 6,500 second-feet June 15, 1921 (gage height, 6.6 feet, site and datum then In use), from rating curve extended above 3,000 second-feet; minimum, 19 second-feet Aug. 13, 1913. Remarks.- Records excellent except those for periods of Ice effect or no gage-height record, and those for Feb. 26 to May 11, which are fair. Diversions above station for Irrigation.

Rating tables, water year 1943-44, except periods of ice effect (gage height, in feet, and discharge, in second-feet) (Shifting-control method used Feb. 26 to May 11) Oct. 1 to May 11 May 12 to Sept. 30 1.5 166 0.9 7S 2.6 640 1.7 218 1.1 108 3.2 1,050 1.0 70 2.0 325 1.4 165 3.6 1,350 1.2 104 2.6 620 1.7 245 4.3 2,160 2.0 355

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 93 106 76 60 62 57 52 140 1,750 1,240 233 135 2 95 106 74 60 64 59 50 155 1,600 1,200 227 129 3 93 112 73 60 64 59 52 132 1,450 1,200 221 125 4 95 »112 86 58 64 56 55 124 1,180 1,110 210 123 5 95 132 86 56 64 55 62 142 1,010 1,060 205 123 6 95 124 83 54 66 50 75 E01 966 966 242 123 7 95 104 80 56 »68 52 76 317 1,150 889 284 120 8 97 102 78 52 68 52 93 425 1,130 798 262 111 9 95 118 75 52 68 60 114 545 1,220 805 273 95 10 95 112 74 52 66 *57 106 565 1,570 784 259 89 11 95 116 72 52 66 59 118 668 1,650 742 233 86 12 100 110 72 54 64 59 146 931 1,590 646 212 82 13 100 108 74 54 64 59 144 1,110 1,480 600 198 79 14 99 108 74 56 64 57 122 1,280 1,450 565 190 81 15 99 99 72 »58 64 55 110 1,430 1,390 535 182 82 16 99 97 72 60 64 51 108 iTeso 1,500 515 178 84 17 97 97 72 60 62 57 100 1,560 1,300 486 180 84 18 95 104 74 58 62 60 97 1,070 1,280 450 185 84 19 102 97 74 58 64 50 99 903 1,390 432 178 82 20 114 95 74 60 64 59 95 938 1,600 445 172 82 21 102 90 75 60 64 56 86 1,040 1,660 422 170 82 22 114 91 75 62 64 51 83 1,130 1,590 396 168 82 23 112 99 72 62 62 52 84 1,390 1,420 373 159 82 24 102 97 67 62 62 54 90 1,620 1,490 378 159 82 25 106 83 67 60 62 49 93 1,560 1,600 373 168 81 26 106 78 68 60 63 50 91 1,380 1,540 339 161 86 27 104 75 62 60 63 50 116 1,200 1,400 304 159 84 28 110 70 60 62 ,62 44 151 1,280 1,200 280 151 88 29 120 72 58 62 59 49 153 1,730 1,200 270 149 86 30 122 70 60 62 51 132 1,870 1,220 266 147 85 31 114 - 60 62 - 49 - 1,900 - 252 141 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 3,160 122 93 102 6,270 November ...... 2,984 132 70 99.5 5 920 December ...... , 63y 86 56 4)440 n nan pc-i onn Calendar year 1943 ...... ^...... 1 2fi » Q40 » u o . o*to ^-*-' *-*"" January...... 1,804 62 5£ 58 3,580 February...... 1, 853 68 59 *Q 3,680 March...... 1,678 60 44 54 1 3,330 April...... 153 50 98.4 5, 860 May...... 30^416 1,900 12^ 981 60,330 June ...... 41,976 1,750 96£ 'ei7TOO 83 , 260 July 19,121 1,240 25* August ...... 6,056 284 141 195 12J010 September ...... 2,837 135 79 94.6 5,630 Water year 1943-44 ...... 117,077 1,900 44 320 232,200 » Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov. 28 to Dec. 2, Dec. 10-20, Dec. 26-31, Feb. 7-25.No gage-height record Jan. 1 to Feb. 6 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 1 discharge measurement and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 95

Slate River near Crested Butte, Colo.

Location.- Water-stage recorder, lat. 38°52', long. 106°58', In sec. 2, T. 14 S., R. 86 W., naif a mile downstream from Coal Creek and 1 mile east of Crested Butte. Datum of gage Is 8,826.88 feet above mean sea level, datum of 1929. Drainage area.- 69.0 square miles. Records available.- April 1941 to September 1944. Extremes.- Maximum discharge during year, 1,000 aecond-feet May 31 (gage height, 3.89 reet); minimum daily, 8.4 second-feet Feb. 3-12. 1941-44: Maximum discharge observed, 1,240 second-feet May 13, 1941 (gage height, 3.98 feet); minimum dally, 3.9 second-feet Nov. 26, 1942. Remarks.- Records good except those for periods of ice effect or no gage-udght record, wnicn are fair. Diversions above station for irrigation.

Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 21 32 16 12 9.2 9 2 14 64 883 648 105 23 2 20 32 17 ie 9.2 9.4 14 70 865 588 94 20 IS 34 16 12 S.4 9.4 15 54 838 570 88 19 le *30 16 12 8.4 9.2 16 51 522 510 86 IS 5 18 30 16 11 8.4 9.0 IS 76 406 450 80 15 17 27 16 12 8.4 8.8 20 134 406 see eo 15 17 b24 17 12 S.4 8.6 22 175 52S 354 78 15 16 b22 17 10 S.4 8.8 25 372 546 308 74 16 16 b21 17 9.4 S.4 *9.5 27 243 630 316 74 16 10 15 b24 17 10 S.4 9.6 2S 267 847 318 69 16 8.4- 16 25 15 11 10 33 330 920 290 62 15 22 25 14 11 S.4 10 *50 42S 865 244 54 16 19 25 14 *10 8.6 10 56 550 772 215 48 16 IS 25 15 9.6 8.6 10 57 685 756 199 45 14 15 IS 26 14 9.4 8.6 10 54 792 740 17S 41 16 IS 26 14 9.4 8.6 10 52 960 812 156 41 17 18 27 14 9.4 8.8 10 54 784 668 149 38 17 18 26 14 9.4 9.0 11 50 460 660 134 33 16 23 25 14 9.4 9.0 11 45 400 740 134 32 16 20 23 25 15 9.4 9.0 11 34 416 812 134 32 15 24 26 14 9.6 9.0 11 34 475 856 125 31 15 22 24 26 14 9.8 9.0 11 30 632 820 116 30 15 n>* 22 25 14 10 9.0 11 24 a740 732 113 29 14 21 24 14 10 9.0 11 32 a 860 764 116 28 11 25 22 23 12 10 9.0 11 33 a760 820 116 31 11 oc 25 b20 12 9.2 9.0 11 35 a 600 748 100 29 17 25 b!7 12 9.0 9.0 11 46 a500 668 100 23 17 29 b!5 12 9.0 9.0 11 48 a640 558 105 22 18 34 15 12 9.0 9.0 11 68 960 582 109 24 IV 34 15 13 9.2 12 58 970 594 111 26 16 " " "" 31 33 12 9.2 - 13 960 111 24 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet 662 34 15 21.4 1,310 737 34 15 24.6 1,460 December ...... 449 17 12 14.5 691 Calendar year 1943 ...... 52,504.7 1,090 8.0 144 104,100

May 497 21,358 406 712 7,505 242 1,551 September...... 4S2 23 11 16.1 956 Water year 1943-44 ...... 50,130.5 970 S.4 137 99,440 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of records for stations on nearby streams. b Stage-discharge relation affected by ice. Hote.- Ho gage-height record Hov. 29 to Apr. 11 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 3 discharge measurements and weather records. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. 96 GUNNISON RIVER BASIN

Coal Creek near Crested Butte, Colo.

Location.- Water-stage recorder, lat. 38°51'20", long. 107°03'15", in sec. 1. T. 14 S., R. ay w., 0.2 mile dovmstream from Elk Creek and 4 miles west of Crested Butte. Datum of gage is 9,495.80 feet above mean sea level, datum of 1929. Drainage area.- 8.5 square miles. Records available.- October 1941 to September 1944 (no winter records in 1942). Extremes.- Maximum discharge during year, 187 second-feet June 30 (gage height, 2.82 feet), trom rating curve extended above 80 second-feet; minimum daily recorded, 1.9 second- feet Oct. 10, Sept. 24, probably less during period of no gage-height record. 1941-44: Maximum discharge, 207 second-feet May 26, 1942 (gage height, 2.93 feet), from rating curve extended above 90 second-feet; minimum, 0.9 second-foot Jan. 6, 1943 (discharge measurement), probably less during period of ice effect. Remarks.- Records good except those for period of no gage-height record, which are poor. Some flow released from storage in Lake Brennan (Anthracite Creek Basin) for municipal purposes of town of Crested Butte. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.8 3.6 126 81 4.1 2.3 2 2.2 4.3 115 72 3.9 2.3 3 2.2 3.9 90 68 3.6 2.3 4 2.2 (») 3.8 69 5S 3.5 8.3 5 2.2 4.5 63 53 3.5 2.3 6 2.2 6.3 74 43 3.5 2.2 1 2.1 S.8 SS 38 3.2 2.2 8 2.0 13 94 34 3.1 2.2 9 2.0 81 121 31 3.2 2.2 10 1.9 27 141 31 3.1 2.1 11 2.4 88 139 27 2.6 2,1 12 2.7 30 129 23 2.7 2.1 13 Z.I a4 39 122 18 2.7 2.1 14 2.7 51 US 17 2.6 2.1 15 2.9 62 126 16 2.6 2.6 a3 > s3.5 a4 a4 s4 16 3.0 72 124 16 2.6 2.2 17 3.0 58 122 14 2.5 2.2 18 2.S 35 120 13 2.5 2.2 19 2.7 32 131 13 2.5 2.1 20 2.7 34 145 12 2.5 2.0 21 2.7 39 143 9.9 2.4 2.0 22 2.7 56 129 9.3 2.4 2.1 23 2.7 ee 124 9.0 2.3 2.0 24 3.0 102 124 9.6 2.5 1.9 25 3.0 SS 121 11 2.7 2.1 26 3.1 4.0 80 116 7.7 2.4 2.2 27 3.1 3.9 80 97 6.3 2.4 2.1 28 3.J5 \ 3.7 103 67 5.8 2.4 2.1 29 3.5 3.6 131 64 5.4 2.4 2.0 30 3.1 _ 3.6 128 82 4.9 2.4 2.0 31 b3.5 - - 151 ~ 4.4 2.4 - Seoond- Runoff in Month fcot-days Maximum Minimum Mean acre feet October ...... 62.6 3.6 1.9 2.67 164 Novenber 90 _ _ 3 179 December...... 108.5 - - 3.5 215 Calendar year 1943 ...... 6,172.7 144 - 16.9 12,240 January...... 124 _ _ 4 246 February...... 116 _ 4 250 March...... 124 _ _ 4 246 April...... 11S.S _ 3.96 236 May...... 1,563.8 131 3.6 50.4 3,100 June ...... 5,364 145 63 112 6,670 July...... 761.3 81 4.4 24.6 1,510 August ...... 67.4 4.1 2.3 2.82 173 September ...... 64.6 2.6 1.9 2.15 12S Water year' 1943-44 ...... 6,604.6 145 - 18.0 13,100 e Winter discharge measurement made on this day. a Ho gage-height record (stage-discharge relation affected by Ice during most of period); discharge computed on basis of 1 discharge measurement at station, 3 discharge measurements 4 miles downstream, and weather records. b Stage-discharge relation affected by Ice. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 97

Cement Creek near Crested Butte, Colo.

Location.- Water-stage recorder, lat. 38°50', long. 106°50', In sec. 13, T. 14 S., R. 85 to., near Pioneer Resort, li miles upstream from Ward Gulch and 9 miles southeast of Crested Butte. Drainage area.- 27.7 square miles. Records available.- November 1910 to November 1913, April 1941 to September 1944. Extremes.- Maximum discharge during year, 232 second-feet June 10 (gage height, 2.79 feet); minimum observed, 7.0 second-feet Feb. 7 (discharge measurement), but probably less during period of no gage-height record. 1910-13, 1941-44: Maximum discharge observed, 330 second-feet June 7, 1912 (gage height, 1.9 feet, site and datum then In use), from rating curve extended above 270 second-feet; minimum observed, 6 second-feet at times In January and February 1913. Remarks.- Records excellent except those for Nov. 2, 3, Nov. 7 to May 31, which are fair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 19 17 \ 19 186 106 33 21 2 19 b!6 18 173 100 32 20 3 19 bIS 18 144 96 31 20 4 19 *19 19 116 S7 30 20 5 19 IS 20 104 69 30 20 6 *19 17 24 114 80 30 20 7 19 b!6 («) 32 144 66 29 20 8 19 b!6 42 140 71 29 20 9 19 b!6 («) 30 1S1 6S 29 20 10 19 17 *32 210 68 29 19 11 19 17 38 206 64 28 19 12 19 17 52 195 60 27 19 13 IS 16 («) 61 1S8 56 26 19 14 18 16 68 1S8 53 26 19 15 18 16 13 11 10 ( 13 16 80 1S2 52 26 20 16 18 16 9S 182 51 26 19 17 18 16 87 171 4S 25 19 18 17 15 69 173 46 25 19 19 19 15 61 179 44 26 18 20 17 15 64 177 43 26 18 21 18 15 69 173 42 26 18 22 19 15 98 162 40 24 18 23 18 15 140 157 3S 24 IS 24 17 15 142 162 39 24 18 25 18 15 135 162 38 25 19 26 18 14 124 157 36 23 20 27 18 13 122 140 37 23 20 28 19 12 151 127 35 22 19 29 19 13 171 122 34 S2 19 30 IS 13 _ 164 114 35 22 18 31 17 - - - 201 33 22 » - Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

October...... 570 19 17 18.4 1,130 November...... 466 19 12 15.5 924 December ...... 403 13 799 Calendar year 1943 ...... 12,634 150 34.6 25,060 January ...... 341 11 676 February...... 290 _ _ 10 575 March...... 403 _ _ 13 799 April...... 4SO _ _ 16 952 May 2,469 201 ie 79.6 4,900 June ...... 4,829 210 104 161 9,580 July...... 1,735 106 33 56.0 3,440 August ...... 820 33 22 26.5 1,630 September ...... 576 21 18 19.2 1,140 Water year 1943-44 ...... 13,382 210 - 36.6 26,540 * Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Hote.- Ho gage-height record Nov. 10 to Hay 9 (stage-discharge relation probably affected by loe during most of period); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 98 3UNNISON RIVER BASIN

Ohio Creek near Baldwin, Colo.

Location.- Water-stage recorder, lat. 38°42', long. 107°00', in SWi sec. 34, T. 15 S., R. 86 w., 800 feet dovmstream from Mill Creek and 5i miles southeast of Baldwin. Drainage area.- 124 square miles. Records available.- April 1941 to September 1944. Extremes.- Maximum discharge during year, 1,040 second-feet May 17 (gage height, 4.21 feet), from rating curve extended above 700 second-feet; minimum daily, 14 second- feet Feb. 2-4, 7-9, 11-14. 1941-44: Maximum discharge, that of May 17, 1944; minimum daily recorded, 11 second-feet Oct. 8-12, 1942, probably less during period of no gage-height record. - Remarks.- Records excellent except those for period of ice effect or no gage-height record, which are fair. Many small diversions above station for irrigation.

Rating tables, water year 1943-44, except periods of Ice effect (gage height, In feet, and discharge. In second-feet) Oct. 1 to Nov. 30 Apr. 14 to Sept. 30 0.7 17 1.2 2.5 400 .S 23 1.3 S7 3.3 680 1.5 122 4.2 1,040 .8 1.8 192 1.0 2.2 306

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 23 29 19 17 15 17 17 99 645 333 68 27 2 22 29 19 17 14 17 18 90 586 315 70 26 3 22 38 20 17 14 17 19 70 547 349 66 25 4 22 36 22 17 14 17 21 73 446 318 65 24 5 22 32 23 16 15 16 22 106 36S 297 61 22 6 21 26 23 16 15 16 25 170 352 252 64 22 7 21 b24 23 16 14 16 30 243 404 215 65 21 8 21 b25 22 15 1,4 16 38 294 424 20S 63 21 9 21 b29 21 15 14 16 50 297 424 215 66 21 10 21 b29 21 15 15 16 55 282 484 215 68 SO 11 21 b30 20 15 14 16 60 358 494 187 63 19 12 27 b29 21 15 14 16 76 442 456 161 57 19 13 24 b28 21 16 14 16 76 526 421 149 53 19 14 27 27 21 16 14 16 *b6S 617 400 137 SO 19 15 26 29 20 17 15 15 b62 720 368 140 48 20 15" 16 25 28 21 17 15 b58 844 381 137 46 19 17 25 30 21 17 15 16 b56 792 330 126 45 1& 18 21 SB 21 17 15 17 bS6 494 324 .115 45 17 19 85 26 21 17 15 16 b54 438 355 122 44 16 20 24 27 21 17 15 17 b54 452 400 124 43 16 21 24 27 21 17 16 17 b52 491 424 111 41 16 22 25 24 21 17 16 16 b52 564 410 102 3S 17 23 25 22 21 17 16 16 b54 684 365 99 36 17 24 23 22 20 17 16 16 b60 776 387 109 35 16 25 24 22 19 17 16 16 63 696 410 115 36 17 26 24 b20 19 16 17 16 76 631 384 101 32 19 27 24 b!9 19 15 17 16 80 540 342 87 30 19 28 27 b!8 18 15 16 16 158 540 300 80 28 19 29 30 b!8 17 16 16 17 92 6SO 297 74 28 18 30 29 b!8 17 15 17 86 6S8 309 74 27 18 31 29 - 17 15 - 17 - 692 - 72 27 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 745 30 21 24.0 1,480 November ...... 789 38 IE 26.3 1,560 December ...... 630 23 17 20.3 1,250 Calendar year 1943 ...... 40,933 645 _ 112 81,200 January ...... 502 17 15 16.2 996 February ...... 436 17 14 15.0 865 March...... 504 17 15 16.3 1,000 April...... 1,688 158 17 56.3 3,350 Hay. 14,389 844 7C 464 28,540 June ...... 12,237 645 297 40 6 24,270 July...... 5,139 349 S 72 166 10,190 August 1,510 70 27 48. 7 3,000 September...... 587 27 16 19.6 1,160 Water year 1943-44 ...... 39,156 844 14 107 77,660 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- No gage-height record Dec. 1 to Apr. 13 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 3 discharge measurements and weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. OUNNISON RIVER BASIN 99

Tomichi Creek at Sargente, Colo.

Location.- Water-stage recorder, lat. 38°24', long. 106°25', In SWi sec. 21, T. 48 N., K. b E., half a mile downstream from Marshall Creek and three-quarters of a mile south of Sargents. Drainage area.- 155 square miles. Records available.- May 1917 to September 1922, April 1938 to September 1944. Average discharge.- 11 years, 70.0 second-feet. Extremes.- Maximum discharge during year, 461 second-feet June 10 (gage height, 2.38 reet); minimum dally, 15 second-feet Jan. 13, 14. 1917-22, 1938-44: Maximum discharge, 792 second-feet June 9, 1921 (gage height, 4.05 feet, site and datum then In use), from rating curve extended above 600 second- feet; minimum recorded, 6 second-feet Nov. 16, 1920. Remarks.- Records good except those for period of ice effect or no gage-height record, wnicn are fair. Diversions above station for irrigation.

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 32 28 20 18 21 23 27 54 399 116 33 26 2 32 23 21 18 22 23 27 57 380 10S 33 25 3 32 25 21 17 23 23 28 44 413 103 32 25 4 31 28 22 17 24 22 29 44 352 105 31 25 5 31 25 22 17 24 22 31 60 298 101 31 26 6 «30 20 22 17 24 22 34 96 301 96 32 25 7 29 19 22 17 24 23 38 120 346 81 32 25 8 29 19 21 17 24 *24 40 122 315 78 30 24 9 29 20 21 17 24 25 40 130 366 79 31 24 10 29 21 21 16 24 25 42 132 410 72 34 24 11 29 21 21 16 24 25 40 »126 396 66 31 26 12 34 21 22 16 24 25 45 169 360 60 29 26 13 35 21 22 15 24 25 «49 190 338 55 28 25 14 35 21 22 15 24 25 46 212 310 4S 28 25 15 35 21 22 16 24 24 42 245 284 50 28 25 16 35 20 21 16 24 23 38 293 282 57 28 24 17 34 20 21 16 24 24 37 301 253 52 2S 24 18 34 20 22 17 24 25 36 229 234 50 29 24 19 36 20 22 18 24 25 32 214 224 48 33 24 20 35 21 22 18 24 26 33 229 214 66 32 23 21 36 21 22 19 24 26 37 232 207 64 32 23 22 40 22 21 19 24 26 33 263 190 51 29 24 23 36 22 21 20 24 26 42 329 169 48 2s 24 24 35 22 21 20 24 25 42 366 162 51 30 23 25 39 20 20 20 25 25 3S 394 157 57 34 24 26 35 20 20 19 25 25 43 360 157 44 28 27 27 32 19 20 19 25 24 57 312 137 40 27 31 28 30 19 19 20 25 24 71 307 126 39 26 28 29 34 19 19 20 25 25 54 352 124 37 26 27 30 33 19 19 20 - 26 47 382 120 37 2ff 26 - - - 26 ~ 31 32 _ IS 21 26 408 34 Second Runoff in Month foot-days Maximum Minimum Mean acre feet

October...... 1,028 40 29 33.2 2,040 November...... 637 28 19 21.2 1,260 December...... 650 oo** IE 21.0 1,290 Calendar year 1943 ...... 24,636 368 13 67.5 48,880 January ...... 551 21 15 17. S 1,090 February ...... 695 25 PIej 24.0 1,380 March...... 26 2£ 24.4 1,500 April ...... 1 1QS 71 27 39 9 May...... fi*77P 408 44 21 R* 13)430 June ...... "...... S,024 413 120 267 15,920 July ...... 1,993 116 34 64.3 3,950 August ...... 34 26 29 S 1,830 September...... 752 31 *.o 25.1 1,490 Water year 1943-44 ...... 23,982 413 15 65.5 47,560 » Winter diacharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov.. 1 to Apr. 17 (no gage-height record to Apr. 12; discharge computed on basis of 3 discharge'measurements and weather records). Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 100 GUNNISON RIVER BASIN

Tomlchl Creek at Gunnison, Colo.

Location.- Water-stage recorder, lat. 38°32', long. 106°56', in sec. 11, T. 49 N., R. 1 W., naif a mile upstream from mouth and 1 mile south of Gunnison. Datum of gage is 7,628.58 feet above mean sea level, datum of 1929. Drainage area.- 1,020 square miles. Records available.- April 1938 to September 1944. November, December 1910 (gage heights only, datum then in use). Extremes.- Maximum discharge during year, 943 second-feet May 17 (gage height, 3.26 feet); minimum dally, 50 second-feet Jan. 9, 10. 1938-44: Maximum discharge, 1,530 second-feet Mar. 24, 1939, from rating curve extended above 1,000 second-feet; maximum gage height, 3.97 feet May 28, 1942; minimum daily discharge, 26 second-feet Sept. 16, 17, 19, 1940. Remarks.- Records good except those for Dec. 7 to Apr. 30, which are fair. Diversions aoove station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jaji. Feb. Mar. Apr. May June July Aug. Sept.

1 76 148 80 62 6S 7S 88 220 850 340 137 98 2 73 126 76 62 74 78 90 250 850 326 134 91 3 74 108 86 62 72 78 94 254 866 331 131 89 4 73 118 82 62 70 78 100 192 888 350 123 87 5 73 151 86 52 74 76 120 178 888 340 120 84 6 74 160 84 56 74 74 135 231 762 336 126 82 7 73 100 b84 58 74 72 145 375 706 304 134 80 8 74 78 b86 54 74 72 150 460 723 264 140 78 9 74 137 b86 50 76 74 165 500 740 223 142 74 10 76 154 1)84 50 76 75 165 515 745 212 157 70 11 80 142 b82 56 76 78 170 555 7S4 175 163 63 12 86 123 b76 56 76 82 220 465 800 172 148 59 13 87 126 b78 58 76 86 *282 560 784 163 137 59 14 93 134 b80 58 76 86 239 670 765 145 131 57 15 112 120 78 62 78 84 181 800 728 140 128 56 16 108 115 76 62 76 82 172 838 723 145 126 57 17 110 112 76 64 74 84 154 916 685 140 120 57 18 108 115 78 62 74 86 151 904 630 131 118 57 19 115 120 80 62 76 86 151 806 610 131 120 57 20 123 1E6 80 64 78 86 163 712 580 157 120 56 21 115 118 80 64 78 86 151 712 580 188 118 56 22 115 126 80 68 76 86 145 718 570 172 110 56 23 115 142 78 * 70 76 84 142 734 535 154 110 56 24 120 134 76 72 78 84 142 762 495 154 108 56 25 110 128 74 70 80 82 160 794 485. 205 123 56 26 110 118 68 66 78 84 163 816 490 195 131 59 27 115 80 62 64 76 84 175 822 460 175 118 62 28 115 66 58 66 76 *84 309 772 420 169 108 62 29 134 73 58 68 76 84 425 712 380 160 105 60 30 172 74 62 68 . 84 272 734 355 154 100 59 31 163 - 62 66 - 88 - 800 - 151 98 - Second- Runoff in Month foot-daya Maximum Minimum Mean ' ao re-feet

October ...... 3,146 172 7 5 101 6,240 November ...... 3,572 160 6 5 119 7 080 December ...... 2,376 86 5 3 76.6 4^710 Calendar year 1943 ...... 71,321 7S8 5 3 195 141,400 January...... 1,914 72 5() 61.7 3,800 February...... 2,186 80 6 3 75.4 4,340 ilaroh...... 2,525 88 7!! 81.5 5,010 . April...... 5,219 425 8(3 174 10,350 May...... 18,797 916 17 3 606 37,280 June ...... 19,868 888 35J 662 39,410 July...... 6,402 350 13] 207 12,700 August ...... 3,884 163 9f3 125 7,700 September...... 1,993 98 5« 66.4 3,950 Water year 1943-44 ...... 71,882 916 5C 196 142,600 » Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Nojbe^- No gage-height record Dec. IS to Apr. 12 (stage-discharge relation affected by ioe during most of period); discharge computed on basis of 4 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GUNOTSON RIVER BASIN 101

Quartz Creek near Ohio, Colo.

Location.- Water-stage recorder, lat. 38°34', long. 106°38', in SW$ sec. 27, T. 50 N., R. 3 E., half a mile downstream from Willow Creek and 1 mile southwest of Ohio. Drainage area.- 101 square miles. Records available.- April 1938 to September 1944. Extremes.- Maximum discharge during year, 345 second-feet June. 9 (gage height, 1.84 reet); minimum daily, 14 second-feet Mar. 8. 1938-44: Maximum discharge, 640 second-feet May 26, 1942 (gage height, 2.90 feet), from rating curve extended above 470 second-feet: minimum daily. 10 second-feet Feb. 6, Sept. 16, 17, 1940. Remarks.- Records fair. Small diversions above station for Irrigation. Slight regulation by small power plant 3 miles above station.

Discharge, in second-feet, water year October 1943 to September 1944 Da, Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 27 29 b27 23 23 18 21 32 234 91 38 27 Z 24 32 b27 23 23 18 23 32 210 93 36 32 3 21 36 2S 22 24 18 24 27 198 100 33 20 4 23 36 29 22 »24 17 25 27 169 91 38 20 5 23 31 30 21 24 16 28 31 150 89 38 20 e 23 »29 30 21 24 15 31 44 161 89 37 21 7 24 28 30 21 24 15 31 49 216 85 38 21 8 24 1)27 29 20 24 »14 31 51 198 78 3S 22 9 25 b30 28 SO 24 16 31 52 246 69 38 28 10 26 31 2S 19 23 17 27 50 249 68 41* 21 11 27 30 28 19 23 17 29 4S 204 64 36 21 12 31 31 28 19 23 17 33 66 172 63 36 22 13 31 31 2S 19 23 17 *32 91 169 60 34 28 14 35 27 28 »19 23 17 27 111 153 57 33 22 15 36 27 2S 20 23 17 29 130 153 57 32 22 16 35 27 28 21 22 17 27 143 166 57 32 22 17 35 27 28 21 22 17 27 130 153 54 32 22 18 33 27 2S 21 22 18 27 al!5 148 51 32 21 19 36 27 23 21 22 18 25 a!08 161 54 32 21 20 34 27 28 21 22 19 25 al!2 161 62 36 21 21 29 27 28 22 21 18 24 8120 156 56 37 21 22 31 29 27 23 21 18 24 a!26 136 52 34 22 23 32 30 26 23 21 IS 24 a!45 123 50 33 23 24 29 31 26 23 21 18 27 166 123 51 32 22 25 31 30 26 23 21 17 26 210 121 50 33 24 26 32 b27 25 22 21 17 27 195 116 46 32 28 27 31 b26 25 22 21 17 31 161 100 41 31 29 28 32 b£6 24 23 20 17 32 161 94 40 29 27 29 37 b26 23 23 19 blB 32 225 96 39 23 24 30 35 b26 23 23 b!9 30 258 94 40 29 24 31 33 - 23 23 - 20 - 246 - 40 29 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 925 37 2 1 29. 8 1,830 November...... 86 £ 36 2 3 28.9 1,720 December ...... 842 30 2;S 27.2 1,670 Calendar year 1943 ...... 24,877 400 IS) 6S.2 49,330 January...... 663 23 1 5 21.4 1,320 February...... 648 IE) SD.3 1,290 March...... 535 £0 1

Cochetopa Creek near Parlln, Colo.

Location.- Water-stage recorder, lat. 38°24', long. 106°46', in NWi sec. 28, T. 48 N., R. z K., at Timney Ranch, 1 mile downstream from Bead Creek and 8 miles southwest of Parlin. Datum or gage is 8,131.76 feet above mean sea level, datum of 1929. Drainage area.- 346 square miles. Records available.- April 1941 to September 1944. Extremes.- Maximum discharge during year, 594 second-feet May 14 (gage height, 5.02 feet), from rating curve extended above 380 second-feet: minimum daily, 12 second-feet Sept. 12, 13, 19. 1941-44: Maximum discharge, that of May 14, 1944; minimum daily, 6.6 second-feet Sept. 30, 1942. Remarks.- Records good except those for periods of Ice effect or no gage-height record, wnicn are fair. Diversions above station for Irrigation.

Discharge, in-second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 18 26 20 i-e 21 26 36 93 307 1C8 52 27 2 19 24 20 18 21 27 38 111 298 124 54 26 3 20 28 20 17 22 28 42 77 305 50 26 4 SO 36 20 17 *23 27 48 57 291 130 44 28 5 20 *4S 30 18 23 26 50 64 215 130 48 28 6 20 39 19 17 23 25 50 146 198 133 51 29 7 21 37 18 17 23 24 50 240 227 110 49 32 8 25 25 18 16 22 *23 56 285 266 75 48 9 25 25 18 16 22 24 68 270 244 73 49 27 10 *25 26 18 15 22 25 76 324 250 73 57 18 11 27 25 19 15 22 26 78 248 268 89 50 13 12 32 24 19 15 22 27 88 308 268 70 45 12 13 34 23 19 14 23 2B *100 387 242 65 43 -IS 14 31 23 19 *14 23 28 73 480 216 61 40 13 15 31 23 19 15 23 28 48 446 211 59 42 15 16 32 22 19 16 24 27 51 482 203 60 41 16 17 50 22 20 16 23 28 42 446 184 57 40 15 18 29 22 20 17 23 42 339 176 56 43 15 19 36 23 20 18 23 28 48 284 178 55 47 12 20 33 23 19 IB- 23 29 54 296 179 77 43 13 21 25 £3 19 19 24 29 48 313 194 63 40 13 22 26 23 18 19 24 29 48 318 189 54 36 14 23 33 23 18 20 25 29 42 327 166 49 35 15 24 28 21 18 20 26 30 49 318 170 67 36 15 25 34 CO 18 20 26 31 60 315 171 69 55 17 26 36 20 18 19 26 30 58 307 168 60 40 21 27 34 20 18 20 26 30 106 274 168 55 33 22 28 36 20 18 20 26 31 280 220 149 54 31 - 22 29 40 20 18 SO 26 33 227 227 142 56 29 20 30 37 20 18 20 - 34 89 295 139 62 28 20 31 30 ~ 18 20 - 35 - 318 - 56 28 Second- Runoff in Month foot-days Maximum. Minimum Mean acre-feet

October...... 887 40 IE 28.6 1,760 November...... 754 48 20 25 . 1 1,500 Decembsr ...... 583 20 IE 18. S 1,160 Calendar year 1943 ...... 12,306 104 33.7 24,420 January...... 544 20 14 17.5 1,080 February...... 680 26 21 23.4 1,350 March...... 873 35 23 1,730 April ...... 2,145 280 36 7K5 4,250 May...... 8,615 482 57 278 17,090 June ...... 6,382 307 139 213 12,660 July...... 2,392 133 49 77.2 4,740 August ...... 1,327 57 28 42.8 2, 630 September...... 584 32 12 19.5 1,160 Water year 1943-44 ...... 25,766 482 12 70.4 51,110 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov. 8-28. Ho gage-height record Hov. 29 to Apr. 12 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 103

Cebolla Creek at Powderhorn, Colo.

Location.- Water-stage recorder, lat. 38017'30", long. 107°07'00", In SEi sec. 29, T. 47 N., R. 2 W., 250 feet downstream from Powderhorn Creek and half a mile north of Powderhorn. Drainage area.- 334 square miles. Records available.- April 1938 to September 1944 (no winter records In 1944). Extremes.- Maximum discharge during year, 2,150 second-feet May 16 (gage height, 3.00 reetj, from rating curve extended above 710 second-feet; minimum dally, not determined. 1938-44: Maximum discharge, that of May 16, 1944; minimum dally, 22 second-feet July 14, 1940. Remarks.- Records good except those for period of Ice effect or no gage-height record, ana those above 1,000 second-feet, which are fair. Diversions above station for Irrigation.

Discharge, in seccnd-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 si 61 _ 122 940 244 99 Y6 2 81 56 _ 146 970 236 99 74 3 78 65 _ 115 850 232 92 74 4 Y8 72 - 101 602 217 94 72 5 76 74 - 146 488 213 99 72 6 76 61 _ 335 563 202 102 61 7 74 42 - 560 767 195 108 5S 8 72 640 _ 584 659 170 105 56 9 72 643 _ 739 870 166 120 58 10 a74 bSO - 840 920 166 126 61 11 a76 657 186 840 840 166 108 61 12 a 80 bS4 154 1,050 731 159 102 61 13 a70 653 112 1,040 602 156 102 61 14 a6e 653 65 1,310 594 149 99 61 15 a68 51 60 1,350 634 146 94 65 16 a6S 51 61 1,520 578 149 92 69 17 a70 56 60 1,080 470 146 97 74 18 a72 65 65 602 470 139 102 Y2 19 a77 58 . 76 594 482 142 102 67 20 866 56 74 618 494 163 102 65 21 67 53 61 626 488 149 99 52 22 74 60 60 686 440 142 102 51 23 67 56 5S 821 380 142 99 51 24 61 45 67 960 39E 152 97 51 25 70 51 7S 1,040 375 152 94 56 26 70 42 72 850 370 135 92 67 27 67 26 178 677 335 126 89 72 28 70 632 2S8 578 295 117 S6 67 29 85 639 146 704 272 111 Si 67 30 78 63 S 126 930 256 105 79 67 31 70 - 1,000 - 105 76 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 2,256 85 63 72 s 4,470 November ...... 1,560 74 2e 52^0 3,090 December...... Calendar year ...... _ - . _ _ Jannary...... ~ " February...... _ _ _ March...... _ _ _ _ _ April 11-30...... 2,047 288 5E 102 4,060 May...... 22.564 1,520 10] 728 44,760 June ...... 17,127 970 256 35,970 July...... 4,992 244 10E 161 9,900 August...... 3,038 126 7C 98.0 6,030 September...... 1,913 76 5] 63.8 3,790 ffatar year ...... - - - - - * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on 6asls of records for stations on nearby 6 Stage-discharge relation affected 6y Ice. Time 6aala^ Mountain war time. To convert war time to standard time, su6traot 1 hour. 104 QUMNISON RIVER BASIN

Lake Fork at Gateview, Colo.

Location.- Water-stage recorder, lat. 38°07'50", long. 107°13'25", in sec. 29, T. 47 N. K. aw., at old village of Gateview, a quarter of a mile upstream from Indian Creek and about 15 miles upstream from mouth. Datum of gage is 7,828.66 feet above mean sea level, datum of 1929. Drainage area.- 324 square miles. Records available.- April 1938 to September 1944 (no winter records 1939, 1943, 1944). Extremes.- Maximum discharge during year, 2,100 second-feet June 25 (gage height, 3.07 feet;; minimum daily recorded, 76 second-feet Nov. 27, Dec. 1. 1938-44: Maximum discharge, 2,620 second-feet June 21, 1938 (gage height, 5.00 feet), from rating curve extended above 1,800 second-feet; minimum daily, 28 second- feet Feb. 18, 1942. Remarks.- Records excellent except those for Oct. 1-26, May 14-31, which are fair. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 122 98 76 _ 148 1,800 1,510 383 ISO 2 115 94 87 _ 152 1,730 1,540 363 138 3 112 84 82 _ 142 1,520 1,430 347 142 4 108 96 77 - 135 1,200 1,410 351 125 5 102 *104 84 - 164 959 1,400 359 125 6 98 100 92 _ 241 1,000 1,350 395 113 7 93 89 S7 _ 347 1,280 1,240 420 111 8 93 85 - _ 367 1,240 1,120 403 106 9 94 92 - _ 415 1,450 1,120 347 104 10 95 94 - - 438 1,680 1,050 315 96 11 100 90 _ *b!52 451 1,770 973 291 94 12 103 90 - 179 546 M.,720 833 271 92 13 100 90 _ 158' 710 1,570 752 255 94 14 95 90 - 125 988 1,720 674 241 92 15 93 87 - 108 1,290 1,690 692 234 92 16 93 86 . 108 1,560 1,620 674 224 94 17 94 86 - 98 1,410 1,330 640 216 88 18 100 89 . 104 973 1,320 625 216 90 19 104 89 - 106 826 1,520 600 216 86 20 95 89 - 108 868 1,710 560 202 86 21 96 37 _ 102 996 1,840 620 188 86 22 104 90 - 98 1,120 1,640 565 182 84 23 97 93 _ 98 1,320 1,720 528 176 84 24 94 90 - 113 1,460 1,920 514 176 81 25 90 87 - 118 1,480 1,990 500 192 84 26 110 87 _ 123 1,480 1,860 487 192 86 27 113 76 - 179 1,280 1,790 460 192 68 28 99 77 - 210 1,180 1,660 446 192 90 29 107 80 - 164 1,520 1,600 428 185 92 30 119 78 - 150 1,840 1,600 420 179 94 31 100 ~ - 1,870 403 167

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 3,138 122 9C 101 6,220 November ...... 2,667 104 7£ 88.9 5,290 December 1-7 ...... 585 92 76 83.6 1,160 Calendar year ...... - - - _ _ January...... February...... _ _ _ _ _ March _ _ _ _ April 11-30 ...... 2,601 210 , 98 130 5,160 Hay...... 27,717 1,870 135 894 54 980 June ...... 47 , 579 1,920 959 1,586 94)370 July 25,614 1,540 403 826 50,800 August...... 8,070 420 167 260 16.010 September ...... 2,987 150 81 99.6 5,920 Water year ...... - - - - - * Winter discharge measurement made this day. b Stage-discharge relation affected by ice. Note^- No gage-height record Oct. 1-26; discharge computed on basis of records for station nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 105

Cimarron Creek below Squaw Creek, at Cimarron, Colo. Location.- Water-stage recorder, lat. 38°26'40", long. 107°33'30", in sec. 5, T. 48 N., R. 6 W., 850 feet downstream from Squaw Creek and a quarter of a mile northeast of Cimarron. Datum of gage is 6,864.10 feet above mean sea level, datum of 1929. Prior to Oct. 20, 1943, staff gage at site 150 feet downstream at different datum. Drainage area.- 232 square miles. Records available.- April 1943 to September 1944. Extremes.- Maximum discharge during year, 1,290 second-feet ^ 16 (gage height, 6.17 feet), from rating curve extended above 750 second-feet; minimum daily, 14 second-feet Sept. 11, 14. 1943-44: Ifeximum discharge, that of my 16, 1944; minimum daily, 14 second-feet Sept. 25-27, 1943, Sept. 11, 14, 1944. Remarks.- Records excellent except those for Oct. 1 to Nov. 27, which are good, and those for Nov. 28 to Mar. 27, which are fair. During period April to September 1944, 23,100 acre-feet were diverted above station to Uncompahgre River Basin by Cimarron and Owl Creek ditches. Several small diversions in Cimarron Creek Basin for irrigation.

Rating tables, water year 1943-44, except period of ice effect (gage height, in feet, and discharge, In second-feet) (Shifting-control method used Oct. 13 to Nov. 27) Oct. 21 to Sept. 30 2.0 17 2.3 1.9 2.4 39 4.3 430 2.1 20 2.5 2.0 2.5 50 4.8 600 2.2 24 2.7 2.1 2.7 79 5.7 1,030 2.2 3.0 133 2.3 3.6 257

Dischargs, in second-feet, water yesr October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 62 37 41 41 36 32 64 153 825 481 41 18 2 61 31 44 41 35 33 72 149 775 511 37 16 3 60 37 43 41 *32 34 91 107 721 472 33 16 4 57 39 43 41 33 34 110 94 518 427 28 15 5 57 44 43 40 34 33 141 133 430 472 30 15 6 53 *37 45 41 33 33 141 222 475 414 30 16 7 52 26 46 42 32 #32 137 302 584 386 27 16 8 54 37 48 41 33 30 125 304 568 330 25 16 9 44 51 47 38 34 31 118 342 726 333 27 16 10 18 46 46 38 35 33 103 396 900 318 27 15 11 19 38 45 «42 33 34 125 401 960 299 27 14 12 30 43 44 42 32 35 141 475 875 266 27 15 13 26 60 46 37 32 35 112 640 716 235 22 15 14 26 72 46 36 33 35 76 745 760 207 20 14 15 28 61 45 37 33 34 #73 850 840 169 21 16 16 30 58 44 38 33 33 72 1,000 780 231 22 16 17 32 58 43 40 33 34 67 830 608 235 22 16 18 38 64 44 41 33 35 67 542 658 215 22 15 19 48 60 45 41 33 34 74 466 721 205 24 15 20 #46 61 46 40 51 34 67 490 800 199 23 16 21 42 54 46 39 32 35 63 560 850 147 22 16 22 37 64 46 36 32 30 56 584 S30 114 22 16 23 37 64 46 38 32 34 58 694 760 101 21 16 24 33 61 46 37 32 36 73 770 640 124 21 16 25 37 61 45 36 33 35 74 632 820 116 24 22 26 38 48 44 34 33 34 82 608 810 81 22 27 27 37 33 41 34 33 35 114 532 712. 64 20 33 28 39 36 38 33 31 33 211 484 592 56 20 30 29 43 38 40 33 31 34 161 644 560 50 19 31 30 43 40 42 33 _ 48 193 830 542 47 20 30 31 37 - 40 35 - 68 - 860 - 43 20 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 1,264 62 IE 40.8 2,510 November ...... 1,459 72 26 48.6 2,890 December ...... 1,368 48 38 44.1 2,710 Calendar yesr ...... _ _ _ _ _ January...... 1,188 42 33 38.3 2,360 February ...... 952 36 31 32.8 1,890 March...... 1,090 68 30 35.2 2,160 April ...... 3,061 211 56 102 6,070 May...... 15,839 1,000 94 511 31,420 June ...... 21,556 960 430 719 42,760 July...... 7,350 511 43 237 14,580 August ...... 766. 41 19 24.7 1,520 September ...... 548 33 14 18.3 1,090 Water year 1943-44 ...... 56,441 1,000 14 154 112,000 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by Ice Nov. 28 to Dec. 18. No gage- height record Dec. 19 to Mar. 27 (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 8 106 OUNNISON RIVER BASIN

Smith Fork near Crawford, Colo.

Location.- Water-stage recorder, lat. 38°44', long. 107°31', in sec. 24, T. 15 S., R. 91 W., just upstream from Second Creek, 6 miles northeast of Crawford. Altitude of gage, 7,200 feet (by barometer). Drainage area.- 42.3 square miles. Records available.- February 1941 to July 1944 (discontinued). Extremes.- Maximum discharge during period October to July, 507 second-feet May 16 (gage height, 3.67 feet); minimum daily, 6.6 second-feet Feb. 12. 1941-44: Maximum discharge, 513 second-feet May 13, 1941 (gage height, 3.80 feet), from rating curve extended above 430 second-feet; minimum daily, 2.0 second-feet Feb. 11, 1941. Remarks.- Records fair except those for period of ice effect or no gage-height record, wnicn are poor. A few small diversions above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 11 13 b8.4 7.0 7.2 7.6 10 43 294 86 11 bS.O 7.0 7.2 7.6 10 52 11 11 7.6 7.2 7.2 7.6 12 32 256 11 11 7.8 7.2 7.2 7.8 13 33 212 69 10 12 B.O 6.8 7.2 7.8 15 54 190 67 6 10 11 8.0 6.B 7.0 7.4 17 119 222 59 11 B.O 7.0 7.0 7.4 19 171 264 54 11 b9.0 B.O 7.0 7.0 7.8 21 230 248 55 11 10 8.0 7.0 7.0 8.2 23 272 262 55 10 10 7.8 7.0 7.0 8.4 22 306 300 57 11 11 10 7.4 7.2 6.8 8.6 E5 359 290 12 10 7.6 7.0 6.6 B.6 30 380 268 48 12 *10 7.8 7.0 6.8 8.8 35 420 256 45 12 10 B.O 7.4 7.2 9.0 31 411 260 12 9.7 7.6 7.8 7.2 9.6 27 423 232 . 16 12 9. 7.4 8.0 7.2 9.6 25 456 220 12 9. 7.6 7.6 7.2 9.6 24 382 202 _ 12 10 7.8 7.6 7.2 9.8 23 278 182 _ 14 9. 8.0 7.4 7.2 9.8 *23 216 190 _ 13 9.' 23 21 13 9. B.Q 7.6 7.2 9.8 20 228 188 13 9. 8.0 7.8 7.2 9.8 20 292 164 _ 13 9. 8.0 7.6 7.2 9.8 20 324 143 _ _ 12 9. .8 7.4 *7.4 9.8 23 366 137 _ 12 9. .8 7.2 7.4 9.5 25 322 134 - 26 bB.B .6 .0 7.2 9.2 26 278 130 b7.B .6 .0 7.2 9.2 34 264 118 _ 12 bS.O .6 .2 7.2 9.2 39 274 108 _ .2 .2 7.2 9.0 32 330 _ .4 .0 - 9.0 _ " 37 335 .4 .0 - 9.2 322 - Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

December...... 241.2 8.4 7.C 7.78 478 Calendar year 1943 ...... 15,866.3 296 5.£ 43.5 31,460 445 2^*5 April ...... May...... 94

The period. .'...... - - - - 34 , 660 * Winter discharge measurement made on this day. b Stage-discharj-e relation affected by Ice. N°te.- No gage-height record Dec. 3 to Apr. 18 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 107

East Muddy Creek near Bardine, Colo.

Location.- Water-stage recorder, lat. 39°01', long. 107°22', in sec. 17, T. 12 S., R. B& w., a quarter or a mile downstream from Spring Creek and 6i miles upstream from Bardine. Datum-of gage is 6,654.78 feet above mean sea level, datum of 1929. Drainage area.- 136 square miles. Records available.- May 1935 to September 1944 (no winter records 1935-41). Extremes.- Maximum discharge during year, 1,440 second-feet May 16 (gage height, 2.78 feet), from rating curve extended above 1,100 second-reet; minimum daily recorded, 10 second-feet Nov. 27, but may have been less during period or no gage-height record. 1935-44; Maximum discharge, 2,190 second-feet May 13, 1941 (gage height, 3.41 feet), from rating curve extended above 800 second-feet; minimum daily, 6 second-feet Aug. 28, 1936. Remarks.- Records fair except those for period of no gage-height record, which are poor. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 19 23 844 203 36 21 Z 19 24 788 192 34 3 19 27 772 203 30 21 4 19 27 613 182 30 19 5 19 24 515 172 28 19 6 18 23 468 152 28 18 7 18 t>22 515 137 18 8 18 b20 590 515 123 24 17 9 18 b28 599 118 24 16 10 18 b36 676 115. 23 16 11 21 b35 652 105 23 16 12 22 32 578 92 22 16 13 CO *30 480 86 21 16 14 19 30 4S7 77 21 15 15 *19 30 462 75 21 15 15 14 13 17 ' 75 16 18 32 *1,230 462 72 21 15 17 18 30 1,120 396 66 19 15 18 18 24 828 360 60 Cl 14 19 20 25 700 354 62 23 14 20 20 23 748 372 66 24 14 21 19 27 (*) 844 372 62 23 14 22 19 23 1,060 348 56 23 13 23 19 24 1,170 300 50 22 13 24 18 25 1,160 300 52 S3 13 25 18 23 1,070 318 56 27 13 26 18 b!5 996 312 54 24 13 27 18 blO 940 275 46 23 13 28 19 b!3 940 226 45 22 12 29 22 b!4 956 210 43 21 12 30 24 b!3 - 956 210 46 21 12 31 24 - - - ,876 - 38 21 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

October...... 598 24 18 19.3 1,190 November ...... 732 36 10 24.4 1,450 December ...... 465 15 922 Calendar year 1943 ...... 25,489.5 496 7.£i 69.8 50,570 January...... 434 14 861 February...... 13 March...... S2V 17 1,050 April...... 2 °50 * ~ 75 4,460 May...... 24)444 1.230 48,480 June ...... 13 779 844 210 459 27,330 July...... 2)906 203 38 93.7 5,760 August ...... 36 19 24.2 1,490 September...... 464 21 12 15.5 920 Water year 1943-44 ...... 47,725 1,230 - 130 94 , 660 * Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Note.- No gage-height record Dec. 1 to May 15 (stage-discharge relation probably affected by ice during most of period); discharge computed on basis of 1 discharge measurement, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 108 GUNNISON RIVER BASIN

North Fork Gunnlson River near Somerset, Colo.

Location.- Water-stage recorder, lat. 38°56', long. 107°26', in sec. 10, T. 13 S., R. 90 W., '6 miles east of Somerset. Datum of gage is 6,038.6 feet above mean sea level, datum of 1939. Drainage area.- 521 square miles. Records available.- March 1934 to September 1944. Average discharge.- 10 years, 472 second-feet. Extremes.- Maximum discharge during year, 5,830 second-feet May 16 (gage height, 5.68 feet), from rating curve extended above 4,200 second-feet; minimum dally, 35 second- feet Nov. 27. 1934-44: Maximum discharge, 5,850 second-feet May 13, 1941 (gage height, 6.30 feet), from rating curve extended above 3,200 second-feet; minimum daily, 28 second- feet Sept. 19, 1934. Remarks.- Records excellent except those for perlode of ice effect or no gage-height record, and those for Apr. 28 to May 15, which are fair. Diversions above station for irrigation. Rating tables, water year 1943-44, except period of Ice effect (gage height. In feet, and discharge. In second-feet) (Shifting-control method used dpr. 26 to May 15) Oct. 1 to May 6 May 7 to Sept. 30 0.7 35 1.2 112 2.1 460 0. 7 60 1.5 275 3.2 1,650 .8 44 1.4 166 2.4 650 9 92 1.9 480 4.0 2,840 .9 56 1.6 234 2.8 970 1. 1 135 2."3 740 5.0 4,610 1.0 70 1.9 362 3.0 1,150 1. 3 195 2.7 1,080 5.7 5,870

Discharge/ in second-feet, water year October 1943 to September 1944 Day Oct. Nov.' Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 86 117 67 a59 60 64 86 562 3,140 1,500 199 104 2 84 92 86 b56 62 70 99 6 29 2,840 1,370 195 100 3 es 103 64 64 56 67 130 4!96 2,760 1,450 183 96 4 80 115 67 67 59 66 172 4 50 2,380 1,320 171 92 5 80 12£ 76 b53 64 57 230 562 2,020 1,240 165 89 6 78 110 86 b60 62 57 266 1,010 1,990 1,080 162 85 7 76 78 86 b68 60 59 291 1,5 50 2,260 948 153 84 8 76 67 78 b60 64 59 321 1,9 30 2,230 844 144 80 9 74 92 72 b57 76 80 353 2,3 50 2,400 828 147 77 10 74 101 67 b61 72 78 334 2,520 2,760 780 144 77 11 82 99 49 b66 57 78 391 3,120 2,790 696 133 70 12 112 97 52 b63 64 86 496 3,3 10 2,590 612 126 72 13 97 92 74 b56 67 90 574 4,0:SO 2,340 560 119 70 14 97 94 78 b64 66 97 400 4,4'70 2,340 510 117 69 15 92 86 67 80 69 97 325 4,700 2,290 474 117 74 16 88 86 66 299 4,950 2,280 442 128 72 67 60 88 4,3' 17 86 84 56 72 67 97 266 20 1,990 420 126 70 18 86 88 63 67 64 103 246 2,8*)0 1,960 395 130 69 19 101 80 72 69 56 92 266 2,5 30 1,990 380 135 69 20 108 84 76 69 66 97 250 2,680 2,170 395 135 68 21 99 78 74 *70 63 88 227 2,870 S.170 360 133 66 22 101 86 70 60 64 78 216 3,2 LO 2,020 335 133 66 23 103 88 70 60 59 78 223 3,7.50 1,860 315 130 66 24 99 90 67 62 64 88 274 4,0 )0 1,920 325 128 66 25 97 84 60 63 63 86 303 3,550 1,990 350 126 66 26 97 60 69 63 62 84 321 3,350 1,900 305 124 69 27 97 35 52 62 59 74 415 3,0'70 1,710 271 121 69 28 105 63 a46 60 64 64 556 3,1 X> 1,530 247 119 68 29 122 514 3,3S90 1,560 239 114 68 69 a56 60 60 63 3,4' 30 138 63 a66 60 74 514 JO 1,550 235 112 66 31 135 - a62 60 - 86 - 3,280 - 219 106 Seocnd- Runoff in Honth foot-daye Maximum Minimum Mean acre-feet

October ...... 2.93S 138 74 94.6 5,820 November...... 2,603 122 35 86.8 5,160 December...... 2,096 86 4E 67.6 4,160 Calendar year 194 3 ...... 154,681 2,570 33 424 306,800 January ...... 1,960 60 52 63.2 3,890 February...... 1,829 76 56 63.1 3,630 Iteroh...... 2,445 103 51 7B.9 4,850 April ...... 9,358 574 86 312 18,560 Bay...... 86,089 4,950 450 2,777 170,800 June ...... 65,730 3,140 1.53C 2,191 130,400 July...... 19,4'47 1,500 219 627 38,570 August ...... 4,277 199 10 £ 138 8,480 Septembet ...... 2,257 104 66 75.2 4,480 Water year 1943-44 ...... 201,023 4,950 3E 549 398,800 » Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of weather records. b Sbage-dlscharge relation affected by Ice. ' Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 109

Minnesota Creek near Paonla, Colo.

Location.- Water-stage recorder, lat. 38°52', long. 107°31', In sec. 1, T. 14 S., R. 91 w., naif a mile downstream from East Fork and 4| miles east of Paonia. Drainage area.- 41.3 square miles. Records available.- October 1941 to September 1944. Extremes.- Maximum discharge during year. 199 second-feet May 24 (gage height, 2.76 feet); minimum daily, 2.9 second-feet Sept. 23, 24, 30. 1941-44: Maximum discharge, 270 second-feet May 22, 1942 (gage height, 3.70 feet), from rating curve extended above 150 second-feet; minimum dally, 2.2 second-feet Sept. 24, 25, 1942. Remarks.- Records fair. One small storage reservoir and several small diversions above station for irrigation. One small diversion from Little Gunnlson Creek in Coal Creek Basin to Minnesota Cree'k Basin.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5.6 6.7 b4.6 b4.1 4.5 4.2 7.6 23 138 66 26 5.9 . 2 5.6 b6.7 b5.0 b3.7 4.8 4.2 7.6 24 137 64 26 S.6 3 5.3 b6.8 b5.3 b4.2 4.S 4.2 V.O 16 159 60 24 4.2 4 5,6 b7.0 b5.1 4.0 4.S 4.2 7.3 17 145 57 24 4.2 5 5.6 6.7 b5.0 b3.6 4.8 3.7 8.2 23 131 46 24 3.8 6 5.6 6.2 5.0 bS.S 4.8 b4.3 8.5 38 124 39 23 3.8 7 5.3 U4.7 5.0 4.3 5.0 b4.6 8.5 54 116 36 21 3.8 8 5.0 b4.0 5.0 3.9 5.6 b5.0 8.2 6S 131 31 21 3.7 9 5.0 b4.4 5.0 3.6 5.0 4.S 7.9 78 131 29 14 3.7 10 5.3 b4.8 b5.0 4.0 4.S 4.8 8.2 83 140 2S 8.5 3.7 7.6 b4.5 8.5 106 145 26 7.6 3.7 11 b4.6 4.3 "5.04.8 5.0 12 8.5 b4.4 b4.2 4.1 4.8 9.1 113 137 26 7.0 7.9 13 6.7 *b4.3 b4.4 3.9 4.5 5.6 12 131 116 25 6.7 8.2 14 7.3 b4.6 b4.7 4.2 b4.5 5.9 12 148 119 26 6.4 4.2 IS 6.4 b4.8 b4.4 5.0 4.8 5.6 11 162 lie 26 6.2 4.S 16 6.2 b4.6 b4.3 5.2 5.0 6.7 11 156 119 24 6.2 4.2 17 6.2 b5.0 b4.4 5.2 4.5 5.9 10 162 96 23 6.7 4.2 18 5.9 5.3 b4.7 5.0 4.2 5.3 11 126 SI 21 6.7 3.5 19 8.8 5.3 4.S 5.0 b4.6 5.6 11 103 77 21 14 3.3 20 6.7 5.0 4.5 5.0 5.3 4.8 16 102 81 21 18 3.3 21 6.4 5.3 4.2 5.0 5.0 5.3 10 104 82 20 18 3.1 22 6.7 5.3 4.2 4.8 4.2 #6.2 9.1 110 81 19 18 3.1 22 6.7 5.3 4.21 4.8 5.0 6.4 9.1 125 77 18 17 g 9 24 6.2 5.3 5.0 4.8 5.3 11 175 76 IS 17 2.9 25 6.2 5.0 b4.0 4.8 4.5 5.0 11 174 78 19 17 3,1 26 6.2 4.8 4,0 4.8 4.2 5.. 6 13 174 76 16 16 3.3 27 6.2 b4.0 b3.8 4.8 4.2 5.3 16 156 71 15 16 3.3 28 6.4 b4.3 b3.5 4.5 4.2 5.9 S3 158 70 13 14 3.1 29 7.0 b4.8 b3.9 4.5 4.2 6.4 24 164 70 13 14 3.1 30 7.6 b4.7 b4.7 4.5 - 6.7 26 166 68 21 14 2.9 31 7.3 ~ b4.4 4.5 ~ 7.6 ~ 150 - 26 12 - Second- Runoff in Month foot-days Maxinuin Minimum Mean acre-feet October ...... 197.1 8.8 5.0 6.36 391 November...... 154.6 7.0 4.0 5.15 307 December ...... 140.1 5.3 3.5 4.52 278 Calendar year 1943 ...... 7,817.7 104 3.0 21.4 15,510 January...... 138.1 5.2 3.6 4.45 274 February...... 135.8 5.3 4.2 4.68 269 March...... 164.9 7.6 3.7 5.32 327 April ...... 342.8 26 7.0 11.4 680 May 3,389 175 16 109 6,720 June ...... 3,190 159 68 106 6,330 July ...... 893 66 13 28.8 1,770 August ...... 470.0 26 6.2 15.2 932 September...... 120.5 8.2 2.9 4.02 239 Water year 1943-44 ...... 9,335.9 175 2 9 25.5 18,520 * Winter discharge measurement made on this day. b Stage-diaeharge relation affected_by ice. Kote.- No gage-height record Jan. 7-19 (atage-dlacharge relation probably affected by Ice during entire period); discharge computed on basis of weather records and recorda for atatlona on nearby streams. Time basis; Mountain war time. To convert war time to atandard time, aubtract 1 hour. 110 GUNNISON RIVER BASIN

Leroux Creek near Cedaredge, Colo.

Location.- Water-stage recorder, lat. 38°55', long. 107°48', in sec. 16, T. 13 S., R. 93 WTT^DO feet upstream from head gate of Overland ditch and 7.2 miles northeast of Cedaredge. Drainage area.- 43.0 square miles. Records available.- October 1936 to September 1944, no winter records (discontinued). Extremes.- Maximum discharge during year, 860 second-feet my 31 (gage height, 4.40 feet), rrom rating curve extended above 650 second-feet; minimum daily recorded, 5.5 second- feet Sept. 24, 25, probably less during period of no record. 1936-44: Maximum discharge, 1,310 second-feet May 26, 1942, from rating curve extended above 650 second-feet; maximum gage height, 5.10 feet May 10, 1937; minimum daily discharge, 3.6 second-feet Dec. 8, 1939 (discharge measurement) and Mar. 13, 1940, but may have been less during periods of no record. Remarks.- Records good except those for periods of ice effect or no gage-height record, which are fair. One small diversion and several small reservoirs above station for irrigation.

Rating tables, water year 1943-44, except periods of Ice effect (gage height, In feet, and discharge, in second-feet) Oct. 1 to Nov. 20 Apr. 21 to Sept. 30 0.9 4.2 0.8 4.2 1.5 3.1 2SO 1.0 6.2 .9 5.6 1.7 41 3.4 3S5 1.1 8.5 1.0 7.6 1.9 60 3.8 560 1.2 12 1.1 10 2.2 96 4.4 860 1.3 15 1.2 13 2.5 140 1.3 17 2.8 200 Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 8.3 10 _ 21 452 109 30 22 2 7.6 b9.2 - 22 324 106 29 21 3 6.7 b!2 - 22 265 103 24 18 4 6.2 bll - 24 2OO 122 23 18 5 6.2 10 - 39 200 91 22 IS 6 6.2 9.7 _ 76 242 77 22 16 7 9.7 10 - 92 280 70 23 15 8 6.4 9.4 - 106 292 62 26 15 9 6.0 b7.0 - 130 397 57 28 16 10 6.0 bS.O - 136 461 62 26 15 160' - 11 6.S b7.8 _ 425 59 25 12- 12 7.6 »7.8 - 182 320 56 24 11 13 *6.9 8.3 - 242 292 51 a24 9.3 14 9.7 7.8 - 310 289 49 a24 8.8 15 10 7.8 - 393 268 48 a24 7.4 _ AO1 fi 10 S.O 488 248 47 a23 7.0 9.7 7.6 - 328 208 45 a23 7.2 17 - 18 9.4 7.4 230 202 42 a25 7.2 11 6.7 - 235 210 42 31 7,2 19 ~ 20 8.8 6.7 \ 265 218 47 29 6.8 21 12 _ 12 301 208 44 27 6.0 22 12 - 12 357 133 42 26 6.0 23 11 « 12 474 174 41 26 6.0 24 9.7 _ 13 456 153 45 26 5.5 25 8.3 - 13 461 145 43 27 5.5 26 10 " 15 369 138 39 28 5.6 27 11 21 283 132 34 25 5.8 13 _ 22 324 128 32 24 5.8 29 14 18 357 120 30 26 5.8 _ 18 338 113 29 27 6.0 30 12 " ~ 31 11 - 397 29 26 -

Month fooWays « "*« Minimum Mean acre-feetRunoff in

October...... 282 . 6 14 6.0 9.12 561 November 1-20...... 172.2 12 6.7 8.61 342 December...... Calendar year ' ...... - - - January...... _ February ...... _ _ _ March...... _ _ _ April El-30 ...... 156 22 12 15.6 309 May...... 7,618 488 21 246 15,110 June ...... 7,297 461 113 243 14,470 July...... 1,753 122 29 56.5 3,480 August ...... 793 31 22 25.6 1,570 September...... 315.9 ' 22 5.5 10.5 627 Water year ...... - - - * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on" basis of records for stations on nearby streams. b Stage-discharge relation affected by ice. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN HI

Surface Creek near Cedaredge, Colo. * Location.- Water-stage recorder, lat. 38°59', long. 107°51', in NWiNW£ sec. 12, T. 12 S., K. 94 W., 1 mile downstream from Caesar Creek and 8£ miles northeast of Cedaredge. Drainage area.- 28.5 square miles. Records available.- June 1939 to September 1944 (no winter records). Extremes.- Maximum discharge recorded during year, 490 second-feet May 23 (gagp height, is.4t> reet), from rating curve extended above 300 second-feet, but probably higher during period of no record; minimum daily, 6.0 second-feet Nov. 6. 7. 1939-44: Maximum discharge, 578 second-feet May 12, 1941 (gage height, 3.62 feet), from rating curve extended above 300 second-feet; minimum daily recorded, 5.8 second- feet Sept. 23, 1939, but probably less during period of no record. Remarks.- Records good except those for period of ice effect or no gage-height record, which are poor. Discharge regulated by many small reservoirs.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 16 11 _ 185 154 44 39 2 17 9.0 - 164 143 68 52 3 14 11 - 154 132 66 64 4 12 9.0 - 126 124 80 64 5 13 7.5 - 126 121 77 64 6 16 6.0 _ 130 108 87 65 7 16 6.0 - 134 88 83 65 8 ,16 6.0 _ 152 104 88 53 9 15 14 - 190 106 90 51 10 14 10 - 20S 110 78 49 11 14 9.0 _ 219 117 72 50 12 14 8.1 _ 205 132 57 4S 13 *15 - _ 198 132 5S 42 14 11 - - 190 132 60 38 15 10 ~ - 192 134 61 36 - 16 9.1 . 211 138 64 36 17 9.3 - - 269 136 64 37 18 9 - - 263 141 58 34 19 10 - - 214 185 60 33 20 11 - - 208 177 66 36 _ 21 12 _ 216 166 66 34 11 - - 208 130 66 27 22 - 23 10 260 242 106 68 26 12 - 190 230 97 72 31 24 - 25 13 216 195 92 77 32 12 - 219 187 87 60 26 26 - 27 b9.0 208 166 82 56 24 oo b!2 - 205 159 77 55 22 fcO 14 - 216 149 76 52 21 29 - 30 15 225 149 66 50 20 31 13 205 ~ 61 49 - Second Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 394.4 17 9.0 12.7 782 November 1-12 ...... 106.6 14 6.0 8.38 211 December...... - - Calendar year ...... - - - - - January ...... _ _ _ _ _ February...... - - - - March...... _ - _ - - April...... _ - _ _ _ May 23-31 ...... 1,944 260 190 216 3,860 June...... 5,641 269 126 188 11, 190 July...... 3,656 IBS 61 118 7,250 August ...... 2,052 90 44 66.2 4,070 September...... J, 219 65 20 4O,6 2,420 Water year ...... - - - - - * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Hote.- No gage-height rncord Oct. 89 to Nov. 12 (stage-discharge relation probably affected by ice during most "of period); discharge computed on basis of 1 discharge measurement, weather records and record for station at Cedaredge. Time baa is; Mountain war time. To convert war time to standard time, subtract 1 hour. 112 GUNNISON RIVER BASIN

Surface Creek at cedaredge, colo.

Location.- water-stage recorder*and concrete control, lat. 38°52', long. 107°55', in sec. 20, T. 13 S., R. 94 W., at Cedaredge. Drainage area.- 43 square miles. Records available.- May 1917 to September 1927 and October 1933 to September 1944 In reports or ueological Survey. May 1917 to September 1944 In reports of state engineer. Average discharge.- 27 years, 30.9 second-feet. Extremes.- Maximum discharge during year, 622 second-feet May 16 (gage height, 1.05 feet); minimum dally, 0.4 second-foot Nov. 25, 27. 1917-44: Maximum discharge, 1,190 second-feet May 13, 1941 (gage height, 2.50 feet), from rating curve extended above 640 second-feet; no flow Sept. 25, 1939, and practically no flow at times during some winters. Remarks.- Records good above 20 second-feet and fair below. FK>w regulated by many reservoirs. Water Is diverted Into Surface Creek Basin from nearby streams. Di­ versions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 12 7.2 bO.6 1.0 1.3 2.1 l.S 7.6 199 66 12 15 2 14 b6.4 b.8 1.3 1.4 2.2 1.6 8.2 186 63 20 16 3 13 7.2 bl.O 1.2 1.2 2.2 2.4 6.3 195 72 15 13 4 11 5.6 bl.2 1.0 1.3 2.1 3.4 5.6 171 70 12 20 5 11 4.4 bl.6 .6 1.4 2.0 4.4 12 159 65 7.6 27 6 11 3.3 1.8 1.0 1.4 1.8 3.7 40 156 66 11 23 7 10 3.3 1.3 77 163 61 10 26 8 7.2 b3.3 1.3 .3 1.4 1.7 4.7 97 173 65 14 16 9 6.7 b4.5 1.3 .8 1.6 2.0 4.0 133 217 60 16 13 10 6.7 5.0 1.2 1.0 1.6 2.3 2.S 139 190 61 14 13 11 2.2 3.1 132 190 60 11 13 12 6.7 3.9 1.0 1.1 1.3 2.4 4.7 208 156 68 4.7 14 13 »6.7 3.3 1.1 1.0 1.5 2.7 4.0 263 152 65 4.0 12 14 6.1 2.3 1.2 1.0 1.7 2.4 3.1 217 143 60 6.3 14 15 6.7 2.0 1.3 1.0 1.8 2.3 3.1 190 136 55 10 14 16 6.7 2.2 1.3 1.1 1.9 2.2 2.4 378 130 54 S.9 14 17 6.7 2.0 1.3 1.1 1.7 2.6 1.6 2S5 136 50 7.6 7.6 18 6.7 2.6 1.3 1.1 1.9 2.4 1.4 182 127 50 4.0 6.3 19 9.0 2.0 1.4 1.1 2.1 2.7 1.6 167 97 56 4.4 4.7 20 9.7 2.0 1.5 1.1 2.2 2.3 1.6 204 S7 73 7.0 4.7 21 9.0 1.1 1.5 1.2 i.e 2.0 1.3 212 93 68 7.6 5.0 22 9.7 2.0 1.4 1.2 1.3 2.0 1.6 230 97 55 7.6 7.0 23 6.4 .7 1.4 1.3 2.0 2.3 1.4 263 109 43 7.0 8.2 24 7.2 i.e 1.3 1.3 2.0 2.6 2.1 280 102 34 14 3.9 25 6.4 .4 1.3 1.4 1.7 2.5 2.4 246 97 29 14 6.2 8.2' 26 6.1 .6 1.3 1.3 1.6 2.4 2.8 212 91 24 12 6.1 .4 1.1 1.2 1.7 2.1 5.0 171 ' 83 27 12 8.2 27 8.9 28 11 .5 1.1 1.2 1.9 i.e 124 75 24 16 8.2 29 12 .6 1.0 1.2 2.0 1.5 5.6 133 72 23 18 8.9 30 11 .7 1.2 1.3 1.6 5.6 143 73 20 19 8.9 31 8.4 1.1 1.2 i.e 152 17 21 Sepond- Runoff in Month foot-days -axiau. Minimum Mean acre-feet

Octo 271.0 14 6.1 8.74 538 Nove '86.4 7.2 .4 2.68 171 DeceBber...... 38.2 1.8 .6 1.23 76 Calendar year 1943 6,565.9 125 .2 16.0 13,010 Janu ary 34.3 1.4 .6 1.11 63 Febr 47.8 2.2 1.2 1.65 95 Marc 66.9 2.7 1.5 2.16 133 Apri 1...... 96.8 8.9 1.3 3.23 192 May 4,972.7 378 5.6 160 9,860 June 4,065 217 72 136 8,060 July 1,604 73 17 51.7 3,180 Augu St...... 347.7 21 4.0 11.2 690 September ...... 373.0 28 4.7 12.4 740 ffater year 1943-44 ...... 12,003.8 373 .4 32.8 23.SOO » Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Note.- No gage-height record Nov. 26-30, Dec. 9 to Bar. 25 (stage-discharge relation probably affected by Ice during most of period); discharge computed on basis of 3 disc"scharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtra GUNNISON RIVER BASIN 113

Surface Creek at Eckert, Colo.

Location.- Water-stage recorder, lat. 38°50'. long. 107°58', In SEi sec. 14, T. 14 S., R. 9b W., 0.7 mile southwest of Eckert and 2$ miles upstream from mouth. Prior to Sept. 11, 1944, staff gage at same site and datum. Drainage area.- 55 square miles. Records available.- April 1942 to September 1944. Extremes.- 1942: Maximum discharge observed during period April to September, 185 second- rest my 23 (gage height, 2.86 feet); minimum dally, 0.4 second-feet May 17. 1942-43: Maximum discharge observed during water year, 156 second-feet June 2 (gage height, 2.70 feet); minimum dally, 0.2 second-foot Mar. 2, 31, Apr. 1, 2. 1943-44: Maximum discharge observed during water year, 466 second-feet May 15 (gage height, 4.06 feet), from rating curve extended above 150 second-feet; minimum dally, 0.3 second-foot Mar. 23 to Apr. 2, Apr. 12-14, 19-27, Aug. 7-9, 11, 13. Remarks.- Records good Mar. 6 to July 25, 1944, and fair for other periods, Many diver- slons above station for Irrigation.

Diacharge, In second-feet, 1942-44 1942 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5.6 22 S.6 2.5 4.6 1.2 2 4.3 21 6.5 2.5 9.4 1.2 3 IS 21 5.3 2.5 6.5 2.2 4 30 17 5.1 2.5 5.6 4.4 5 36 25 16 2.5 3.2 4.4 6 2S 15 27 2.5 3.0 3.S 7 22 56 26 ZZ 3.0 4.3 8 36 90 12 9.S 3.0 4.3 9 45 107 9.4 3.3 1.7 4.S 10 58 132 13 2.5 .S 5.6 11 74 130 15 2.5 .S 7.8 12 113 65 11 2.0 2.4 4.3 13 US 12 6 5 1.7 1.2 3.0 14 167 1 8 5 6 1.2 1.2 2.7 15 163 1.3 2.5 16 146 7 3 8 1.7 1.5 2.7 17 126 4 3 6 2.7 1.6 2.7 18 '6493 1 2 4 8 3.S 1.5 3.0 19 14 4 6 2.1 1.5 2.7 20 59 53 4 6 1.0 IS 2.5 21 85 10O 4 6 .S 8.6 1.6 22 106 84 4 8 3.3 9.0 1.2 23 151 77 4 6 1.7 5.6 1.2 24 86 40 4 6 1.2 4.8 1.2 25 63 40 3 0 4.6 4.1 1.2 56 30 2.7 £OOft 3 0 3.S 1.2 27 36 34 2 7 1.2 3.6 1.1 28 33 17 2 6 1.2 2.4 1.1 30 4.6 2 5 2.0 1.8 1.2 29 zn ou 22 2.4 2 5 2.5 1.6 1.2 31 2.7 ~ 3.0 1.6 ~ 114 GUNNISON RIVER BASIN

Discharge, In second-feet, of Surface Creek at Eckert, Oolo., 1942-44 Continued 1942-43 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July " Aug. Sept. 1 1.2 0.7 0.9 0.7 0.6 0.3 0.2 6.3 4.1 2.4 0.7 1.7 2 1.2 .7 .8 .7 .6 .2 .2 10 75 1.7 5.3 2.0 4 .8 .7 .8 .7 .6 .4 .9 11 7.4 2.2 2.6 .7 5 .8 .7 .8 .7 .6 .7 2.7 15 2.6 2.0 2.5 .7 6 .7 .7 .8 .7 .6 .7 13 4.6 2.4 1.1 4.6 .7 7 .7 .8 .7 .7 .6 .7 2.6 4.6 3.3 .8 6.3 .7 2.5 4.8 .7 9 .7 .8 .8 .7 .6 .4 .7 2.6 3.2 .e 1.3 .9

11 .7 .8 .8 .7 .6 .4 .3 6.3 3.2 2.9 l.E 1.2 13 1.2 .3 .3 4.6 3.8 1.2 1.2

18 .8 .8 .7 .6 .6 .3 31 3.6 3.6 .7 7.0 .7 19 .7 .8 .7 .7 .6 .3 9.8 2.1 1.1 .7 12 .7 S.I 21 .7 .8 .9 .7 .6 .3 20 1.4 1.3 .7 .7 .7 22 .7 .8 .9 .7 .6 .3 12 2.1 2.4 .7 .6 .7 ?3 .8 .8 .9 .7 .6 .3 11 3.0 2.1 .7 .6 .7 24 .9 .8 .8 .7 .6 .3 20 2.7. 1.2 1.2 .7 .7 25 1.0 .8 .7 .6 .6 .3 14 1.7 .9 .9 .7 .7

27 .7 .8 .7 .6 .3 .3 5.3 3.2 .7 .7 .6 2.2 ?R .7 .8 .7 .6 .3 1.2 15 4.1 .7 .7 .6 1.3 .8 .8 .7 .6 _ 1.6 12 19 .9 .7 1.4 .7 30 .7 .8 .7 .6 - 1.6 17 5.6 7.0 .7 6.8 .7 31 .7 - .7 .6 - .2 " 2.6 ~ .9 9.0 ~

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.7 1.1 l.l 0.9 0.8 1.4 0.3 14 29 0.8 0.4 1.4 2 .6 1.1 1.2 .9 .9 1.4 .3 8.8 20 1.3 5.9 11 .6 1.1 1.2 .9 1.4 1.4 .6 5.2 73 2.0 1.2 1.8 4I .6 1.1 1.1 .9 1.1 1.4 3.0 4.6 77 4.0 .8 1.6 5 .6 1.1 1.2 .8 .9 1.2 2.4 5.9 80 1.6 .5 1.3 6 .6 1.1 1.2 .8 1.1 .6 2.4 34 83 1.6 .4 1.6 7 .6 1.1 1.2 .8 .8 .6 1.7 74 102 2.0 .3 1.3 8 .8 1.1 1.2 .8 .8 .6 1.1 86 132 10 .3 2.0 9 .7 2.6 1.4 .9 .9 .6 .6 112 155 8.8 .3 1.8 10 .6 1.4 1.2 .9 .9 .6 .6 60 176 7.4 .4 1.1 11 .9 1.4 1.2 .9 .9 .6 .4 102 226 7.7 .3 .8 12 .8 1.2 1.1 .9 .9 .7 .3 236 109 7.7 .4 .8 13 .8 .8 .9 .9 1.2 .7 .3 236 102 6.9 .3 .8 14 .8 .8 1.1 .9 1.4 .6 .3 313 116 7.7 .7 1.3 15 .8 .8 1.1 .9 1.6 .6 .4 332 127 4.8 .6 2.1 16 .8 .8 .9 .9 1.6 .6 .4 306 5? 3.8 .8 1.2 17 .8 .8 1.1 .9 1.2 .5 .4 155 21 5.9 .9 1.1 18 .8 .8 1.1 .9 1.6 .4 .4 47 8.8 7.4 .9 1.2 19 .9 .8 .9 1.2 1.7 .6 .3 43 3.3 10 .9 1.3 20 .9 .8 .9 1.4 1.8 .6 - .3 46 1.8 12 1.2 1.3 21 .9 .8 .9 1.2 1.1 .6 .3 96 1.3 8.8 1.6 1.3 22 .9 1.2 .9 1.2 .9 .5 .3 126 3.3 4.8 1.7 1.3 23 .9 .9 .9 1.4 . ! ! .3 .3 158 7.7 4.0 1.7 1.1 24 .9 .8 .9 1.7 .8 .3 .3 186 1.6 2.6 3.3 1.1 25 .9 .8 .9 .9 .8 .3 .3 89 1.3 3.0 2.2 1.3 26 .9 .8 .9 .9 1.4 .3 .3 36 5.6 2.2 .9 1.4 27 .9 .8 .9 .8 1.1 .3 .3 8.2 4.0 2.1 .8 1.4 28 .9 .8 .9 .8 1.1 .3 10 8.8 1.1 1.4 4.2 1.6 29 1.1 .8 .9 .8 1.3 .3 2.7 7.7 .9 .7 5.6 1.7 30 1.4 1.3 .9 .8 - .3 3.3 17 .8 .5 3.4 1.4 31 1.1 - .9 .8 - .3 - 36 - .4 1.8 - GUNNISON RIVER BASIN

Monthly discharge, in second-feet, of Surface Greek at Eckert, Colo., 1942-44 Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

_ _ _ _ March...... _ _ _ _ _ 2,073.9 167 May...... 227.7 27 July...... 96,8 22 .8 3.12 118.4 18 .8 82.3 7.8 1.1 2.74 163 The period...... - - _ - 7,570

November...... 78 * Calendar year 1948 ...... - _ _ _ 20 5 March...... g April...... 448 May...... 147 3 4 75 July...... 91 9 12 98 '

Water year 1942-43 ...... 807.2 75 .2 2.21 1,600 25.5 1.4 .6 .82 51 30.8 2.6 .8 1.03 61 December...... 32.2 1.4 , .9 1.04 j 64 Calendar year!943 ...... 819.9 75 .2 2.25 1,630 29.7 1.7 .8 .96 59 66 1.4 .3 .63 39 April...... 34.6 10 .3 1.15 69 May...... 332 4.6 96.4 5,930 1,726.5 226 .8 57.6 3,420 143.9 12 .4 4.64 285 44.7 5.9 .3 1.44 89 September ...... 50.4 11 .8 1.68 1OO Water year 1943-44 ...... 5,160.1 332 .3 14.1 10,230 Time baaia: Mountain war bime. To convert war time to standard time, subtract 1 hour. 116 GUNNISON RIVER BASIN

Ward Creek near Cedaredge, Oolo.

Location Staff gage, lat. 38°55', long. 107°59', In NEi sec. 14, T. 13 S., R. 95 W., If miles upstream from Riser Creek and 3i miles northwest of Cedaredge. Drainage area.- 19 square miles. Records available.- April 1942 to September 1944. Extremes.- Jtolmum discharge observed.during year, 80 second-feet May 16 (gage height, 1.60 feet), from rating curve extended above 50 second-feet; minimum daily, 0.1 second- foot most of year. 1943-44: Jfexlmum discharge observed, 90 second-feet Apr. 12, 1942 (gage height, 2.10 feet), from rating curve extended above 30 second-feet; no flow at times. Remarks.- Records fair except those for period of no gage-height record, which are poor. Gage read twice daily. Many diversions and small storage reservoirs above station for Irrigation.

Discharge. In second-feet, water year October 1943 tc September 1944 Day Oct. Ncv. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 10 36 1.0 0.2 0.2 2 .1 .1 .1 .1 .1 .1 .1 6.7 30 1.0 .2 .2 3 .1 .1 .1 .1 .1 .1 .1 3.2 43 1.2 .2 .2 .8 4.7 37 1.1 .2 .2 5 .1 .1 .1 .1 .1 .1 1.4 17 37 1.0 .2 .2 6 .1 .1 .1 .1 .1 .1 .9 31 34 1.0 .3 .3 7 1.0 36 33 1.0 .5 .3 8 44 48 1.1 .7 1.2 9 49 62 1.0 1.1 1.1 10 41 62 1.0 .4 .9 11 .1 .1 .1 .1 .1 .1 .5 50 57 1.0 .3 .9 12 .1 .1 .1 .1 .1 .1 .2 53 53 1.2 .2 1.5 13 54 45 1.1 .2 1.7 14 52 43 1.0 .2 2.4 15 .1 .1 .1 .1 .1 .1 .1 60 39 .9 .2 2.0 16 72 32 .9 .2 1.2 17 53 28 .8 .2 .3 18 46 27 .S .2 .3 19 39 25 .8 .4 .2 20 .1 .1 .1 .1 .1 .1 .1 36 18 .9 .2 .2 21 .1 .1 .1 .1 .1 .1 .1 40 13 .8 .2 .2 22 .1 .1 .1 .1 .1 .1 .1 47 7.1 .5 .2 .2 23 .1 .1 .1 .1 .1 .1 .4 51 5.4 .5 .2 .2 24 .1 .1 .1 .1 .1 .1 .4 50 3.2 .3 .5 .2 25 .1 .1 .1 .1 .1 .1 '4 45 3.2 .2 .3 .2 26 .1 .1 .1 .1 .1 .1 .1 43 4.7 .2 .2 .2 27 .1 .1 .1 .1 .1 .1 .1 42 3.4 .2 .2 .2 28 .1 .1 .1 .1 .1 .1 14 47 2.0 .2 .2 .3 29 .1 .1 .1 .1 .1 .1 6.9 49 1.5 .3 .2 .2 30 .1 .1 .1 .1 .1 7.9 40 1.2 .5 .3 .2 31 .1 .1 .1 .1 40 .2 .2 Seccnd- Runoff in Month f cot-days Maximum Minimum Mean acre-feet Octc 3.1 0.1 0.1 0.10 6.1 Neve 3.0 .1 .1 .10 6.0 Dacegiber...... 3.1 .1 .1 .10 6.1 Calendar year 1943 229.6 12 .0 .63 456 Janu ary 3.1 .1 .1 .10 6.1 Febr 2.9 .1 .1 .10 5.S Hare b...... 3.1 .1 .1 .10 6.1 Apri 36.9 14 .1 1.23 75 May. 1,251.6 72 5.2 40.4 2,480 June S33.7 62 1.2 27.8 1,650 July 23.7 1.2 .2 .76 47 Augu 9.0 1.1 .2 .29 ie September...... 17.6 2.4 .2 .59 35 Water year 1945-44 ...... 2,190.8 72 .1 5.99 4,340 Hote.- Ho gage-height record July 1-19; discharge computed on oasis of records for stations on nearby streams. Tlae basis; Mountain war tine. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 117

Riser Creek near Cedaredge, Colo.

Location.- Staff gage, lat. 38°56', long. 107°57', In SEJ sec. 12, T. 13 S., R. 95 W., 400 reet upstream from Cottonwood Creek and 3 miles northwest of Cedaredge. Drainage area.- 12.9 square miles. Records available.- April 1942 to September 1944. Extremes.- Maximum discharge observed during year, 51 second-feet June 16 (gage height, 6.44 feet), from rating curve extended above 3 second-feet by paralleling curve defined to 40 second-feet; minimum dally, 0.4 second-foot Oct. 1. 1942-44: Maximum discharge observed, that of June 16, 1944; minimum dally, 0.4 second-foot Sept. 29, 30, Oct. 1, 1943. Remarks.- Records poor. Gage read twice dally, Many diversions and small storage reservoirs above station for Irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Au6. Sept. 1 0.4 2.6 1.1 0.7 o.e 1.0 1.9 2.5 5.4 2,0 2.3 1.5 2 .5 2.6 1.1 .7 .8 1.1 1.8 2.3 5.8 1.5 2.3 1.5 3 .5 2.6 1.2 .8 .8 1.1 1.8 2.2 5.8 1.8 1.9 1.6 4 ,7 2.6 1.2 .7 .8 1.0 2.0 2.2 4,2 1.7 1.1 1.1

fi .8 2,6 1.2 .7 .8 1.0 2.2 2.8 4.4 1.3 1.0 1.8 7 .9 2.5 1.1 .8 1.0 1.0 1.9 2.2 9.4 1.5 .8 2.3 n .8 2.0 1.1 .7 1.0 1.0 1.9 2.1 IS 1.5 .7 2.5 « 1.0 2.0 1.1 .S .9 1.1 2.1 7.9 18 1.2 .7 1.8 10 1.3 2.0 1.0 .7 .9 1.1 2.0 3.5 22 1.2 .7 1.8 11 2.0 2.0 1.0 .7 .S 1.4 2.1 12 23 1.2 .7 2.6 12 2.8 2.0 1.0 .8 .9 1.2 2.2 18 27 1.5 .6 2.8 13 2.6 2.1 1.0 .7 .9 1.3 2.3 27 32 1.2 .6 .7 14 2.6 2.1 1.0 .7 .9 1.5 2.5 29 2S 1.1 .6 .6 15 2.5 2.1 .9 .8 .9 1.4 2.5 33 34 1.0 .7 .5 2.5 2.0 1.0 .7 .9 1.3 2.6 27 50 .9 .6 .5 17 2.5 2.0 .8 .8 .9 1.4 2.8 15 33 .9 .7 .7 in 2.6 2.1 .8 .8 .9 1.4 2.7 9.1 18 .9 .7 .6 1Q 3.1 2.1 .8 .8 .9 1.4 2.8 7.4 16 .8 .8 .7 20 3.0 2.1 .9 .8 .9 1.4 2.7 6.6 IS .8 1.5 .5 2.7 1.9 .8 .7 1.0 1.4 2.6 7.6 3 1.5 1.8 .5 22 2.8 2.0 .8 .7 1.0 1.4 2.6 9.4 1.9 2.3 1.5 .6 2.8 1.8 .8 .7 1.0 1.5 2.6 10 1.4 3.1 1.9 .6 2.8 1.7 .8 .8 1.0 1.6 2.6 7.1 1.6 3.3 1.9 .8 25 2.8 1.6 .8 .7 1.0 1.5 2.6 5.4 2.3 3.1 1.4 .8

Oft 2.7 1.5 .8 .7 1.0 1.4 2.5 4.6 8.6 3.1 1.1 .7 2.7 1.3 .7 .8 1.0 1,5 2.3 6.2 6.2 3.0 .9 .9 28 2.7 1.3 .7 .S 1.0 1.5 3.4 6.4 4.8 3.1 1.0 ,7 2.7 1.3 .8 .8 1.0 1.5 3.1 6.9 2.6 3.4 1.2 .6 2.7 1.3 .8 .8 - 1.6 2.7 7.1 3.1 2.5 1.5 .6 31 2.7 .8 .7 " 1.8 6.4 ~ 1.4 1.4 ~ Seccnd- Runoff in Month foct-days Maximum Minimum Mean acre-feet

Deceaber...... 29.1 1,2 .7 .94 58 Calendar year 1944 ...... 441.4 3.1 .4 1.21 876 January 23.1 .8 .7 .75 46 26.5 1.0 .8 .91 53 March...... 40.8 1.8 1.0 1.32 81 71.8 3.4 1.8 2.39 142 Ua<* 290.6 33 2.1 9.37 576 399.0 50 1.4 13.3 791 54.9 3.4 .8 1.77 35.3 2.3 .6 1.14 70 September...... 33.8 2.8 .5 1.13 67 Water year 1943-44 ...... 1,128.6 50 .4 3.08 2,840 Hote.- Ho gage-height record J^ily 1-19; discharge computed on basis of records for stations on nearoy streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 118 GUNNISON RIVER BASIN

Cottonwood Creek near Cedaredge, Colo.

Location.- Staff gage, lat. 38°56', long. 107°57', in SEi sec. 12, T. 13 S.,'R. 95 W., SOtTTeet upstream from mouth and 3 miles northwest of Cedaredge. Drainage area.- About 5 square miles. Records available.- April 1942 to September 1944. Extremes.- Maximum discharge observed during year, 38 second-feet May 15 (gage height, 5.b4 feet); no flow at times. 1942-44: Maximum discharge, 44 second-feet May 26, 1942 (gage'height, 5.76 feet); no flow at times each year. Remarks.- Records poor. Gage read twice daily. Many small diversions and small storage reservoirs above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

2 0 .2 b.l b.l .4 .8 1.1 1.3 6.9 1.2 0 6 Z 0 .3 b.l b.2 .5 .8 1.8 .9 13 1.1 .1 5 4 0 .4 b.l b.l .5 .6 2.2 .7 8.2 .9 .1 6 5 0 .4 b.l b.l .5 .7 2.6 .9 12 .7 .4 8

6I 0 .3 b.l .3 .6 .7 2,1 1.3 16 .6 .9 4 0 .3 .1 .3 .8 .7 1.9 2.9 9.6 .8 .8 1 8 0 .4 .2 .3 .7 .8 , 1.3 5.2 10 .9 .8 0 9 0 .4 .1 .3 .6 .8 1.4 7.3 13 .8 .7 0 10 0 .2 .2 .3 .6 .7 1.0 4.7 15 .7 .7 0 11 0 .1 .2 .3 b.5 .8 .3 8.8 16 .6 .5 0 12 0 *.l .2 .4 .6 .5 .3 9.4 14 .5 .3 0 13 0 .1 .2 .3 .6 .5 .4 14 12 .4 .2 0 14 0 .1 .2 .3 b.7 .6 .4 15 11 .3 .1 0 15 0 .1 b.2 b.3 .9 .3 .2 25 9.2 .2 .2 0 16 0 .1 .2 .3 1.0 .4 .4 29 9.0 .2 .2 0 17 0 .1 .2 .3 .B .3 1.0 22 8.0 .8 .3 0 18 0 .1 b.2 .3 .8 .4 1.0 9.2 6.2 .3 .4 0 19 0 .1 .3 .4 1.0 .3 1.0 6.7 5.5 .2 .2 0 20 0 .1 .3 .4 .9 .4 1.0 7.6 5.9 .2 .3 .1 21 0 .1 ^2 b.4 1.0 .4 .6 9.2 1.9 .3 .1 .1 22 0 .1 .2 *.5 .9 .4 .8 14 1.2 .4 0 .1 23 0 .1 .2 .6 1.0 .5 1.0 16 .4 .6 0 0 24 0 .1 .2 .6 1.0 .6 .7 17 .7 1.3 0 0 25 0 .2 .2 .5 .9 .5 .7 15 .7 1.0 0 0 26 0 .2 .2 .6 .9 .5 .7 18 1.6 1.0 0 .1 27 0 .1 b.l .6 1.0 .5 .6 16 2.3 1.0 0 0 28 0 b.l .2 .5 .9 .5 6.2 18 2.5 .6 0 -o 29 0 b.l .1 .5 1.0 .4 4.2 19 2.1 .4 0 .2 30 .2 b.l .2 .5 - .6 2.2 20 1.7 .1 .1 .2 31 .1 - .2 .5 - 1.1 - 12 - a .4 - Second- Runoff in Month foot-days Maximum Minimum Mean acre feet

0.3 0.2 0 0.01 0.6 5.2 .4 .1 10 December ...... 5.4 .3 .1 .17 11 Calendar year 1943 ...... 80.0 1.8 0 .22 158 11.2 .6 .1 .36 22 22.0 1.0 .4 .76 44 March...... 17. B 1.1 * .57 35 April...... 40.3 6.2 .£ 1.34 80 May...... 347.9 29 .7 11.2 690 223 T 4 16 .4 19.0 1.4 .1 .61 38 7.9 .9 0 .25 16 September...... 4.3 .8 0 .14 8.5 Water year 1943-44 ...... 704.7 29 0 1.93 1,400 * Winter discharge measurement made on this day. b Stage-discharge relation affected lay ice. Note_._- No gage-height record July 1-19; discharge computed on basis of records for stations .earby streams. Time basis; Hountain war time. To convert war time to standard time, subtract 1 hour. GUNNISQN RIVER BASIN 119

Youngs Creek near Cedaredge, Colo.

Location.- Staff gage, lat. 38°55', long. 107°57', in SWi sec. 18, T. 13 S., R. 94 W., tnree-elghths of a mile upstream from mouth and 2 miles northwest of Cedaredge. Drainage area.- 19 square miles. Records available.- April 1942 to September 1944. Extremes.- Maximum discharge observed during year, 83 second-feet May 15 (gage height fj.iiU feet); no flow Aug. 17, 18, 20, 24, 27-29. 1942-44: Maximum discharge observed, that of May 15, 1944; no flow at times. Remarks.- Records poor. Many diversions and small storage reservoirs above station for irrigatlon.

Discharge, In second-feat, water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept.

1 0.1 0.2 0.2 0.2 0.2 0.2 0.3 5.1 S.8 0.5 0.2 0.1 2 .1 .2 .2 .3 .2 .2 .3 3.6 8.3 .5 .2 .1 3 .1 .2 .2 .2 .2 .2 .4 3.1 8.0 .6 .2 .1 4 g 4 9 S .1 .2 .2 .1 .2 .2 .5 7.S 5.6 .5 .2 .1 6 .1 .2 .2 .1 .2 .2 .5 13 11 .5 .2 .1 7 .1 .2 .2 .2 .2 .2 .5 19 22 .5 .1 .1 8 .1 .1 .2 .1 .2 .2 .6 17 17 .5 .1 .1 9 .1 .2 .2 .1 .2 .3 .7 16 35 .5 .1 .1 10 .1 .2 .2 .1 .2 .3 .4 24 41 .5 .1 .1 11 .2 .2 .2 .2 .2 .4 .4 34 40 .5 .1 .1 12 .3 .2 .2 .2 .2 .3 1.3 40 38 .6 .1 .1 13 * 1.1 .2 .2 .1 .2 .3 1.5 45 32 .6 .1 .1 14 .5 ,2 .2 .1 .2 .3 .7 47 24 .5 .1 .1 15 .1 ,2 .2 .2 .2 .3 1.1 66 18 .4 .2 .1 16 .1 .2 .2 .2 .2 .3 1.4 67 6.9 .4 .1 .1 17 .1 .2 .2 . .2 .2 .4 1.2 40 4.2 .3 0 .1 18 .1 .2 .2 .2 .1 .3 .8 30 1.4 .3 0 .1 19 .1 .2 .2 .2 .2 .3 .5 30 1.5 .3 .1 .1 20 .1 .2 .2 .2 .2 .3 .5 33 1.4 .3 0 .1 21 .1 .2 .2 .2 .2 .3 .5 34 2.6 .2 .1 .1 22 .1 .2 .2 .2 .2 .3 .5 38 2.2 .2 ;i .1 23 .1 .2 .2 .2 .2 .3 .5 45 1.0 .2 .1 .1 24 .1 .2 .2 .2 .2 .4 1.2 45 .8 .3 0 .1 25 .1 .2 .2 .2 .2 .3 2.1 34 .S .3 .1 .1 26 .1 .2 .2 .2 .2 .3 2.4 17 .8 .3 .1 .1 27 .1 .2 .2 .2 .2 .3 2.5 12 .8 l.S 0 .1 28 .1 .2 .1 .2 .2 .3 9.5 13 .8 .2 0 .1 29 .3 .2 .2 .2 .2 .4 4.6 13 .7 .2 0 .1 30 .3 .2 .2 .2 . .4 5.7 11 .5 .2 .1 .1 31 .2 - .2 .2 - .4 - 11 - .3 .1 -

Second Runoff in Month foot-days Maximum' Minimum Mean acre-feet

December...... 6.1 .2 .1 .20 12 Calendar year 1943 ...... 137.0 5.9 0 .38 272

9 1 May...... g nrj

September...... 3.0 .1 .1 .10 6.0 Water year 1943-44 ...... 1,258.3 67 0 3.44 2,490 Mote.- Ho gage-height record July 1-19; discharge computed on basis of records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 120 GUNNISON RIVER BASIN

Uncompahgre River at Colona, Colo.

Location.- Water-stage recorder, lat. 38°19'5011 , long. 107°46'4011 , In NWi sec. 17, T. 47 N., H. 8 W., a quarter of a mile east of Colona. Datum of gage Is 6,321.80 feet above mean sea level, datum of 1929. Drainage area.- 437 square miles. Records available.- March 1935 to September 1944. April 1903 to June 1906, April 1917 to November 1934, at site 3 miles upstream. Average discharge.- 28 years (1904-5, 1917-44), 294 second-feet. Extremes.- Maximum discharge during year, 2,240 second-feet June 21 (gage height, 3.82 reet); minimum da'lly, 61 second-feet Feb. 10. 1903-6, 1917-44; Maximum dally discharge, 4,080 second-feet June 13, 14, 1921; minimum dally, 16 second-feet Sept. 3, 1918. Remarks.- Records good except those for period of ice effect, which are fair. Diversions above station for Irrigation. Cooperation.- Gage heights and most discharge measurements furnished by Uncompahgre vaiiey water Users Association.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 97 133 95 76 69 82 102 271 1,380 1,470 372 110 97 121 108 71 68 90 92 250 1,290 1,570 327 118 95 133 95 76 65 86 124 209 1,270 1,760 284 115 133 110 74 69 80 167 180 914 1,470 254 108 130 115 68 »69 74 212 243 708 1,660 236 105 6 88 127 115 72 71 68 216 381 708 1,540 215 98 88 108 108 74 72 65 239 577 1,000 1,290 206 90 88 102 108 68 68 64 187 606 1,030 1,130 203 * 84 118 108 64 68 74 191 769 1,220 1,190 203 82 127 100 64 61 88 174 862 1,350 1,090 241 80 11 95 127 90 66 62 97 167 854 1,310 977 210 76 118 124 90 70 65 100 227 1,240 1,330 923 199 73 110 127 102 74 71 97 239 1,640 1,100 905 179 71 130 124 100 78 65 95 174 1,640 1,230 878 176 73 124 iei 86 79 72 71 154 1,940 1,310 748 164 80 16 118. 115 90 80 69 69 170 1,960 1,270 665 152 78 108 118 »86 80 71 86 15fe 1,580 923 679 146 76 102 1S1 88 »81 69 105 154 1,100 1,180 637 149 75 133 118 100 78 66 88 167 958 1,420 637 149 71 115 98 75 68 92 164 974 1,550 820 131 71 21 127 108 95 70 71 84 154 982 1,770 708 125 71 136 115 90 66 66 76 145 1,160 1,820 644 125 71 130 124 90 66 71 78 139 1,490 1,630 616 120 69 lie 88 68 71 92 170 1,440 1,770 732 134 69 124 118 76 69 72 105 170 1,210 1,620 693 170 69 26 121 105 78 69 69 97 154 1,120 1,780 616 149 73 118 86 82 71 66 82 194 1,010 1,550 567 131 76 121 95 71 71 66 76 405 1,050 1,720 542 128 76 139 95 76 69 71 68 340 1,360 1,660 506 118 75 142 92 88 69 - 80 318 1,480 1,540 464 115 71 136 - 86 69 - 102 - 1,410 420 110 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

1 AO

December...... 2,912 115 71 93.9 5,780 Calendar year 1943 ...... 87,142 1,070 64 239 172,800

April ...... 9° Hay 708

September...... 2,454 118 69 81.8 4,870 Water year 1943-44 ...... 131,304 1,960 61 359 260,400 » Winter discharge measurement made on this day. Hote.- Stage-discharge relation affected by ice Jan. 6-24. Time baalas Mountain war time. To convert war time to standard time, subtract 1 hour. GUNNISON RIVER BASIN 121

Uncompahgre River at Delta, Colo.

Location.- Chain gage, lat. 38°45', long. 108°05', In SWi sec. 13, T. 15 8., R. 96 W., at west edge of Delta, li miles upstream from mouth. Datum of gage Is 4,929.92 feet above mean sea. level, datum of 1929. Drainage area.- 1,110 square miles. Records available.- April 1924 to September 1931 t September 1938 to September 1944. April J.9U3 to October 1923 at site 3t miles upstream. Extremes.- Maximum discharge observed during year, 3,340 second-feet May 16 (gage height, o.iu reet), from rating curve extended above 1,700 second-feet; minimum dally, 69 second-feet Jan. 14. 1903-31, 1938-44: Maximum discharge recorded, 3,730 second-feet May 5, 1941 (gage height, 5.90 feet), from rating curve extended above 1,900 second-feet; minimum dally, 7 second-feet July 10-15, 17, 21, 24-28, 1910. Remarks.- Records fair. Gage read twice daily. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to Sept amber 1944 Day Oct. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 317 450 125 79 102 90 209 840 435 988 206 173 2 322 455 134 a74 112 79 216 410 706 1,060 186 166 3 SSS 533 130 a90 121 96 238 420 1,520 S80 160 170 4 see 572 116 112 a!25 94 250 350 1,170 832 150 160 5 317 455 130 100 a!28 S2 317 298 502 952 147 170 6 322 425 163 104 alSO 81 307 440 618 880 139 166 7 326 380 176 92 a!25 70 410 961 898 713 160 179 8 326 380 alSO a90 allS 98 385 1,380 1,420 430 147 a!70 9 341 400 160 121 alOS 212 410 1,070 1,120 520 163 a!65 10 0360 370 156 116 a98 212 341 1,400 1,110 800 163 170 11 a440 350 160 alOO 104 238 254 1,360 997 a600 155 a!75 12 578 331 alSO 114 alOS 258 312 1,670 1,010 460 160 182 13 572 322 a!60 90 alOS .262 322 1,830 624 aSOO 152 206 14 450 380 a!50 69 108 322 326 2,120 618 a260 150 SSS 15 440 445 a!25 a76 allO 206 271 2,900 67S a330 179 209 16 400 289 a!22 - a76 66 84 360 3,240 657 3O7 170 199 17 365 195 a!2o 70 aB6 76 559 2,500 445 a290 160 226 18 370 179 121 70 9S 155 226 1,030 370 246 173 219 19 420 1S2 142 alOS aB6 307 139 533 824 246 192 223 20 460 173 142 150 87 360 202 776 1,030 585 166 230 21 450 155 142 121 110 360 303 496 1,230 540 163 266 22 420 155 144 116 106 298 322 a740 678 514 170 284 23 472 144 a!32 132 96 312 312 1,060 692 .514 173 284 24 472 127 127 139 96 331 303 934 832 644 166 294 25 478 al22 114 127 114 346 294 566 925 776 182 307 26 450 132 alls allS 104 346 258 664 1,060 792 173 322 27 a400 134 a98 106 119 326 246 566 1,260 650 160 341 28 a380 116 a 82 106 90 289 898 526 1,150 598 176 350 29 415 114 a76 108 89 266 1,210 720 1,040 445 176 360 - 30 435 125 79 108 262 ' 979 1,020 872 375 173 370 31 450 - 86 121 - 271 744 - 336 173 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 12,592 578 317 406 24,980 November...... 8,590 572 114 286 17,040 December...... 4,045 176 76 130 8,020 Calendar year 1943 ...... 105,354 1,650 54 289 209,000 January ...... 3,197 150 69 103 6,340 February...... 3,065 130 86 106 6,080 March...... 6,789 360 70 219 13,470 April ...... 11,179 1,210 139 373 22,170 May...... 33,564 3,240 298 1,083 66,570 June ...... 26,511 1,520 370 884 52,580 July...... 17,863 1,060 246 576 35,430 August ...... 5,163 206 139 167 10,240 September...... 6,959 370 160 232 13,800 Water year 1943-44 ...... 139,517 3,240 6S 381 276,700 a Ho gage-height record; discharge computed on basis of unpublished record for station below Garnet Canal head gate and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 9 122 OUNNISON RIVER BASIN

Roubideau Creek at mouth, near Delta, Colo.

Location.- Water-stage recorder, lat. 38°44', long. 108°09', in sec. 19, T. 15 S., R. 96 W., half a mile upstream from mouth and 5 miles west of Delta. Datum of gage Is 4,869.20 feet above sea level, datum of 1929. Drainage area.- 245 square miles. Records available.- March 1939 to September 1944. Extremes.- Maxlmun discharge during year, 1,820 second-feet May 15 (gage height, 6.04 reet;; minimum daily, 28 second-feet Feb. 14, Mar. 2, 3. 1939-44: Maximum discharge, 2,180 second-feet May 13, 1941 (gage height, 6.40 feet), from rating curve extended above 1,600 second-feet; minimum dally, 17 second- feet Mar. 20, 1940. Remarks.- Records good except those for period of Ice effect, which are fair. Part of discharge is return flow from irrigated lands under lower end of Ironstone Canal. A few small diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 144 122 63 50 36 29 48 126 676 114 60 50 138 118 63 49 37 28 47 146 576 112 58 48 134 92 60 49 37 28 49 142 734 100 62 50 144 92 " 64 49 35 30 56 124 522 96 62 48 138 116 67 41 35 32 63 124 487 98 56 44 6 134 106 66 43 34 32 69 176 459 82 64 45 126 106 59 43 34 29 60 313 508 64 62 45 128 102 57 b40 35 29 64 436 566 56 69 48 136 80 55 b36 39 40 67 580 476 61 74 50 134 84 55 b37 35 44 74 760 484 60 80 53 11 142 115 47 b42 31 43 74 788 433 60 69 62 126 111 48 b45 32 40 76 1,000 382 67 72 87 102 94 54 b48 31 44 120 1,180 310 66 67 102 100 80 56 b48 28 56 118 1,360 270 60 67 85 87 78 57 b48 30 66 104 1,560 255 68 69 108 16 87 74 60 b47 30 49 122 1,470 250 70 70 *¥ 92 73 53 »b47 34 38 164 1,320 231 74 67 iS 90 67 55 b45 34 30 148 904 211 69 70 150 118 62 57 39 31 45 120 720 189 62 78 154 120 63 72 38 33 48 146 924 178 74 78 154 21 111 66 73 38 34 47 164 952 168 106 72 148 111 66 64 38 31 60 162 1,070 156 91 74 132 118 73 54 39 31 63 154 1,180 148 124 70 130 24 118 69 52 41 34 59 146 1,180 136 154 66 126 109 67 52 42 36 52 138 1,040 144 164 85 128 26 116 64 54 41 33 50 116 900 156 150 87 140 115 54 50 37 32 47 102 700 132 126 87 142 107 56 47 37 30 49 180 668 142 108 78 144 109 62 47 38 30 - 64 180 752 132 93 74 146 30 118 60 «49 36 _ 60 130 716 128 93 69 138 120 - 46 «36 - 53 - 696 - 74 58 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 3,672

December ...... 1,756 73 46 56.6 3,480 Calendar year 1943 ...... 44,706 772 3C 122 88,660 1,307 42.2 March...... 26 April ...... May...... 124

56 September ...... 3,040 154 44 101 6,030 Water year 1943-44 ...... 56,460 1,560 28 154 112,000 « Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Time basis; Mountain war time. To convert war time to ubtract 1 hour. GUNNISON RIVER BASIN 123

Kahnah Creek near Whitewater, Colo.

Location.- Water-stage recorder and concrete control, lat. 38°59', long. 108°14', In sec. 34, T. 12 S., R. 97 W., a quarter of a mile downstream from intake of pipe line for Grand Junction water supply and 17 miles east of Whitewater. Drainage area.- 55.0 square miles. Records available.- October 1917 to September 1921 and October 1933 to September 1944 in reports or Geological Survey. October 1917 to September 1921 and August 1922 to September 1944 in reports of State engineer. Average discharge (including flow diverted by pipe line above station).- 26 years, 42.6 secona-reet. Extremes (combined flow).- Maximum discharge during year, 757 second-feet June 9; mlnl- mum daily, s.u secona-feet Jan. 9, 13. 1917-21, 1922-44: Maximum discharge, 1,630 second-feet June 6, 1921 (gage height, 4.5 feet, site and datum then in use), from rating curve extended above 700 second- feet; minimum daily, 4.3 second-feet Dec. 19, 1939. Remarks.- Records fair. Figures of flow diverted for Grand Junction water supply lootained from several readings made each day on Cippoletti weir), and Raber ditch furnished by State engineer and added to monthly discharge to give total flow of stream. Records of combined flow good below 10 second-feet and fair above. Regu­ lation by a few small reservoirs above station.

Discharge, in seccnd-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 23 6.4 6.4 3.9 4 .1 4 .3 3 .2 14 548 61 26 23 2 20 5.S 6.4 3.S 4.2 4.3 3 .2 14 434 57 18 22 3 20 8.2 6.2 3.9 4 .2 -4 .3 «4.0 11 342 55 13 12 4 19 7.0 6.0 4.0 4 .2 «4 .4 6 .4 10 276 55 11 15 5 18 6.4 5.8 3.9 4 .2 4 .3 8 .2 12 296 50 11 16 6 17 7.6 * 6.4 3.8 4 .3 4 .3 8 .8 29 347 45 10 17 7 17 7.4 6.4 3.8 4 .4 4 .2 10 42 316 40 14 23 8 15 7.2 6.4 3.9 4 .7 4 .2 7 .6 48 358 37 17 23 9 11 8.0 5.8 4.1 5 .2 4 .2 4 .0 61 490 35 19 22 10 6.4 S.2 5.8 4.2 5 .2 4 .3 3.5 64 456 31 24 19 11 6.4 «6.2 5.8 4.2 5.0 4 .4 5 .8 76 380 29 24 18 12 7.6 7.6 6.8 4.2 5.0 4 .6 7 .0 87 286 34 23 17 13 7.0 7.0 6.0 4.1 5 .2~ 4 .7 5 .8 107 286 31 24 16 14 6.4 7'.0 5.8 4.2 *5 .2 4 .7 .8 136 258 23 45 10 15 6.4 5.8 5.6 4.4 5 .0 4 .9 3 .8 161 258 28 48 8.2 16 6.4 5.8 5.4 4.5 4 .9 5 .0 3 .5 196 228 27 46 8.2 17 5.8 5.8 5.2 4.4 4 .8 5 .0 3 .2 168 172 28 42 7.0 18 5.8 5.8 5.0 4.4 5 .0 5 .2 3 .2 136 165 29 42 5.2 19 *13 5.8 4.8 4.0 5 .0 5 .2 3 .5 129 185 31 42 8.2 20 8.2 5.8 4.6 3.8 5 .0 5 .2 3 .8 142 182 37 43 7.6 21 7.6 5.8 4.0 3.9 4 .8 4 .0 3.5 175 165 32 40 7.6 22 7.6 7.0 4.0 3.8 4 .6 3 .5 3 .5 241 144 32 40 7.0 23 7.6 7.6 4.0 z.n 4 .6 3 .2 5 .2 326 120 31 40 7.0 24 6.4 6.4 4.0 «3.7 4 .4 3 .5 5.8 402 109 29 45 7.0 25 7.0 5.8 4.0 3.7 4.3 3 .8 4.6 423 100 35 45 6.4 28 5.8 5.8 4.0 3.8 4 .3 3 .8 4 .6 468 109 34 45 5.2 27 6.4 6.4 4.0 3.9 4 .3 3 .8 7.6 445 89 29 45 4.0 28 7.0 6.0 3.9 4.0 4 .3 3 .8 12 496 74 28 34 7.6 29 9.4 6.0 3.9 3.9 4 .2 3 .6 12 583 64 28 34 7.6 30 8.8 6.0 3.9 3.9 _ 3 .4 11 577 62 27 31 7.0 31 8.2 - 3.9 4.0 - 3 .3 - 571 - 26 26 - Adjusted for Obs erved diversion Diversions Month Second- Mean Maximum Minimum Mean Runoff In (acre-feet )t Runoff In second- foot-days acre-feet acre-feet feet ) . October...... 321. 2 23 5.8 10.4 637 410 1,050 17.0 November...... 199.6 8.2 5.8 6.65 396 11.8 December...... 159.2 6.4 3.9 5.14 316 284 600 9.75 Calendar year 1943 . . 8,212.9 286 3.8 22.5 16,290 4,870 21,160 29.2 January...... 123.8 4.5 3. 7 3.99 246 262 508 8*86 February...... 134.6 5.2 4.1 4.64 267 262 529 March ...... 131.4 5.2 3' a2 4.24 261 284 545 8.S5 » ! » April...... 172.1 12 10' 205*5» 74 341 440 J.O" i nay.Unv ...... 6,350 583 12,600 661 13,260 216 June ...... 7,299 548 62 243 14,480 715 15,200 255 July...... 1 099 61 26 35.5 2,180 585 2 ,760 45.0 August ...... '...... 967 48 10 31 2 1,920 589 2,510 40.8 September...... 363.8 23 4.0 12! i 722 519 1,240 20.8 Water year 1943-44 . . 17,320.7 583 3.2 47.3 34,370 5,320 39,690 54.7 * Winter discharge measurement made on this day. t Diversion by Brand Junction water works Intake and Raber Hlghllne ditch. Note..- Stage-discharge relation affected by Ice Nov. 7-10, 28-30, Dec. 1-6, 11-19, Dec. 25 to Jan. Ho gage-height record Jan. 2 to Apr. 1 (stage-discharge relation affected by Ice during most of.period); discharge computed on basis of 3 discharge measurements and weather records. Tims basis: Mountain war time. To convert war time to standard tine, subtract 1 hour. 184 DOLORES RIVER BASIN

Dolores River at Dolores, Colo.

Location.- Water-stage recorder, lat. 37°28', long. 108°30', in sec. 9, T. 37 N., R. ib w., at Dolores, a quarter of a mile upstream from Lost Canyon Creek. Datum of gage is 6,924.91 feet above mean sea level, datum of 1929. Drainage area.- 556 equare miles. Records available.- June J895 to October 1903 and August 1910 to December 19J£ (at site Just dowristream from Lost Canyon Creek), May 1922 to September 1927 (monthly dis­ charge), and October 1933 to September 1944 in reports of Geological Survey. June 189S to October 1903, August 1910 to December 1912, and April 1922 to September 1944 In reports of State engineer. Average discharge.- 23 years (1921-44), 496 second-feet. Extremes.- Maximum discharge during year, 5,670 second-feet May 16 (gage height, 6.90 reet); minimum daily, 40 second-feet Feb. 20, Mar. 6. 1895-1903, 1910-12, 1922-44: Maximum discharge, 10^000 second-feet Oct. 5, 1911 (gage height, 10.2 feet, site and datum then in use), from rating curve extended above 2,800 second-feet; minimum dally, 8 second-feet Aug. 16, 1896. Remarks.- Records excellent except those for Dec. 1 to Hay 16, which are fair. Diver- sions above station for Irrigation.

Discharge, in second-feet, water yesr October 1943 to September 1944 Day Oot. NOV. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 123 104 58 46 47 48 149 742 3,360 1,860 315 184 2 133 97 74 46 45 49 144 796 3,220 1,670 322 160 3 121 97 66 50 43 54 186 660 2,900 1,S30 316 178 4 116 104 77 49 45 50 279 698 2,350 1,700 310 172 5 112 »104 88 46 47 44 400 967 2,220 1,520 301 168 6 112 99 85 48 46 40 614 1,480 2,350 1,420 318 164 7 114 79 82 61 44 42 602 1,900 2,810 1,250 315 168 8 114 63 70 50 47 44 560 2,060 2,820. 1,070 316 166 9 110 67 71 49 48 48 550 2,310 3,100 1,010 342 164 10 108 97 72 50 47 50 448 2,420 3,470 920 348 160 11 112 67 70 54 45 53 532 2,430 3,500 838 310 160 12 142 85 64 62 42 57 692 2,790 3,060 696 297 160 13 127 84 65 47 47 59 654 3,390 2,680 636 306 212 14 118 82 62 48 * 45 54 476 3,830 2,820 578 899 228 15 121 76 54 49 46 45 388 4,560 2,730 627 293 232 16 116 74 44 60 46 42 408 4,960 2,790 486 228 236 17 110 76 45 51 47 70 336 4,020 2,290 .450 202 236 18 B8 SO 48 61 45 90 295 2,840 2,350 424 200 234 19 114 77 53 62 42 90 298 2,610 2,620 407 216 230 20 129 76 66 52 40 90 363 2,760 2,730 624 230 230 21 104 70 54 50 43 80 322 2,720 2,840 470 204 228 22 104 B8 52 49 44 90 273 3,160 2,610 398 196 224 23 101 67 52 50 46 96 325 3,570 2,420 361 208 124 24 97 90 50 48 47 109 416 3,880 2,580 379 226 64 25 92 79 45 47 49 107 436 3,430 2,580 373 271 77 26 95 71 50 46 49 106 388 2,840 2,700 325 222 90 27 95 47 48 50 48 61 488 2,550 a2,690 299 194 99 28 97 58 49 52 48 66 726 2,640 a2,150 282 204 127 29 142 74 45 61 *47 61 607 3,110 a2,030 308 200 116 30 142 66 45 47 _ a65 618 3,180 2,050 322 196 97 31 123 - 47 46 - alOO - 3,300 - 310 190 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

3 4CO December...... 1,643 88 44 59,5 3,660 Calendar year 1943 ...... 165,928 3,510 36 455 389,100 January . Ad **

April...... 725 144 May...... July September...... 6,108 236 64 170 10,130 lister year 1943-44 ...... 225,951 4,960 40 617 448.200 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of 1 discharge measurement and records for station near McPhee. Hote.- Ho gage-height record Dec. e to Mar. 16 (stage-discharge-relation affected by ice most of period); discharge computed on basis of 6 discharge measurements and weather records. Time basis; Mountain war time. To convert war tine to standard time, subtract 1 hour. DOLORES RIVER BASIN 125

Dolores River near McPhee, Colo.

Location.- Water-stage recorder, lat. 37°34', long. 108°34', in HEi sec. 12, T. 38 N., R. ie W., 0.8 mile downstream from Beaver Creek and 4i miles northwest of McPhee. Datum of gage is 6,666.45 feet abqve mean sea level, unadjusted. Drainage area.- 793 square miles. Records avallaMe.- October 1938 to September 1944. Extremes.- Maximum discharge during year, 7,540 second-feet May 16 (gage height, 7.07 reet), from rating curve extended above 5,900 second-feet: minimum daily, 2.7 second- feet Nov. 14-16, 21. - 1938-44: Maximum discharge, 8,650 second-feet Oct. 13, 1941 (gage height, 7.58 feet), from rating curve extended above 5,900 second-feet: minimum daily, 2.1 second- feet July 20, 22, 1939, Aug. 5, 1940. Remarks.- Records good except those below 60 second-feet and those for periods of no gage-neight Tecord, which are fair. Montezuma Canal diverts water just below sta­ tion at Dolores to irrigate 30,000 acres in Montezuma Valley.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOV. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 4.B 7.4 3.6 57 56 40 130 1,880 3,180 1,460 14 7.6 2 4.B 5.6 3.B 56 54 43 130 1,890 3,050 1,300 13 7.0 3 4.B 5.0 13 57 53 46 167 1,440 2,870 1,400 S.2 7.0 4 4.S 4.6 44 31 56 37 332 1,630 2,350 1,360 5.8 7.0 5 4.6 4.4 95 27 57 34 577 2,140 2,100 1,180 s.e 6.4 6 6.0 4.2 90 26 54 32 1,020 2,900 2,110 1,100 s.s 6.0 7 6.4 3.6 90 27 «51 35 1,150 3,300 2,530 938 9.4 5.6 5.4 3.6 »74 27 54 39 1,120 2,590 8 3,240 732 13'9.4 5.5 9 5.4 3.6 61 27 59 46 1,040 3,580 2,790 660 5.3 10 5.0 3.6 67 31 69 48 770 3,920 3,200 580 28 5.1

11 5.8 4.0 50 37 67 52 B70 3,970 3,220 484 14 4.S 12 7.8 3.0 42 38 64 69 1,230 4,260 2,800 333 6.4 4.6 13 10 2.B 60 38 58 62 1,200 6,010 2,380 225 7.6 h4.6 14 7.0 2.7 58 37 49 69 940 5,300 2,480 169 7.0 4.6 15 6.6 2.7 61 38 56 50 eoo 6,960 2,370 94 B.B 4.6

16 6.6 2.7 43 39 56 «48 880 6,160 2,450 56 9.4 4.6 17 6.6 2.B b47 , *4O 58 54 750 5,050 1,920 35 9.4 4.6 18 6.6 2.B 52 45 60 B5 640 3,260 1,920 27 10 4.6 19 9.0 2.B 57 55 58 92 660 3,110 2,070 26 12 4.6 20 19 2.B 62 56 54 109 eoo 3,240 2,310 135 21 4.6

21 9.6 2.7 65 55 55 92 730 3,050 2,440 72 12 4.6 22 7.B 3.-2 «63 53 56 92 640 3,450 2,230 27 10 4.6 23 7.0 4.2 63 54 56 82 780 3,940 2,020 19 11 4.6 24 6.2 4.0 62 53 39 87 860 4,290 2,160 19 12 4.6 25 6.2 3.6 58 51 41 98 965 3,690 2,180 20 35 4.6

26 e.B 3.4 60 54 41 B7 B66 2,840 2,270 14 34 4.8 27 5.e 3.4 61 57 40 77 1,120 2,560 2,160 11 13 6.0 28 5.8 3.6 62 60 40 64 1,760 2,620 1,750 13 12 16 29 6.6 3.4 59 57 *39 52 1,310 3,060 1,600 15 11 h4.6 30 25 3.6 57 54 _ 50 1,630 3,110 1,640 13 9.4 4.6 31 12 - 58 53 - 67 - 3,170 - 9.4 8.2 -

Seoond- Runoff in Month foot-daye Maximum Minimum Mean acre-feet

n't October...... 231.0 «CO 4.6 7.45 458 November...... 110.2 7.4 2.7 3.67 2ia Ddoefliber 1,741.4 »OOR 3.6 56.2 3,450 Calendaf year 1943 ...... 132, 319. B 3,050 2.7 363 262,400

January...... 1,390 60 26 44.8 2,760 February...... 1,620 60 52.4 3,010 «Q Baron...... 1,936 109 O«C 62.5 5,840 April...... 25 , 7B7 1,760 130 860 51,150 lbi>ay...... 106,940 6,160 1,440 3,450 212,100 June ...... 71,140 ' 5,220 1,600 2,371 141,100 July...... 12,525.4 1,460 9.4 404 24,840 August...... 391.6 35 5.8 J.tf*D19 A 777 September...... 166.7 15 4.6 5.56 331 Water year 1943-44 ...... 225,879.3 6,160 2.7 612 4A,000 * Winter discharge measurement made on this day. D Stage-discharge relation affected by lee. h Computed from staff-gage readings. Mote.- Ho gage-height record Dec. 11, Dec. 18 to liar. 16, Mar. 28, 29 (stage-discharge relation affected by lee part of period); discharge computed on oasis of 5 discharge measurements and weather records. Ho gage-height record Apr. 10-24, Sept. 6-30; discharge computed on basis of 3 dis­ charge measurements and records for station at Dolores and diversions between the two stations. Time basis; Mountain war tine. To convert war time to standard time, subtract 1 hour. 126 DOLORES RIVER BASIN

Dolores River at Gateway, Colo.

Location.- Water-stage recorder, lat. 38°41', long. 108°58', in SWi sec. 15, T. 51 N., R. 19 W., 0.3 mile northwest of Gateway, 0.3 mile downstream from West Creek, and 8 miles upstream from Colorado-Utah State line. Datum of gage is 4,547.44 feet above mean sea level, unadjusted. Drainage area.- 4,350 square miles. Records available.- March 1937 to September 1944. Extremes.- Maximum discharge during year, 12,700 second-feet May 16 (gage height, 9.64 reetj; minimum daily, 52 second-feet Sept. 24, 25. 1937-44: Maximum discharge, 15,400 second-feet May 14, 1941 (gage height, 11.33 feet, revised, present site); minimum daily, 45 second-feet Aug. 18, 1940. Remarks.- Records good. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 215 195 130 128 188 220 228 3,850 6,080 2,930 425 114 Z 200 180 136 104 200 286 248 4,880 5,9SO 2,730 380 114 6 190 162 140 134 200 370 298 4,420 6,150 2,590 346 106 4 182 150 122 138 195 362 435 3,100 6,360 2,560 321 100 5 17S 152 122 126 190 314 592 3,270 5,370 2,490 297 97 6 172 150 152 142 212 245 948 5,490 4,460 2,240 270 94 7 166 150 168 142 215 '192208 1,450 7,780 4,320 1,960 258 90 8 162 152 150 152 242 , 2,020 8,530 4,880 1,510 249 S7 9 157 150 148 138 277 182 2,100 9,020 4,860 1,320 255 83 10 152 148 152 118 286 182 2,030 9,600 5,110 1,230 288 80 11 148 162 195 114 240 208 1,510 9,440 5,700 1,160 297 77 12 144 155 175 130 172 248 1,840 10,000 4,710 1,090 261 76 13 144 152 178 134 178 274 2,930 10,500 5,010 984 234 74 14 142 152 190 134 182 33S 2,970 11,200 4,410 906 219 76 15 142 152 180 122 162 435 1,980 11,700 4,410 82S 210 95 16 140 150 158 130 190 380 1,510 11,900 4,190 775 22S 90 17 138 146 160 146 195 298 1,480 11,100 4.0SO 720 196 69 18 138 146 144 155 208 262 1,340 9,440 3,460 705 185 67 19 142 148 148 168 210 259 1,180 7,370 3,410 690 190 66 20 232 148 170 170 ISO 262 1,200 7,100 3,650 710 332 64 21 248 148 190 172 192 292 1,300 7.0SO 4,010 840 204 63 2?. 242 158 182 165 210 301 1,240 7,060 4,170 740 175 63 23 192 170 208 182 215 289 1,120 7,520 3,900 660 163 55 24 ISO 190 205 230 198 259 1,090 7, SOO 3,730 670 151 52 25 175 165 202 222 235 271 1,580 7,820 3,S90 660 165 52 26 180 -160 185 1S2 268 283 1,850 7,160 3,970 646 213 55 27 178 152 190 182 248 274 1,730 6,150 4,060 556 210 59 28 155 138 152 170 228 265 2,830 5,540 3,870 489 165 66 29 175 124 124 166 210 245 4,390 5,560 3,260 465 147 108 30 185 128 150 178 _ 228 3,440 5,980 3,020 461 134 120 31 198 - 152 185 - 218 - 6,170 - 453 126 - Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet 5,394 248 138 174 10,700 4,633 195 124 154 9,190 December...... 5,058 208 122 163 10,030 Calendar year 1943 ...... 300,293 5,380 110 823 595,700 4,761 230 104 154 9,440 6,126 2S6 162 211 12,150 March...... 8,450 435 182 273 16,760 April ...... '...... 48,859 4,390 228 1,629 96,910 May 233,530 11,900 3,100 7,533 463,200 134,480 6,360 3,020 4,483 266,700 July...... 36,768 2,930 453 1,186 72,930 7,294 425 126 235 14,470 September...... 2,412 120 52 80.4 4,780 Water year 1943-44 ...... 497,765 11,900 52 1,360 987,300 Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. DOLORES RIVER BASIN 127

West Fork Dolores River near Stoner, Colo.

Location.- Water-stage recorder, lat. 37°39 I , long. 10S°19', In NEi sec. 18, T. 39 N., R. 13 W., three-Quarters of a mile downstream from Cottonwood Creek, 4 miles north of Stoner, and 4{ miles upstream from mouth. Drainage area.- 160 square miles. Records available.- March 1941 to September 1944 (dlscontlnusd). Extremes.- Maximum dlschargs during year, 2,120 second-feet May 15 (gage height, 4.25 reet), from rating curve extended above 1,200 second-feet; minimum dally, 10 second- feet Nov. 29, Dec. 24, 27, but may have been less during period of ice effect. 1941-44: Maximum discharge, 2,790 second-feet May 13, 1941 (gags height, 4.25 fset), from rating curve extended above 1,200 second-feet: minimum dally, that of Nov. 29, Dec. 24, 27, 1943. Remarks.- Records fair. Diversions above station for Irrigation, Plow partly regu- latea by Ground Hog Reservoir (capacity, 21,710 acre-feet).

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Bay June July Aug. Sept. 1 61 28 23 15 46 122 1,080 456 194 148 2 66 30 11 16 45 144 1,000 480 804 150 3 63 30 19 17 52 128 970 440 201 146 4 58 28 11 18 62 126 842 412 201 140 5 58 26 17 15 74 164 802 380 822 138 6 61 26 13 13 90 254 842 384 227 142 7 58 20 13 14 105 425 950 332 224 140 8 61 20 15 15 100 554 877 300 229 134 9 63 30 11 16 96 678 950 272 243 140 10 56 30 12 17 80 769 1,050 246 229 138 11 58 26 15 IS *100 838 9SO 232 206 134 12 68 18 14 20 135 1,030 S50 204 206 140 13 63 al6 15 IS 133 1,160 S86 1S7 229 204 14 67 al4 16 17 100 1,300 802 171 227 199 15 56 a!3 14 15 88 1,560 756 158 216 196 13 > 15 16 53 all 15 14 88 1,600 735 146 152 201 17 44 al2 80 80 71 1,330 68S 136 144 199 18 22 IS 20 2S 68 940 598 134 142 194 19 34 a!3 27 (») 88 72 S59 628 806'129 150 194 20 28 alS SB 88 78 895 670 148 199 21 24 all 17 85 72 S68 700 144 138 199 22 26 821 19 87 64 1,020 610 130 152 189 23 '2426 81 14 30 64 1,190 570 119 171 56 24 19 10 32 71 1,330 616 127 171 28 25 18 15 13 32 73 1,220 634 127 180 39 26 22 15 11 32 76 950 688 108 142 32 27 24 15 10 26 96 S77 616 104 146 37 28 22 25 15 22 135 931 545 105 154 41 29 32 10 14 80 119 1,050 505 169 154 39 30 a32 19 13 - 25 106 1,110 530 164 154 34 31 aSO - 12 ~ 33 - 1,180 - 169 150 -

Second- Runoff in Month fee t-days Maximum Minimum Mean acre-feet October...... 1,368 68 18 44.1 2,710 November...... 587 30 10 19.6 1,160 December ...... 471 27 10 15.2 934 Calendar year '1943 ...... 45,781 942 10 125 90,800 J&nu&ry 403 13 799 February...... 435 _ _ 15 863 March...... 666 33 13 21.5 1,320 April ...... 2,564 135 45 85.5 5,090 toy...... '...... 86,548 1,600 122 856 59,650 June...... 22,910 1,080 505 764 45,440 July...... 6,S11 456 104 820 , 13,510 August ...... 7 ...... 5,706 243 13S 184 11,320 September...... 3,950 204 28 132 7,S30 Water year 1943-44 ...... 72,413 1,600 - 198 143,600 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of weather records. Note.- Stage-discharge relation affected by Ice Dec. 26, Dec. 30 to Apr. 6 (no gage-height record Jan. 15 to Mar. 9); discharge computed on basis of 2 discharge measurements and weather records. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. 128 DOLORES RIVER BASIN

San Miguel River near Placervllle, Colo.

Location.- Water-stage recorder, lat. 38°02 1 J long. 108°07', In SEi aec. 30, T. 44 N., R. 11 W., 100 feet downstream from Specie Creek and 3 miles northwest of Placervllle. Drainage area.- 308 square miles. Records available.- January to September 1909 (monthly discharge) at Saltado Ranch 3 miles downstream, October 1909 to November 1912 (monthly discharge) at alte 2| miles upstream (excludes flow of Specie Creek), a^d torch 1942 to September 1944 In reports of Geologi­ cal Survey. January 1909 to November 1912, April 1930 to September 1934 (above Specie Creek; no winter records), and torch 1942 to September 1944 In reports of State engi­ neer. Extremes.- Maximum discharge during, year, 3.060 second-feet May 14 (gage height, 5.10 reet), from rating curve extended above 1,100 second-feet; minimum dally, 58 second- feet Jan. 27. 1909-12, 1930-34, 1942-44: Maximum discharge, 10,000 second-feet Sept. 5, 1909 (failure of Trout and Park Lake Dams); minimum dally, 50 second-feet Dec. 21-25, 1911, but may have been less during period of Ice effect. Remarks.- Records good except those for period of Ice effect, which are fair. Diversions above station for Irrigation. Slight regulation by Lake Hope and Trout Lake of Western Colorado Power Co. (combined capacity, 5,040 acre-feet).

Discharge, in second-feet, water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 117 106 84 79 67 72 75 220 1,160 1,160 359 139 2 113 92 88 72 65 74 74 225 1,140 1,080 338 135 3 113 96 74 b72 68 75 86 186 1,150 1,140 320 131 4 109 94 W5 b72 74 74 100 170 962 1,080 305 124 5 106 96 b76 72 65 72 120 212 848 1,080 290 124 6 106 96 SO b74 70 63 142 362 860 1,080 282 124 1 106 36 80 b72 65 " 68 ISO 590 96S 998 2S5 12O 8 104 82 80 63 70 72 142 734 974 896 285 115 9 100 90 32 b67 67 75 146 986 1,080 933 311 111 10 96 68 84 b69 68 75 126 1,050 1,200 654 £93 111 11 100 38 84 b71 65 75 148 1,120 1,250 S54 275 109 12 115 88 34 b70 74 77 20S 1,490 1,190 710 260 106 13 102 92 90 b67 72 79 210 1,630 1,120 674 248 104 14 106 90 SO b66 70 75 172 1,880 1,210 638 235 104 15 104 86 77 b74 74 67 137 1,800 1,160 566 228 100 16 102 -*84 77 b74 72 74 128 l.SEO 1,150 530 222 98 17 100 92 b72 *72 75 -75 120 1,480 986 572 212 96 18 102 90 b75 72 74 SO 109 1,200 1,050 578 212 92 19 131 88 b78 63 74 75 126 1,110 1,160 548 215 88 20 120 S3 b82 70 79 77 139 1,040 1,290 758 202 34 21 109 36 75 70 63 77 124 1,020 1,350 633 188 86 22 109 92 77 70 74 74 109 1,090 1,290 542 1S1 82 23 106 90 79 70 75 75 104 1,200 1,270 482 177 82 24 100 88 75 67 70 79 117 1,260 1,330 512 190 79 25 102 84 77 65 70 77 120 1,160 1,340 54S 220 88 26 104 80 75 59 72 70 115 1,050 1.420 476 133 96 27 98 72 , 74 58 63 68 139 1,020 1,320 . 440 170 133 28 104 80 70 65 68 63 245 1,040 1,210 435 164 124 29 124 88 74 65 70 67 205 1,130 1,180 430 155 113 30 120 SO 77 64 _ 63 188 1,180 1,220 430 150 106 31 109 ~ 74 62 - 74 - 1,160 - 406 146 Seoond- Runoff in Month foot-days Maxinun Mininun Mean ao re-feet October...... 3,337 131 96 108 6,620 November...... 2,652 106 72 88.4 5,260 December...... 2,429 90 70 7S.4 4,820 Calendar year 1943 ...... 83,560 605 70 229 165,700 January...... 2,136 79 58 68.9 4,240 February: ...... 2,043 79 65 70.4 4,050 March 2,276 SO 67 73.4 4,510 April ...... 4,124 245 74 137 8,180 May 31,615 1,880 170 1,020 62,710 June ...... 34,833 1,420 848 1,161 69,100 July...... 22,089 1,150 408 713 43,310 August ...... 7,301 359 146 236 14,480 September...... 3,204 139 79 107 6,360 Rater year 1943-44 ...... 118,044 1,380 58 323 234,100 * Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Time baala; Mountain war tine* To convert war time to standard time, aubtraot 1 hour. DOLORES RIVER BASIN 129 San Mlguel River at Naturtta, Colo. Location.- Water-stage recorder, lat. 38°13', long. 108°34', In SEiSWi sec. 19. T. 46 N., K. 15 w., at highway bridge in Naturlta and l.S miles downstream from Katurlta Creek. Datum of gage Is 5,392.85 feet above mean sea level, datum of 1929. Drainage area.- 1,080 square miles. records available.- October 1917 to September 1927, October 1940 to September 1944 In " reports of Geological Survey. April 1918 to September 1929, October 1940 to September 1944 In reports of State engineer. Average discharge.- 16 years, 438 second-feet. locrremes.- naxla discharge during year, 5,910 second-feet May 13 (gage height, 8.84 reet), from rating curve extended above 3,800 second-feet; minimum daily, 46 second- feet Sept. 25.' 1917-29, 1940-44: Maximum discharge, 7,100 second-feet Apr. 15, 1942 (gage height, 9.80 feet), from rating curve extended above 3,800 second-feet; minimum daily, 38 second-feet Aug. 31, 1918. Remarks.- Records excellent except those for period of ice effect or no gage-height record, which are poor. Diversions above station for irrigation.

Rating tables, water year 1943-44, except period of Ice effect (gage height, In feet, and discharge. In second-feet) (Shifting-control method used Oct. 1-50, Apr. 1-7) Oct. 1 to June 25 July 26 to Sept. SO 0.8 56 1.9 255 4.2 1,250 0.7 46 1.6 188 2,6 BOO 1.2 106 2.4 580 5.0 1,830 .9 66 1.9 260 3.4 880 1.6 170 5.0 630 5.3 2,080 1.5 12S 2.2 550 5.7 1,060

Discharge, in second-fset, water year October 1943 .to September 1944 Day Oct. NOT. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 90 114 86 78 76 106 133 1,080 1,390 1,050 334 80 Z S7 106 93 82 80 114 144 995 1,850 980 305 75 3 85 99 84 78 74 119 174 620 2,960 1,050 285 75 4. 79 102 81 76 86 115 250 492 1,980 960 265 70 6 81 103 88 74 82 107 553. 785 1,620 960 239 69 6 80 105 103 82 80 96 541 1,480 1,540 960 224 70 7 7S 99 91 78 82 88 565 2,030 1,420 880 217 70 8 79 100 91 74 86 S3 340 2,500 1,610 820 217 69 9 7S 100 95 72 90 98 365 2.780 1,500 860 250 66 10 74 109 95 76 84 109 325 2,800 1,750 820 271 65 11 79 105 84 82 76 119 360 5,050 1,790 740 234 65 12 85 103 85 80 78 125 500 5,260 1,600 680 210 62 13 86 105 96 76 80 151 550 4,140 1,460 620 195 62 14 78 106 90 76 84 156 460 4,080 1,550 580 181 65 IS 80 102 84 80 98 120 340 4,100 1,450 540 170 66 16 79 102 76 84 100 102 515 5,900 1,460 500 162 64 17 75 *100 66 «78 99 109 300 3,240 1,220 520 150 62 18 74 100 78 76 98 126 280 2,300 1,210 540 146 60 19 105 100 105 76 88 126 530 2,050 1,560 520 186 58 20 122 100 105 78 91 126 370 2,000 1,530 720 154 56 21 116 99 95 82 «98 126 340 1,920 1,610 680 155 53 22 107 103 91 84 98 110 300 2,140 1,510 600 150 50 23 105 114 91 84 95 109 280 2,570 1,450 550 118 48 100 109 86 80 100 24 * 114 510 2,500 1,480 470 120 47 25 99 107 74 100 117 350 2,230 1,300 500 170 46 26 99 102 82 72 99 119 530 1,960 1,400 444 152 47 27 98 68 75 72 99 105 560 1,680 1,250 416 125 51 28 98 79 74 74 96 102 1,150 1,650 1,150 388 112 55 29 110 84 75 78 95 98 1,050 1,870 1,050 388 102 58 30 126 87 82 80 - 103 960 1,890 1,100 410 98 60 31 122 " 75 78 ~ 114 - 1,910 - 385 88 Second- u»»n Runoff in Month foe t-days Maximum Minimum *ean acre-feet

October...... 2,854 126 74 92 ! 5*660 November...... 3,O30 114 79 101 6,010 December...... 2,672 105 66 86.2 5,300 Calendar year 1943 ...... 110,885 1,550 66 304 220,000

1717 Q A I7Qf\ January- ...... 2,416 84 72 » » . if %f IW February...... 2,592 100 74 89.4 5,140 arch...... 5,495 156 88 113 6,930 April...... , 12,225 1,150 135 403 24,250 May. j" _ ...... * 69,602 4,140 492 2,245 138,100 June ...... 44,810 2,060 1,050 1,494 88,880 July...... 20,551 1,050 585 662 40,720 August ...... 5,739 334 33 185 11,380 September...... 1,837 80 46 61.2 3,640 Water year 1943-44 ...... 171,803 4,140 46 469 340,800 * Winter discharge measurement made on this day. jrote..- Ho gage-height record Apr. 8-30, June 26 to July 25; discharge computed on basis of record for station at Placervllle. Stage-discharge relation affected by Ice Jan. 1, Jan. 3 to Feb. 15. Tl»e basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 130 DOLORES RIVER BASIN

Fall Creek near Fall Creek, Colo.

Location.- Water-stage recorder, lat. 37°58'', long. 108°01', In sec. 24, T. 43 N., R. 11 W., 2.7 miles upstream from mouth and 2.8 miles south of Fall Creek. Drainage area^- 33.5 square miles. Records available.- October 1942 to September 1944. Extremes.- Maximum discharge during year, 476 second-feet May 14 (gage height, 2.36 feet, rrom rioodmarks), from rating curve extsnded above 150 second-feet; minimum observed, 3.5 second-feet Feb. 21 (discharge measurement), but probably less during period of no gage-height record. 1942-44: Maximum and minimum discharges, those for 1944. Remarks.- Records poor. No diversion or regulation above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 9.S 7.8 6.S 24 158 152 31 9.4 Z 9.6 13 6.8 24 168 142 31 9.4 3 9.2 10 «7.0 24 162 140 28 9.2 4 9.0 9.4 7.4 22 136 134 27 9 £ 5 9*2 10 S.2 38 132 130 24 9.0 6 9»S 10 10 50 . 136 128 24 9.0 7 8.8 b9.2 10 60 152 115 24 9.0 8 S.4 b9.0 10 70 154 106 24 9.0 8.2 b9.6 10 77 162 106 31 9.0 10 S.2 blO 10 100 180 105 27 9.0 11 S.6 9.4 11 130 182 93 22 8.7 12 9.1 9.6 13 160 168 84 21 8.7 13 9.0 9.6 14 200 154 79 20 8.4 14 S.6 9.6 14 290 160 74 19 8.4 15 S.4 9.4 12 250 16O 7O IS 8.7 > 6.0 . 4.5 4.0 6.0 1CLQ S.2 *9.2 11 200 156 63 17 8.7 17 7.S 9.2 (») 10 170 134 61 16 8.4 18 S.4 9.2 10 150 134 58 17 8.1 19 9.4 9.2 11 140 148 64 IS 8.1 20 9.2 9.2 11 125 162 77 17 7.8 21 S.2 9.4 (»> 11 140 165 60 15 7.8 22 7.4 9.S 9.8 178 158 53 14 7.8 23 7.0 9.8 (»> 9.4 172 154 49 13 7.8 24 6.8 e'.49«2 9.6 160 168 56 12 7.8 25 7.4 10 150 170 50 14 8.4 26 «7.1 7.6 13 130 185 45 12 9.4 27 6'. 8 6.8 17 120 170 45 11 12 28 7.6 6.4 24 120 156 40 10 9.0 29 9.4 7.0 23 142 150 42 9.7 7.8 30 S.7 6.6 _ 21 152 156 38 9.7 - 7.2 S.7 - - ~ ~ 31 ' 166 35 9.6

Second- Runoff in Month foot-days Maximum 4 Minimum Mean ao re-feet

October...... 261.4 9.8 6.S 8.43 518 November...... 272.6 13 6.4 9.09 541 December...... 186.0 - - 6.0 369 Calendar year 1943 ...... 9,911.5 229 _ 27.2 19,660 January ...... 139.5 _ _ 4.5 277 February ...... 116.0 _ _ 4.0 230 March...... 186.0 _ _ 6.0 369 April...... 351.0 24 6.8 11.7 696 May...... 3,933 290 22 127 7,800 June ...... 4,.730 185 132 15S 9.380 July...... 2,492 153 35 SO. 4 4,940 August ...... 5S6.0 31 9.6 IS. 9 1,160 September ...... 26O.2 12 7.2 8.67 516 Water year 1943-44 ...... 13,513.7 290 - 36.9 26,800 * Winter discharge measurement made on thl s day. b Stage-discharge relation affected by ice. Note.- No gage-height record Oct. 1-18, 20-2S, NOT. 5, 6, NOT. 11 to May 21, Aug. 13 to Sept. 7j discharge computed on basis of S discharge measurements, Veather records, and records for San Miguel River near Placerville. Time basis; Mountain wartime. To convert war time to standard time, subtract 1 hour. DOLORES RIVER BASIN 131

Beaver Creek near Norwood, Colo.

Location.- Water-stage recorder, lat. 37°56', long. 108°10», In sec. 28, T. 43 N., R. J.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.6 5.3 27 225 34 1.5 0.3 2 1.5 5.3 29 204 38 1.4 .2 3 1.2 6.6 29 195 44 1.4 .2 4 1.5 5.3 26 138 26 1.2 .2 5 1.6 4.4 SO 141 25 1.0 .2 6 2.2 4.2 35 159 22 .9 .2 7 2.7 b4.8 50 180 19 .8 .2 8 2.7 b4.4 60 186 17 .8 .2 9 3.0 6.2 70 234 18 1.7 .1 10 2.7 10 «92 267 16 2.2 .1 11 3.7 9.4 no 255 14 1.6 .1 12 6.6 6.2 174 195 11 .9 .1 13 4.2 5.7 237 168 8.0 .8 .1 14 4.8 4.8 291 156 3.1 .6 .1 15 6.6 4.4 394 144 2.9 .5 .1 7 6 ' 5 7 > 13 18 5.7 «4.8 429 130 2«9 .6 .2 17 5.3 6.3 324 108 2.6 .5 .5 18 5.3 7.6 237 100 2.5 .6 1.2 19 10 S.2 243 98 2.6 1.0 1.1 20 6.2 S.2 240 108 4.5 1.4 1.3 21 4.4 8.2 291 112 2.9 .9 1.8 22 5.3 S.6 370 115 2.6 .5 1.5 23 4.4 S.6 426 92 2.4 .3 1.6 24 3.9 S.2 394 100 4.5 2.0 1.2 25 4.2 8.0 324 105 3.6 3.6 2.1 26 *4.2 7.6 246 125 2.6 1.8 2.0 27 4.4 7.4 210 90 2.6 1.3 4.1 28 4.S 7.4 204 53 2.4 .9 2.3 29 6.6 7.4 222 37 2.2 .7 2.0 30 6.2 7.4 - 234 38 1.9 .6 1.8 31 4.4 ~ " ~ 219 ~ 1.7 .5 ~ Second- Runoff in Month foot-days Maximum Minimum Mean ao re-feet October...... 131.9 10 1.2 4.25 £62 November...... 200.9 10 4.2 '6.70 398 December...... 217 7 430 Calendar year ~ ...... _ January...... 186 _ _ 6 369 February...... 145 _ _ 5 288 March ...... 217 _ _ 7 430 April...... 390 _ _ 13 774 May...... 6,267 429 26 £02 12,430 June ...... 4,258 267 37 142 8,450 July...... 343.5 44 1.7 11.0 679 August ...... 34.5 3.6 .3 1.11 bS September...... 27.1 4.1 .1 .90 54 Hater year 1943-44 ...... 12,416.9 429 - 33.9 24,630 * Winter discharge measurement made on this day. ' b Stage-discharge relation affected by ice. Note.- He gage-height record Nov. 17 to May 9 (stage-discharge relation affected by ioe during most of period); discharge computed on basis of weather records and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 132 DOLORES RIVER BASIN

Cottonwood Creek near Nucla, Colo.

Location.- Water-stage recorder, lat. 38°16', long. 108°22', In sec. 1, T. 46 N., R. 14 w., naif a mile upstream from North Fork and 10 miles east of Nucla. Drainage area.- 43 square miles. Records available.- May 1942 to September 1944 {no winter records 1942,1943). Extremes.- Maximum discharge during year, 244 second-feet May 12 (gage height, 4.18 feet), rrom rating curve extended above 75 second-feet; no flow at times during period of no gage-height record. 1942-44: Maximum discharge, that of May 12, 1944; no flow at times during periods of Ice effect. Remarks.- Records fair ex-cept those for periods of Ice effect or no gage-height record, wnicn are poor. A few small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.3 0.2 0.1 5B 26 1.7 0.5 0.2 2 .3 .2 .1 47 24 1.6 .5 .2 3 .3 .2 .1 27 32 1.8 .4 .8 4 .3 .2 .1 24 34 1.7 .4 .2 5 .3 .2 1.1 43 30 1.6 .4 .2 6 .3 .2 3.7 69 26 1.5 .4 .2 7 .3 .2 «3.9 6B 25 1.4 .3 .2 8 .3 .2 3.2 108 24 1.3 .3 .2 9 .3 .2 2.6 124 22 1.4 .4 .8 10 .3 .2 1.7 117 22 1.3 .3 .1 11 .3 .2 3.9 137 20 1.2 .3 .1 12 .3 .2 > 0.2 6.B 134 18 1.1 .3 .1 13 .3 .2 7.1 108 16 1.0 .3 .1 14 .3 .2 3.4 103 13 .9 .3 .1 15 .3 .2 2.4 86 12 .8 .3 .1 . 0.2 > 0.1 0.1 16 .3 .1 3.7 74 11 .7 .2 .1 17 .3 *.l 2.2 63 9.6 .6 .2 .1 18 .3 .1 i.e 43 8.3 .6 .2 .1 19 .3 .1 2.5 41 6.8 .7 .3 .1 20 .3 .1 3.4 41 s.o .8 .2 .1 21 .2 .1 1.9 45 3.1 .7 .8 .1 22 .2 .1 i 1.5 48 2.5 .6 .2 .1 23 .Z .1 .1 2.2 48 2.8 .6 .2 .1 24 .2 .1 .1 7.1 44 1.9 .7 .8 .1 25 .2 .1 .1 7.3 38 2.1 .7 .2 .2 26 .2 .1 .1 10 36 2.2 .6 .2 .£ 27 .2 .1 .1 16 31 2.0 .6 .2 .2 28 .2 .2 .1 32 30 1.9 .6 .2 .3 29 .2 .2 .1 18 26 1.7 .5 .2'.Z .3 30 .2 .2 _ .1 34 27 1.7 .5 .? SI .2 ~ - .1 26 ~ .5 .2 ~ Seocnd- Runoff in Month fcct-days Maximum Minimum Meaa acre-feet October...... 8.2 0.3 0.8 0.26 16 November ...... 4.8 .2 J. .16 9.5 December...... 6.2 .£ 12 Calendar year ...... - - - - January...... , ...... 3.1 .1 6,1 February...... 2.9 _ _ .1 5.8 March...... 5.3 _ _ .17 11 April...... 183.9 34 .1 6.13 sea May...... 1,901 137 24 61.3 3,770 June ...... 405.0 34 1.7 13.5 803 July...... 30.3 1.8 .5 .98 60 August...... :...... 8.7 .5 .2 .28 17 September...... 4.8 .3 .1 .16 9.5 Water year 1943-44 ...... 2,564.3 137 - 7.03 5,080 * Winter discharge measurement made on this day. Hpte.- Ho gage-height record June 22 to July 26} discharge computed on basis of records for nearby stations. Ho gage-height record Dec. 1 to Mar. 22 (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of weather records. \ Time basis; Hoiintain war time. To convert war time to standard time, subtract 1 hour. DOLORES RIVER BASIN 133

Naturita Creek near Norwood, Colo.

Location.- Water-stage recorder, lat. 37°58', long. 108°18', in SEi- sec. 20, T. 43 N., R. IS W., 500 feet downstream from East Fork and 11 miles south of Norwood. Drainage area.- 27.7 square miles. Records available.- October 1941 to September 1944 (no winter records). Extremes.- 1941-42: Maximum discharge during-water year, 205 second-feet May 27 (gage height, 2.54 feet); minimum daily, 0.2 second-foot Sept. 2, 10, 17-20, 28-30. 1942-43: Maximum discharge during water year, 312 second-feet Aug. 15 (gage height, 3.20 feet), from rating curve extended above 200 second-feet; minimum daily,0.3 secona- foot Oct. 1-6, Sept. 20, 23. 1943-44: Maximum discharge during water year, 337 second-feet May 16 (gage height, 3.36 feet), from rating curve extended above 200 second-feet; minimum daily, 0.1 second-foot Sept. 10-17, 21-24. Remarks.- Records fair except- those for periods of ice 'effect or no gage-height record, which are poor. Small diversions above station for irrigation.

Dlacharge, in second-feet, 1941-44 1941-42 Day Oct. MOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 4.0 12 14 96 1S4 S.6 2.2 0.3 2 S.6 12 18 100 114 S.8 3.0 .2 3 6.0 11 SO 94 102 S.4 2.8 .4 4 16 «9.9 20 100 93 s.s 2.4 .8 5 12 9.0 SO 110 89 s.s 2.1 .6 6 9.0 9.0 SO 112 76 S.2 2.0 .9 7 5.2 . 6.2 S4 124 59 3.0 1.9 .7 8 5.4 S.2 40 1S4 51 2.9 1.7 .5 9 5.0 8.2 54 142 46 2.8 1.6 .3 10 4.4 8.2 70 169 36 2.8 1.6 .2 11 4.4 8.2 85 160 27 2.7 1.9 1.5 12 IS 8.2 100 162 23 2.7 6.8 1.6 13 84 9.9 110 141 23 2.6 5.2 .9 14 54 8.2 160 124 22 2.7 2.7 .6 15 16 7.4 150 12S 22 2.7 2.0 .6 16 12 7.4 160 12S 20 2.7 1.6 .3 17 11 W.2 160 128 19 4.5 1.6 .2 18 9.9 D9.0 150 128 16 4.0 1.6 .2 19 9.0 b8.8 140 1SS 19 2.9 1.6 .2 20 9.0 W.2 ISO 144 17 S.O 1.6 .2 21 40 b7.4 150 160 IS S.O 1.6 .3 22 19 b8.6 160 168 25 S.O 1.4 .3 23 11 b8.2 170 166 SI 2.S 1.5 .3 24 14 *b8.1 160 178 22 2.8 2.0 .3 26 73 a8.4 140 174 7.2 2.6 2.1 .3 26 56 88.6 130 182 5.6 2.3 1.6 3 27 20 a8.4 120 182 4.2 8.6 .7 .5 28 26 aV.8 120 166 4.6 2.6 .6 .2 29 22 a7.4 110 169 4.6 2.6 .5 .2 30 IS a7.0 100 160 S.9 2.6 .3 .2 31 12 - - 140 - 2.6 .3 - * Winter dlacharge measurement made on this day. . a So gage-height record; discharge computed on basis of weather records, b Stage-discharge relation affected by Ice. Hote - Ho gage-height record Oct. 1-8, Apr. 1 to Hay 6; discharge computed on baala of 1 discharge measurement and records for station* on nearby streams. 134 DOLCRES RIVHl BASIN

Discharge, In second-feet, of Haturlta Creek near Horwood, Oolo., 1941-44 Continued 1942-43

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 0.3 2.'sg g _ 74 12 1.8 10 2.5 2 .3 _ 62 18 1.6 2.6 1.8 3 .3 2.1 - 74 10 1.6 1.5 1.2 4 .3 2.1 _ 87 6.8 1.5 1.2 .8 5 .3 2.0 - 64 6.0 1.5 1.2 .7 6 .3 2.2 62 52 4.5 1.3 1.0 .7 7 .4 2.0 31 50 3.4 1.4 .9 .7 8 .5 2-.1 15 38 3.6 1.4 1.0 .5 9 .5 2.1 10 32 3.8 1.4 18 .5 10 .5 1.7 5.7 28 3.9 1.0 2.8 .4 11 .5 _ 5.5 28 3.9 1.0 2.1 .5 12 .8 _ 8.0 26 4.0 1.0 1.7 r.o 13 2.7 _ 10 20 3.9 .9 1.5 8.0 14 1.7 _ 12 14 . 3.8 .5 1.3 1.4 15 1.3 - 14 13 3.3 .5 36 .8 16 1.5 _ 15 11 3.0 .6 48 .7 17 2.2 _ 16 10 3.0 .5 9.8 .6 18 1.9 _ 17 10 2.7 .5 20 5 19 1.7 _ 19 10 2.5 .7 21 .4 20 1.6 - 20 9.8 2.4 1.6 7.6 .3 21 1.6 _ 23 9.6 2.4 5.0 4.0 .4 22 1.7 _ 27 9.2 2.4 1.6 4.0 .4 23 1.8 _ 32 9.0 2.0 1.1 5.2 .3 24 1.8 _ 38 9.8 1.6 1-3 14 .4 25 1.7 - 44 11 1.7 1.9 5.8 5 26 1.7 _ 47 14 1.8 1.2 1.8 1.0 27 1.8 .. 45 13 1.9 1.0 ' 1.5 5.2 28 1.8 _ 50 11 1.8 .9 1.3 1.5 29 2.6 _ 58 , 16 2.0 .9 1.2 .9 30 z'.Qn n _ 68 15 2.0 1.6 2.5 .8 31 - - 13 - 1.4 7.4 - Mote.- Ho gage-height record Apr. 11 to May 13, May 20 to June 9, Aug. 26 to Sept. 12; discharge computed on basis of records for stations on nearby streams.

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0.8 1.6 a22 93 97 5.1 1.4 0.& 2 .8 1.5 a24 43 91 3.8 1.4 .3 3 .7 1.5 a30 19 139 3.8 1.4 .3 4 .6 1.6 a 40 28 96 3.6 1.4 .2 5 .6 1.6 a86 56 61 3.3 1.5 .2 6 .5 1.4 a52 76 46 2.7 1.5 .2 7 .6 1.3 a 48 82 53 2.5 1.5 .2 8 .6 1.2 63 87 50 2.2 1.5 .2 9 .7 1.5 23 100 46 2.0 2.1 .2 10 .8 2.0 27 107 47 1.8 1.9 .1 11 1.9 2.1 46 140 44 1.8 1.7 .1 12 , 2.0 2.0 50 160 41 1.7 1.5 .1 13 1-3 1.9 38 194 34 1.6 1.4 .1 14 1.2 1.9 10 228 31 1.5 1.2 .1 15 1.0 1.9 15 256 25 1.6 1.3 .1

16 1.0 1.9 7.2 240 " 2317 1.3 1.5 .1 17 1.0 2,0 7.6 189 1.3 1.3 .1 18 .9 2.5 16 151 13 1.5 1.2 .3 19 4.4 2.3 16 134 9.8 1.7 3.7 1.1 20 2.7 2.0 7.0 142 9.8 2.1 1.7 .6 21 2.0 1.9 9.2 142 8.6 1.8 1.3 .1 22 1.6 b2.0 7.2 162 6.6 1.7 1.1 .1 23 1.3 bl.9 15 174 3.8 2.2 .9 .1 24 1.2 bl.8 20 168 3.8 2.8 2.7 .1 25 1.2 bl.5 17 148 3.8 1.9 1.8 .3 26 1.3 bl.4 19 i 133 4.2 1.5 1.3 .6 27 1.3 bl.2 36 118 3.8 1.3 1.1 .6 28 1.3 bl.3 62 112 3.8 1.3 .9 .6 29 1.8 bl.3 38 108 4.2 1.4 .7 .4 30 1.8 bl.2 94 105 5.6 1.5 .6 .2 31 1.7 - - 104 - 1.4 .6 - * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of weather records* b Stage-discharge relation affected by Ice. DOLORES RIVER BASIN 135

Monthly discharge, la second-feet, of Haturlta Creek near Norwood., Colo., 1941-44 Seoond- Runoff in Month fcct-days Maximum Minimum Mean acre-feet

7.0 8.64 514 December...... Calendar year ...... _ _ _ _ _

______3,035 170 14 101 6,020 May...... ?...... 4,564 182 94 141 8,860 1,130.9 134 3.9 37.7 2,240 92.0 4.5 2.3 2.97 182 60.3 6.8 .3 1.95 120 September...... 13.7 1.6 .2 .46 27 Water year ...... - - - - -

November 1-10 ...... 41 December...... Calendar year ...... _ _ _ _ _

M _ _ _ _ March 1 _ _ _ _ 692.2 68 27.7 1,370 Hay 1,670 June ...... 124.1 18 1.6 4.14 246 40.2 5.0 .5 1.50 80 237.9 48 .9 7.67 472 September...... 35.4 8.0 .3 1.18 70 Water year ...... - - - - - 81 2.5 1.2 1.71 102 December...... Calendar year ...... _ . _ _ _

_ _ ^ _ March ...... _ _ _ _ _ April...... tfnv 3 QQQ 1 **Q 130 September...... 8.2 1.1 .1 .27 16 Water year ...... - - - - - Tine tjasia: Mountain nai- time. To convert war time to standard time, subtract 1 hour. 136 GREEN RIVER BASIN Green River at Warren Bridge, near Daniel, wyo.

Location.- Water-stage recorder, lat. 43°00', long. 110°07', in sec. 8, T. 35 N., R. Ill W., at Warren Bridge, 12 miles north of Daniel. Datum of gage Is 7,468.09 feet above mean sea level, datura of 1929. Drainage area.- 468 square miles. Records available.- October 1931 to September 1944. Average discharge.- 10 years (1933-36, 1937-44), 487 second-feet. Extremes.- Maximum discharge during year, 3,020 second-feet June 28 (gage height, 4.73 feet}; minimum ddlly, 58 second-feet Nov. 7. 1931-44: Maximum discharge, 3,510 second-feet June 26, 1932 (gage height, 5.08 feet); minimum recorded, 31 second-feet Nov. 26, 1933 (gage height, 0.70 foot), from rating curve extended below 120 second-feet. Remarks.- Records excellent except those for period-of Ice effect, which are fair. Diversions above station for irrigation. Natural regulation by lakes In Green River Basin.

Rating table, water year 1943-44, except period of lee effect.(gage height, In feat, and discharge, In second-feet) 1.1 52 2.6 620 1.3 96 3.1 1,020 1.7 208 3.5 1,410 2.1 340 4.0 2,000 2.4 490 5.0 3,400

Discharge, in second-feet, water year October 1943 to Septeiber 1944 Day Oct. Ncv. Dec. Jan. 1 Feb. Mar. Apr. May June July Aug. Sept.

1 271 190 130 317 1,900 1,940 876 308 2 368 147 140 275 2,180 8,220 836 306 3 262 125 145 253 2,200 2,500 812 317 4 256 105 (») 145 247 1,870 8,710 764 313 5 253 100 150 266 1,540 2,670 692 292 6 247 80 160 340 1,380 2,490 680 271 7 244 58 175 420 1,310 8,360 599 2S6 8 238 70 196 446 1,310 E,200 599 244 9 232 110 220 450 1,360 8,060 592 238 10 229 155 300 452 1,640 1,920 571 238 11 229 370 474 1,460 1,830 SSO 241 13~12 238 350 484 1,340 1,760 632 244 238 320 514 1,260 1,640 526 244 14 229 290 620 1,230 1,570 532 244 15 223 , 170 150 , 135 120 270 684 1,270 1,590 532 238 16 217 290 1,040 1,410 1,690 502 258 17 214 280 1,250 1,640 1,520 467 235 18 211 270 1,%90 1,«30 1,490 415 232 19 244 265 1,200 1,450 1,520 395 238 20 259 265 1,080 1,460 1,690 395 see 190 21 247 265 948 1,660 1,810 410 211 22 241 250 884 1,860 1,840 405 202 23 232 244 868 1,880 1,710 390 196 24 223 247 820 1,690 1,410 376 187 25 223 262 732 1,750 1,210 367 184 26 220 282 684 2,110 1,120 358 181 27 226 288 732 2,j*io 1,080 358 178 28 232 I ( *' 295 892 2,980 1,070 340 178 29 244 <<»> 271 1,160 2,490 1,060 329 178 30 232 1 ' 340 1,410 1,890 1,010 317 193 31 220 - - - 1,760 94S 313 Seccnd- Runoff in Month foct-days Maxima Minium Mean sere-feet

October...... 7,342 271 21] 237 14,560 November...... 4,940 5£ 165 9 800 December ...... 5,270 - 170 10*450 Calendar year 1943 ...... 250,055 3,250 5E 685 496,100 January ...... 4,650 150 9,220 February...... 3,915 _ _ 135 . 7,770 March...... 3,720 _ _ 120 'ftdSO April...... 7,475 370 130 249 14,830 May...... 23,304 1,760 247 752 46,220 June...... 51,950 2«980 1,230 1,732 103,000 July...... 53,558 2,710 , 948 1,728 106,800 August ...... 15,760 876 313 508 31,260 September...... 7,045 317 . 178 236 13,970 Water year 1943-44 ...... 188,929 2,980 58 516 374,700 » Winter discharge measurement made on this day. Note..- Stage-discharge relation affected by ice Hov. 3-7, Apr. 21-22. Ho gage-height record Hov. 8 to Apr. 20 (stage-dtscharge relation affected by Ice during entire period); discharge eon on basis of 6 discharge measurements and weather records. Time baslsi Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 137

Green River near Llnwood, Utah

Location.- Water-stage recorder, lat. 40°58', long. 109°35', in SWi sec. 29, T. 3 N., R. 21 E., a quarter of a mile upstream from Henrys Fork,^ 2 miles south or Wyoming-Utah State line, and 5 miles southeast ot Linwood. Datum ot gage is 5,844.64 feet above mean sea level, unadjusted. Drainage area.- 14,300 square miles. Records available.- October 1928 to September 1944. Records of monthly discharge prior to uctooer 1938 have been republished in Water-Supply Paper 918. Average discharge.- 16 years, 1,729 second-feet. Extremes.- Maximum discharge during year, 15,400 second-feet Apr. 3 (gage height, 9.84 reetj; minimum dally, 400 second-feet Jan. 8-14. 1928-44: Maximum discharge, that of Apr. 3, 1944; maximum gage height, 10.11 feet June 4, 1936, from recorded range in stage and floodmarks; minimum discharge - recorded, 196 second-feet Nov. 27, 1934 (gage height, -0.10 foot). Remarks.- Records good above 4,000 second-feet and fair below. Diversions above station ror irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 869 995 472 430 460 560 5,000 2,850 5,070 8,330 ^2,010 628 2 852 939 520 430 470 560 9,940 2,890 6,440 7,100 f 1,930 606 3 628 896 544 430 470 560 13,400 3,220 7,650 6,340 1,800 592 4 804 852 544 430 460 580 »13,800 2,920 3,970 6,040 1,680 592 5 780 804 644 430 450 580 13,900 2,620 9,310 6,140 1,570 592 6 764 796 610 420 450 580 12,400 2,350 8,240 6,380 1,490 606 7 748 844 592 410 460 600 11,300 2,170 7,020 6,160 1,440 613 8 732 878 620 400 470 620 10,100 2,120^ 6,260 5,700 1,360 606 9 716 804 560 400 480 640 7,870 2,260 6,000 5,200 1,310 58% 10 708 *700 450 400 560 640 5,180 2,480 6,540 4,880 1,240 56? 11 732 700 460 400 500 640 5,420 2,560 6,800 4,470 1,180 550 12 756 796 490 400 490 630 , 4,580 2,580 7,080 4,070 1,120 526 13 740 8S2 520 400 480 610 4,860 2,790 "7,060 3,780 1,070 514 14 724 869 550 400 480 610 5,040 2,860 6,940 3,670 1,030 496 15 740 869 540 410 490 610 4,600 2,960 6,720 3,350 986 490 16 732 8S2 530 415 490 640 3,760 3,120 6,160 3,110 977 490 17 724 836 520 420 480 670 3, 1050 3,570 5,560 2,980 968 496 18 700 B12 520 420 470 700 2,680 4,340 5,270 2,890 950 502 19 780 796 540 410 470 700 2,480 4,980 5,700 2,850 923 496 20 1,030 780 570 405 480 700 2,360 5,360 6,080 2,880 905 514 21 1,100 804 590 410 490 710 2,290 -5,110 5,720 2,860 860 550 22 1,110 812 580 420 489 730 2,290 4,440 5,420 2,820 820 564 23 1,140 828 560. 420 510 770 2,380 3,940 5,560 2,810 796 f»2 24 1,080 820 530 420 540 800 2,470 3,720 5,880 2^810 772 585 25 1,080 826 530 420 560 740 *B,400 3,830 6,080 sfiaSQ 756 544 26 995 836 550 450 540 730 2,340 4,000 5,840 2,770 732 532 27 968 836 »543 440 530 700 2,340 3,880 5,940 2,600 700 508 28 950 860 510 460 530 660 2,440 3,570 6,840 2,470 684 502 29 986 756 470 460 540 720 2,770 3,410 8,610 2,340 660 502 SO 1,190 526 410 460 - 800 3,020 3,480 9,190 2,200 644 508 31 1,120 - 420 460 - 1,900 - 4,070 - 2,060 628 Second- Runoff in Month fee t-daye Maximum Minimum Mean acre-feet October...... 27,118 1,190 70C 875 53,790 November...... 24,569 995 526 819 48,730 December...... 16,489 644 41C1 532 32,710 Calendar year 1943 ...... 1,001,379 12,700 S8C 2,744 1,986,000 January...... 13,060 460 40C 421 25,900 February...... 14,229 560 45C 491 28,220 March...... 21,690 1,900 56C 700 43,020 IptU...... 167,060 13,900 2.29C 5,569 331,400 May...... 104,450 5,360 2,12D 3,369 207,200 JttfiS 199,950 9,310 5.07C 6,666 396,600 July...... 124,880 8,330 2.06C 4,028 247,700 August 33,991 2,010 62C! 1,096 67,420 September...... 16,445 628 49C 548 32,620 Water year 1943-44 ...... 763,931 13,900 40C 2,087 1,515,000 Winter discharge measurement made on this day. Hote.- Stage-discharge relation affected by ice Dec. 6, Dec. 8 to Jan. 11, Feb. 7 to Apr. 1. Ho gage-height record Jan. 12 to Feb. 6 (stage-discharge relation affected by Ice during entire period); discharge computed on basis of weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670050 O - 45 - 10 138 GREQJ RIVER BASIN

Green River at Green River, Utah

Location.- Water-stage recorder, lat. 39°00', long. 110°09', in NWiSWi sec. 15, T. 21 S., R. 16 E., 1 mile southeast of town of Green River, 22 miles upstream from San Rafael River, and 117 miles upstream from mouth. Datum of gage Is 4,040.18 feet above mean sea level, datum of 1929. Drainage area.- 40,600 square miles. Records available.- October 1894 to October 1899, October 1904 to December 1911, June 1924 to septemoer 1944. December 1910 to June 1924 at site 7 miles downstream, published as Green River at Little Valley, near Green River. Records of monthly discharge prior to October 1938 have been republished, with some revisions and additions, in Water-supply Paper 918. Average discharge.- 45 years (1894-99, 1904-44), 6,787 second-feet. Extremes.- Maximum discharge during year, 28,200 second-feet June 4 (gage height, 11.40 feet); minimum, 720 second-feet Jan. 1, 2 (gage height, 4.91 feet). 1894-99, 1904-44: Maximum discharge, 68,100 second-feet June 27, 1917 (gage height, 14.53 feet, site and datum then in use); minimum, 255 second-feet Nov. 26, 1931; minimum gage height, 4.08 feet Aug. 1, Dec. 5, 1934. Remarks.- Records excellent except those for period of ice effect, which are good. Diversions above station for irrigation. Records of water analyses and sediment loads for the water year 1944 are given in Water-supply Paper 1022.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1,790 2,440 2,220 902 1,800 2,020 3,710 5,340 22,900 19,500 4,060 1,480 1,680 2,470 2,120 978 1,800 2,120 3,900 6,130 24,600 20,100 3,820 1,420 1,730 2,530 2.0SO 1,050 1,840 2,240 4,150 7,720 26,400 20,000 3,580 1,380 1,700 2,640 2,060 1,090 1,810 2,340 13,100 7,680 27,900 19,100 3,340 1,370 1,640 2,700 1,960 1,100 1,830 2,320 16,000 7,140 27,500 17,400 3,170 1,340 6 1,660 2,620 1, 730 1,100 1.S60 2,220 17,400 6.S10 27,200 15,300 3,060 1,340 1,710 2,510 1,710 *1,000 1,960 2,280 17,SOO 7,140 26,900 14,200 2,950 1,320 1,660 2,490 1,830 900 1,960 2,470 17,000 7,280 26,500 13,600 2,770 1,300 1,610 2,440 2,080 850 1,980 2,530 15,900 7,100 25,100 13,000 2,640 1,270 1,590 2,340 2,060 800 2,000 2,550 14,600 7,260 23,300 12,300 2,510 1,240 11 1,570 2,280 1,960 S50 2,180 2,730 12,900 7,770 23,300 11,300 2,420 1,220 1,550 2,2SO 1,830 900 2,200 2,920 11,000 9,830 23,800 10,300 2,340 1,220 1,540 2,280 1,860 1,000 2,200 3,040 9,980 11,200 24,700 9,540 2,320 1,210 14 1,590 2,300 1,750 1,100 2,100 3,200 9,200 13,200 25,700 8,850 2,200 1,210 1,810 2,300 1,640 1,180 2,060 3,740 3,610 14,000 26,400 8,090 2,100 1,200 16 1,790 2,240 1,660 1,340 1,960 4,720 8>420 16,000 25,600 7,410 2,020 1,180 1,790 2,260 1,770 1,420 1,940 6,640 8,900 19,200 24; 700 6,850 1,980 1,150 1,770 2,320 1,680 1,420 1,900 10,300 9,100 21,500 23,500 6,246 1,940 1,140 8,280 2,380 1,550 1,470 1,880 7,950 7,910 22,700 21,800 5,830 1,840 1,120 2,620 2,400 1,550 1,470 1,810 6,680 6,810 22,900 20,700 5,440 1,810 1,120 21 2,260 2,400 1,400 *1,450 1,830 6,170 6,090 23,400 20,400 5 , 130 1,770 1,120 2,680 2,700 1,380 1,500 1,830 5,510 5,510 21,500 20,700 4,940 1,750 1,140 2,420 2,700 1,680 1,590 1,790 4,970 5,200 20,300 20,800 4,940 1,750 1,140 2,320 2,570 2,060 1,730 1,830 4,680 4,840 20,300 19,700 5,200 1,810 1,140 2,360 2,570 2,200 1,700 1,940 4,720 4,650 21,200 19,200 4,870 2,120 1,120 26 2,510 2,570 2,260 1,660 1,920 5,300 4,590 22,800 19,400 4,720 1,880 1,120 27 2,620 2,530 2,220 1,700 1,980 4,620 4,620 23,500 20,300 5,100 1,730 1,140 2,640 2,510 2,080 1,770 1-.960 4,230 4,780 22,600 22,700 4,840 1,660 1,160 2,590 2,440 1,790 1,700 1,980 4,120 4,870 21,000 20,400 4,720 1,570 1,200 2,530 2,340 1,290 1,700 - 4,120 5,000 20,400 19,300 4,530 1,550 1,220 2,470 - *1,060 1,800 - 3,790 - 20,800 - 4,290 1,540 Second- Runoff in Month foe t-days Maximum Minimum Mean acre-feet 62,480 2,680 1,540 December...... 56,520 2,260 1,060 1,823 112,100 Calendar year 1943 ...... 2,164,780 29,300 1,060 5,931 4,294,000 40,220 1,800 March...... May......

September...... 36,730 1,480 1,120 1,224 72,850 Water year 1943-44 ...... 2,256,960 27,900 800 6,167 4,476,000 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Jan. 5 to Feb. 14. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hou GREEN RIVER BASIN IS?

Beaver Creek near Daniel, Wyo.

Location.- Water-stage recorder, lat. 43°00', long. 110°09', in sec. 18, T. 35 N., R. Ill to., at Hanson Ranch, half a mile downstream from forks, 1 mile upstream from mouth, 2 miles southwest of Warren Bridge, and 11 miles northwest of Daniel. Drainage area.- 141 square miles. Records available'.- November 1938 to September 1944 (no winter records in 1943). Extremes.- Maximum discharge during year, 625 second-feet Apr. 10 (gage height, 7.32 reet), from rating curve extended above 250 second-feet; no flow for many days July to September. 1938-44: Maximum discharge, 724 second-feet my 2, 1943 (gage height, 8.23 feet): no flow at times In 1940, 1942, 1944. Remarks.- Records fair except those for periods of ice effect or no gage-height record, wnicn are poor. Diversions above station for irrigation.

Discharge, in second-feet.'water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2.8 15 20 171 s.o 3.5 0 1.7 9. 2.7 13 22 102 58 1.4 0 1.4 3 2.7 14 23 66 139 .5 0 1.4 4 2.6 * 1815 («) 84 6S 108 .2 0 1.7 5 2.7 26 86 44 2.0 0 .6 6 8.7 30 104 24 .2 0 .2 7 2.S («) 33 10S 39 .2 0 .2 n 3.0 34 90 33 .5 5 0 9 3.0 40 94 101 1.1 2 0 10 3.0 170 122 235 .2 2 0 11 3.8 512 114 147 .2 2 0 12 4.0 328 74 109 .2 2 .2 13 3.8 854 54 100 .2 2 .5 14 4.8 182 38 67 .2 0 .6 15 4.0 180 33 50 .2 0 .5 14 18 18 14 in 4.8 100 29 33 .2 0 .5 17 4.5 100 67 33 .3 0 1.4 in 4.8 > 15 105 148 32 .3 0 2.9 19 14 110 97 24 .3 0 2.3 20 16 115 48 3.8 .2 0 0 21 15 102 40 .5 .2 .2 0 22 14 86 29 .6 0 0 0 23 14 100 81 3.2 0 0 .5 24 13 122 ,18 4.3 0 0 .6 25 16 149 6.4 1.1 0 0 .5 26 80 16S 4.3 10 0 .2 .5 27 87 178 2.0 54 0 .5 .3 2B 88 158 .5 29 9 1.1 0 29 26 164 .3 15 0 .8 0 30 80 . _ 230 .5 6.4 0 .8 0 31 16 ~ - ~ 2.0 ~ 0 1.7 ~ Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

December ...... 434 . _ 14 861 Calendar year ...... _ _ _ _ _

_ 690 March...... 14 861 128 7,590 May...... 58.9 3,620 1,499.9 50.0 2,980 0 .40 24 .22 13 September...... 18.5 2.9 0 .62 37 Water year 1943-44 ...... 9,525.8 518 0 26.0 18,900 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by Ice Nov. 1, 2, 6, 7. No gage-height record Nov. 8 to Apr. 10, Apr. 15-20 (stage-discharge relation probably affected by Ice during most of period); discharge computed on basis of 3 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 140 QREEN RIVER BASIN

Horse Creek near Daniel, wyo.

Location.- Water-stage recorder, lat. 42°56', long. 110°12', In sec. 10, T. 34 N., R. 112 w., xa miles northwest of Daniel. Datum of gage Is 7,349.88 feet above mean sea level, datum of 1929. Drainage area.- 124 square miles. Records available.- October 1931 to September 1944 (no winter records 1931-39, 1943). Extremes.- Maximum discharge during year, 466 second-feet June 10 (gage height, 1.98 feet); minimum dally, 2.7 second-feet July 14-24. 1931-44: Maximum discharge, 1,670 second-feet May 31, 1936 (gage height, 3.53 feet), from rating curve extended above 800 second-feet: minimum dally, 1 second-foot July 22, 23, 1940. Remarks.- Records good except those for periods of ice effect or no gage-height record, ana tnose for July 1 to Sept. 30, which are poor. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 17 IB 15 80 298 79 13 9.6 2 17 14 16 62 898 66 13 11 3 17 14 19 46 230 58 13 11 4 17 *16 (»> 25 46 163 54 13 11 5 17 IS 3S 53 150 48 13 11 6 17 46 62 163 50 13 11 7 17 56 79 183 16 13 10 8 16 52 96 178 8.4 13 9.6 9 16 62 109 292 6.2 12 9.6 10 16 118 111 410 4.9 12 9.6 11 17 187 109 334 4.4 12 9.6 12 16 156 116 328 3.5 12 9.6 13 16 109 128 275 3.0 12 9.6 14 16 86 173 255 2.7 12 9.6 15 16 62 855 246 2.7 12 9.6 10 > 10 10 10 16 16 57 222 21S 2.7 12 9.6 17 16 58 304 IBS 2.7 12 9.6 18 16 18 5S 189 163 2.7 12 10 19 26 63 12S 160 2.7 12 10 20 22 66 114 148 2.7 11 9.6 21 22 61 116 146 2.7 11 9.6 22 22 51 114 131 2.7 11 9.6 23 20 54 116 123 2.7 11 9.6 24 20 61 104 111 2.7 11 10 25 22 77 94 104 4.1 11 10 26 22 60 94 136 6.3 11 10 27 22 82 123 153 7.0 11 10 28 20 (*> 73 210 104 7.4 10 10 29 20 80 255 84 8.8 10 10 30 19 _ 92 250 71 11 10 11 31- 17 - - - 240 12 10 Second- Runoff in llonth fcot-days MaxiouB Minimal Mean acre-feet October...... 670 26 16 18.4 1,130 November...... 374 12.5 742 December...... 310 . . 10 615 Calendar year ...... _ . . . January...... 310 10 615 February...... 290 _ _ 10 575 March...... 310 _ _ 10 615 April...... 2,050 1S7 15 6S.3 4,070 May...... 4,192 304 46 135 3,310 June ...... 6,821 410 71 194 11,550 July...... 466.7 79 2.7 15.1 926 August...... 364 13 10 11.7 722 Septeaber ...... 300.0 11 9.6 10.0 595 Water year 1943-44 ...... 15,357.7 410 2.7 42.0 30,460 * Winter discharge measurement made en this day. Note.- Stage-discharge relation affected by ice Nov. 1-3. He gage-height record Hov. 5 to Apr. (stage-discharge relation probably affected by Ice during most of period)! discharge computed on basis of 3 discharge measurements and weather records. Time hasIs I Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 141

Cottonwood Creek near Daniel, wyo.

Location.- Water-stage recorder., lat. 42°47', long. 110°09', In sec. 11, T. 32 N., R. j.i» w., 14 miles downstream from forks and 7 miles southwest of Daniel. Drainage area.- 204 square miles. Records available.- October 1938 to September 1944 (no winter records In 1943). April j.916 to septemoer 1919, October 1931 to November 1932 at site 4 miles downstream; records not equivalent. Extremes*- r&xlmum discharge recorded during year, 214 second-feet June 27 (gage height. &.HJ. reet). but may have been higher during period of no gage-height record June 7-17; minimum daily, 6.4 second-feet Sept. 10. 1938-44: Maximum discharge, 689 second-feet Apr. 21, 1943 (gage height, 6.42 feet), from rating curve extended above 420 second-feet; minimum dally not determined, occurred during period of Ice effect. Remarks.- Records excellent except those for period of ice effect or no gage-height record, which are poor. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 23 100 94 94 24 S.8 2 26 80 alOO 90 21 10 3 26 (*)" 64 a!06 8S 19 13 4 26 (*) 64 allo 88 19 16 5 25 70 a96 79 19 14 6 25 77 90 75 17 I2 7 23 73 allo 69 16 ^Itl 8 23 75 a!06 64 14 9.2 9 23 77 alSO 57 13 7.6 10 24 90 aEOO 53 13 6.4 11 24 65 94 alSO 50 12 6.8 12 28 86 a!70 44 12 7.2 13 31 86 a!7o 3S 12 7.6 14 29 88 a!70 31 12 7.6 15 28 92 a!60 25 12 8.0 26 20 > 18 17 22 16 28 94 alSO 22 13 6.4 17 28 94 a!40 IS 15 9.6 18 28 94 133 18 14 12 19 42 94 122 22 13 16 20 43 92 106 34 12 15 21 36 92 108 57 12 13 22 38 78 S6 120 50 12 12 23 37 82 81 138 52 11 12 24 36 94 90 12S 44 11 12 25 3S 110 69 115 42 11 12 26 38 120 66 151 42 10 12 27 41 120 60 206 37 9.2 11 28 42 110 60 160 34 S.8 9.6 29 38 120 71 122 33 8.0 10 30 36 - 130 82 100 31 S.O 14 31 32 "" ~ - 94 29 8.4 Second- Runoff in Month fcot-days Maximum Minima Mean acre-feet

October...... 967 43 23 31.2 1,920 November...... 7SO 26 1,550 December...... 620 - - 20 1,230 Calendar year January 558 _ _ 18 1,110 February...... 493 _ _ 17 978 March...... 682 _ _ 22 1,350 April...... 2,329 130 _ 77.6 4,620 May...... 2,535 100 60 S1.8 5,030 Juno 3,991 206 90 133 7,920 July...... 1,510 94 IS 48.7 3,000 August...... 410.4 24 8.0 13.2 814 September...... 323.8 16 6.4 10.8 642 Water year 1943-44 ...... 15,199.2 206 6.4 41.5 30,160 * Winter discharge measurement Bade on this day. a Ho gage-height record; discharge computed on basis of records for stations on nearby streams. Hote.- Stage-discharge relation affected by Ice HOT. 1-5. No gage-height record HOT. 4 to Hay 5 latage-dlecharge relation affected by ice during moat of period); discharge computed on basis cf 3 discharge measurements and weather records. Time bastst Mountain war time. To convert war time to standard time, subtract 1 bcur. 142 GREEN RIVER BASIH

New Fork River below New Fork Lake, near Cora, Wyo. (Fonnerly published as New Fork below New Fork Lake, near Cora, Wyo.)

Location.- Water-stage recorder, lat. 43°05', long. 110°01', in sec. 20, T. 36 N., R. iJLU w., 2 miles downstream from New Fork Lake and 9 miles north of Cora. Drainage area.- 36.2 square miles. Records available.- October 1938 to September 1944 (no winter records in 1943). Extremes.- Maximum discharge during year, 281 second-feet July 12 (gage height, 4.77 reetj; minimum not determined occurred during period of no gage-height record. 1938-44: Maximum discharge, 430 second-feet May 24, 1941 (gage height, 5.39 feet), from rating curve extended above 325 second-feet; minimum dally, 0.1 second-foot May 13, 1941, when gates in dam at New Fork Lake were closed. Remarks.- Records good. Flow regulated for irrigation by New Fork Lake (capacity, 4S,9OO acre-feet). No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. j May June July Aug. Sept.

1 s,7 9.4 270 260 15 S3 2 9.4 9.0 270 260 15 47 3 9.8 9.0 270 257 15 28 4 9.8 *8.7 268 255 15 28 5 9.8 (*) |j> 5.9 255 255 15 28 fl 9.8 232 247 15 28 7 9.8 232 242 15 29 fl 9.8 229 239 14 27 9 10 f *5.9 229 237 14 27 10 10 5.9 227 234 14 27

11 10 1 O »iC 224 234 15 27 12 10 6.2 222 217 15 26 13 10 6.2 220 276 15 26 14 10 13 227 273 15 26 15 10 28 247 270 19 26 5vO 5.2 5.4 5.6 16 10 > 5.8 29 247 265 45 ; 26 17 10 31 247 263 46 26 18 10 \ 6.8 50 247 260 105 26 IS 10 30 244 257 104 26 20 9.0 30 247 239 73 26 21 9.0 30 250 197 58 26 22 8.7 31 252 195 56 26 SW 8.7 36 250 175 56 25 24 8.7 70 247 129 56 25 25 9,0 69 252 127 56 25 26 9.0 69 257 - 127 55 25 27 9.0 131 263 127 55 25 ?B 9.0 215 260 100 55 25 29 9.4 268 260 15 54 25 30 9.4 - 268 260 15 54 25 31 9.4 " " ' 268 " 15 54 - Second- Runoff in Month foot-days Maximum Minimum Mean ao re-feet

Octo ber...... 295.2 10 8. r 9.52 586 Novenher...... December...... 155. 0 _ 5.0 307 Calendar year ...... _ _ _

March...... _ _ May...... _ 12,420 September...... 834 53 25 27.8 1,650 Rater year 1943-44...... '...... 18,761.1 276 - 51.3 37,220 * Winter discharge measurement made on this day. Note.- No (jage-height record NOT. 5 to May 8 (stage-discharge relation affected by ice during most of period); discharge computed on basis of records of gate openings at New Pork Lake and weather records. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 143 GREEN RIVER BASIN New Fork River near Plnedale, Vfcro. (Formerly published as New Fork near Plnedale, Vftro.) Location.- Water-stage recorder, lat. 42°50', long. 109°51', In sec. 15, T. 33 N., R. 109 W., a quarter of a mile upstream from Pine Creek and 2 miles south of Pinedale. Drainage area.- 241 square miles. Re cords avallable.- October 1938 to November 1944 (discontinued). Extremes'.- tfaximum discharge during period October 1943 to November 1944, 680 second-feet June 27 (gage height, 7.96 feet), from rating curve extended above 320 second-reet; minimum not determined, occurred during period of no gage-height record. 1938-44: Maximum discharge, 1,060 second-feet June 9, 1941 (gage height, 8.63 feet), from rating curve extended above 320 second-feet; minimum dally, 13 second-feet Jfey 18-21, 23, 1940. Remarks.- Records excellent except those for Nov. 7 to Apr. 30, which are poor. Flow regulated for Irrigation by New Fork Lake (capacity, 45,900 acre-feet). Diversions above station for Irrigation. Discharge, In second-feet, 1943-44 Da, Oct. HOT. Dec. Jan. Feo. Bar. Apr. May June July Aug. Sept. 1 42 84 75 40 238 98 27 2 44 56 65 90 21S SI 28 3 46 58 57 210 233 71 29 4 44 59 56 172 268 65 29 5 44 61 («) > 94 55 102 220 69 28 6 45 46 50 77 186 55 28 7 46 35 107 162 51 27 8 45 33 114 148 48 27 9 42 295 37 158 154 46 25 10 40 292 52 249 137 42 25 11 44 298 57 213 137 41 25 12 44 245 55 201 139 39 25 13 43 119 50 1S4 139 37 25 14 43 92 39 170 130 34 25 16 43 74 16 166 131 30 26 40 26 22 27 16 44 79 16 142 162 28 25 17 46 74 19 162 160 30 28 18 47 > 53 72 63 174 150 31 33 19 66 70 35 156 162 29 36 20 70 72 25 142 191 28 36 21 70 67 31 146 203 29 35 22 78 66 30 152 1S2 27 35 23 86 65 26 166 191 28 35 24 eo 66 26 154 177 29 33 25 75 70 23 142 174 30 31 26 64 75 22 241 148 SO 30 27 80 {*) 74 21 615 107 30 30 28 80 75 19 429 90 28 31 29 76 (*) 103 17 307 113 25 31 30 72 - . 117 20 252 97 25 36 31 65 - - - 28 - 95 25 - * Winter discharge measurement made on this day. Hote.- He gage-height record HOT. 7 to Apr. e (stage-discharge relation affected by Ice during ' period); discharge computed on basis cf 3 discharge measurements and weather records. 1944 Day Oat. HOT. Say "Oct. HOT. Day Oct. Nor. 1 45 38 11 32 . 21 33 _ 2 41 39 12 32 _ 22 33 _ 3 40 38 13 32 _ 23 33 H 4 39 40 14 33 H 24 33 _ 5 37 41 15 33 _ 25 33 _ 6 35 44 16 34 26 32 H 7 34 43 17 34 _ 27 32 - S 33 37 18 34 .. 28 32 .. 9 34 35 19 34 _ 29 32 H 10 33 34 20 33 _ 30 34 _ 31 35 - Monthly discharge. In second-feet, 1943-44 Seoond- Runoff In Month foot-days Maximum Minimum Mean acre-feet 1,608 December...... 1,240 - - 40 2,460 Calendar year 1943 ...... 31,905 411 _ 07.4 63,280 806 26 r 1,600 February 638 _ _ 22 1,270 837 _ _ 27 1,660 3,312 296 _ 110 6,570 ttey...... 1,153 75 16 37.2 2,290 5,633- 615 40 188 11,170 5,042 268 90 163 10,000 1,249 93 25 40.3 2,480 September...... 883 36 25 29.4 1,750 Water year 1943-44 ...... 24,169 615 - 66.0 47,950 45 34.3 2,110 November 1-10...... 389 44 34 38.9 772 Mountain war time. To convert war time to standard time, subtract 1 hour. 144 OREEM RIVKP BASIN

New Fork River near Boulder, wyo. (Formerly published as New Fork near Boulder, Wyo.)

Location.- Water-stage recorder, lat. 42°45', long. 109°44', In sec. 9, T. 32 N., R. 108 W., an eighth of a mile upstream from Boulder Creek and half a mile southwest of Boulder. Drainage area.- 552 square miles. Records available.- May 1915 to September 1944, Average discharge.- 29 years, 391 second-feet. Extremes.- Maximum discharge during year, 2,720 second-feet June 28 (gage height, 6.00 reetj; minimum discharge observed, 53 second-feet Mar. 28 (discharge measurement), but may have been less during period of Ice effect. 1915-44: Maximum discharge observed, 12,300 second-feet June 17, 1918 (gage height, 8.7 feet), from rating curve extended above 6,000 second-teet: minimum, 42 second-feet Dec. 15-17, 1915. r Remarks.- Records good except those for period of no gage-height record, which are fair. Flow regulated for Irrigation by New Fork Lake (capacity, 45,900 acre-feet). Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 160 129 223 1,270 1,710 372 150 2 160 129 204 1,630 1,670 345 152 3 139 124 191 1,860 1,740 312 152 4 132 132 182 1,660 1,870 292 152 S 166 134 ieo 176 1,320 1,790 284 147 6 186 129 (*) 167 1,080 1,650 273 152 7 186 ei?5 147 1,080 1,570 265 147 8 126 136 1,040 1,490 254 144 9 121 138 1,060 1,410 251 13S 10 119 *367 15S 1,150 1,260 244 133 11 124 436 167 1,090 1,080 240 130 12 126 417 173 1,070- 992 251 130 13 124 277 173 1,060 950 251 117 14 119 223 176 992 884 240 107 15 116 176 173 992 848 230 104 150 135 > 125 105 16 116 191 207 1,030 848 223 112 17 119 179 288 1,180 806 220 114 18 119 173 475 1,290 776 217 122 19 166 175 173 540 1,250 720 210 130 20 172 173 535 1,250 755 204 127 21 154 170 530 1,370 782 201 128 22 167 167 510 1,480 730 191 120 23 163 164 480 1,650 730 188 120 24 160 167 460 1,650 710 186 120 25 154 173 432 1,530 720 176 114 26 154 179 394 1,760 650 170 114 27 1ST 176 387 2,380 580 170 114 28 167 (*) 176 376 2,640 515 164 114 29 154 ( ) 214 476 2,280 540 15S 114 30 148 (*) 258 670 1,920 505 155 127 ' 31 142 ~ - 962 ~ 376 150 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 4.336 172 116 140 S,600 November...... 4,977 166 9 870 December...... 4,650 I v 150 9)220 Calendar year 1943 ...... 188,971 3,360 92 518 374, 800 January .... 4,185 135 8,300 February...... 3,625 _ _ 125 7,190 arch...... 3,255 _ _ 105 6,460 April...... 6*249 «GOA9a _ 20S 12,390 May...... 10,286 962 136 332 20,400 June...... 42*914 2,640 992 1,430 85,120 July...... 31,657 1,870 376 1,021 62,790 August ...... 7,086 372 150 229 14,050 September...... 3,837 152 104 128 7,610 Water year 1943-44 ...... 127,056 2,640 - 347 252,000 * Winter discharge measurement made on thla day. JJote.- Be gage-height record HOT. 8 to Apr. 9 (stage-discharge relation affected by Ice during lost of period); discharge computed on basis of 4 discharge measurements and weather records. Time pas 1st Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 145 East Pork near Big Sandy, Wyo.

Location.- Water-stage recorder, lat. 42°40 f , long. 109°25 l , In sec. 7, T. 31 N., R. 105 w., i mile downstream from Jim Creek and 4 miles northeast of Big Sandy. Drainage area.- 79.2 square miles. Records available.- October 1938 to September 1944. my 1916 to September 1917, ray 1921 to November 19U3, at site 2 miles downstream, published as East Pork at East Pork Canal. No winter records 1916-17, 1921-23, 1941-44. Extremes.- Maximum discharge during year, 1,130 second-feet May 31 (gage height, 6.21 reetj, from rating curve extended above 820 second-feet; minimum dally, 4.9 second- feet Sept. 13-15, but may have been less during period of no record. 1916-17, 1921-23, 1938-44: Maximum discharge, 1,440 second-feet May 27, 1942 (gage height, 6,73 feet), from rating curve extended above 820 second-feet; minimum discharge observed, 1.2 second-feet Jan. 4, 1940 (discharge measurement), but probably less during period of Ice effect. Remarks.- Records good except those for period of no gage-height record, which are poor. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Daj Oct. Nov. Deo. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 13 16 20 3S 1,010 488 42 S.2 13 bl4 20 38 795 484 39 8.2 12 b!4 20 * 15 36 632 426 35 9.0 4 12 20 , 38 497 366 33 9.0 5 12 15 20 40 53S 324 30 S.6 6 11 _ 20 45 546 296 28 7.8 11 - 20 52 650 272 26 7.0 8 10 - 20 61 605 228 25 6.4 9.4 - 20 61 484 212 24 5.5 10 9.0 - 20 74 442 205 22 5.2 11 11 _ 20 9S 506 190 20 5.5 13 - 20 124 533 163 19 5.2 13 21 152 442 145 20 4.9 14 12 - 21 236 536 13S 17 4.9 15 11 - 22 362 538 128 17 4.9 16 11 _ 22 422 659 122 16 5.5 17 10 - 22 515 605 116 15 6.7 18 10 - 23 434 446 109 14 8.2 19 13 - 23 355 569 107 13 11 20 15 - 24 290 695 112 13 9.8 21 14 _ 25 260 704 109 12 8.6 22 13 - 26 S7S 610 100 11 7.8 23 15 - 27 324 479 91 11 7.0 24 14 - 28 317 596 80 11 7.0 25 15 - 30 341 695 75 11 6.4 26 14 . 30 334 760 67 10 6.1 27 15 - 29 488 668 63 9.4 5.8 28 16 - 30 740 372 5S 9.4 5.8 29 16 _ 40 976 372 54 9.0 5.8 30 15 - 39 1,040 515 51 S.6 6.1 31 16 - - 1,010 - 45 8.6 - Seoond- Runoff In Month foot-days Maximum Minimum Mean aore-fset

74 U o Deoeaber...... Calendar year ...... _ . _ _ _

_ _^, _ _ _ 40 Bay...... July ...... 1 *7*\ September...... 207.9 11 4.9 6.93 412 Water year ...... - - - - - * Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Hote.- Ho gage-height record Apr. 1 to Hay 7 (stage-discharge relation affected by Ice during most of period); discharge computed on basis of weather records and records for Pole Creek below Little Half Moon Lake, near Flnedale. Tine basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 146 GREEN RIVER BASIN

Silver Creek near Big Sandy, Wyo.

Location.- Water-stage recorder, lat. 42°45', long. 109°31', in sec. 17, T. 32 N., R. lue w., at feller Ranch, 1 mile downstream from South Fork, 8 miles northwest of Big Sandy, and 11 miles east of Boulder. Drainage area.- 45.4 square miles. Records available.- October 1938 to September 1944 (no winter records 1942-44). Extremes.- Maximum discharge during year, 628 second-feet May 29 (gage height, 6.63 feet), from rating curve extended above 450 second-feet; minimum dally, 0.1 second-foot Aug. 29 to Sept. 30. 1938-44: Maximum discharge, 710 second-feet May 26, 1942 (gage height, 7.04 feet), from rating curve extended above 450 second-feet; no flow at times in most years'. Remarks.- Records good except those for period of no gage-height record, which are poor, one small diversion above station.

Discharge, in second-feet, wster year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1.6 2.6 579 82 5.1 0.1 1.4 3.4 526 71 3.8 .1 1.3 2.6 430 60 3.2 .1 4 1.2 2.S 355 51 2.6 .1 1.1 *2.S a!6 373 45 2.4 .1 6 1.0 _ 373 41 2.0 .1 .8 - 454 38 1.6 .1 .S - 395 36 1.4 .1 .7 _ *a24 349 33 1.4 .1 .6 - a28 318 30 1.7 .1 11 1.3 _ a34 SOS 27 1.6 .1 1.7 _ a45 312 26 1.3 .1 1.4 - a59 288 24 1.2 .1 1.3 - a78 329 22 1.1 .1 1.1 - 129 310 19 1.0 .1 16 1.0 _ 166 338 18 .8 .1 1.0 - 194 329 16 .7 .1 1.0 _ 167 276 21 .6 .1 £.4 - 132 278 36 .6 .1 2.4 - 121 302 33 .5 .1 21 2.S _ 122 286 30 .5 .1 . 1.7 132 244 26 .3'.4 .1 23 2.0 - 156 194 23 .1 2.8 - 153 170 19 .2 .1 2.4 - 162 164 16 .2 .1 26 2.4 _ 174 167 14 .2 .1 2.6 _ 290 186 12 .2 .1 3.0 _ 439 136 10 .2 .1 2.8 - 519 103 9.0 .1 .1 3.0 _ 543 SB 7.2 .1 .1 2.4 - 534 6.3 .1 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

December...... Calendar year ...... _ _ _ _ _

March...... April ...... May...... July...... September ...... 3.0 .1 .3 .10 6.0 Wster year ...... - - - - - * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of 1 discharge measurement and weather records, Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 147

Pine Creek at Plnedale, Wyo. Location.- Water-stage recorder, lat. 42°52', long. 109°52', In sec. 33, T. 34 N., R. 109 w., at Plnedale, 3 miles upstream from mouth. Datum of gage Is 7,165.40 feet above mean sea level, datum of 1929. Drainage area.- 118 square miles. Kecoras available.- April to October 1904, May 1915 to September 1944. Average discharge.- 29 years, 133 second-feet. Jiactremes.- Maximum discharge during year, 1,090 second-feet June 28 (gage height, 3.21 reet;; minimum dally, 3.9 second-feet Nov. 25, 26. 1904, 1915-44: Maximum discharge, 2,310 second-feet June 17, 1918 (gage height, 5.0 feet); minimum, 2 second-feet Apr. 1-36, May 6-8, 1931. Remarks.- Records good except those for period of no gage-height record, which are fair. Diversions above station for irrigation. Flow regulated by Fremont Lake {regulated capacity, 20,600 acre-feet, of which 9,840 acre-feet Is for power purposes and 10,760 acre-feet is for Irrigation). Discharge measurements, in second-feet, of diversions aboue station are clven in following table:

Date Ditch, May 29 June 20 July 17 Aug. 18 86.4 87.4 76,5 0.8 25.8 31.8 42.2 21.3 11.2 51.3 52.8 5.3 11.1 16.0 16.0 2.2 Total second-feet ..... 134 186 197 29.6 Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July - Aug. Sept.

1 46 S.O 31 36 33 33 30 37 238 855 90 50 39 8.0 43 35 34 33 40 36 323 835 88 50 25 S.O 37 34 35 33 37 36 389 920 79 50 85 S.O 37 34 36 33 39 35 414 930 79 49 22 e.o «36 34 36 33 39 28 373 900 79 54 6 81 S.O 35 35 36 32 39 IS 334 885 79 57 80 8.0 35 35 36 33 36 15 327 855 77 55 14 8.0 35 35 37 34 35 15 306 805 77 54 13 8.0 35 34 37 35 35 15 303 745 75 54 10 11 8.0 36 34 36 35 35 14 896 603 77 58 11 11 8.0 37 35 35 34 35 14 290 477 77 58 12 8.0 8.0 39 36 33 34 34 14 890 423 79 44 13 7.8 8.0 39 36 33 34 38 14 283 385 81 30 7.2 7.2 39 37 33 35 32 14 261 368 79 28 7.8 7.8 40 37 33 35 32 14 277 368 79 28 16 7.2 6.4 40 37 33 35 38 15 310 344 77 42 17 7.2 6.4 41 37 33 35 31 83 348 330 77 42 18 7.2 6.4 48 37 33 35 31 34 365 286 77 42 7.8 5.5 41 36 33 36 31 48 368 23S 75 40 8.0 5.5 40 36 32 36 31 50 386 842 75 39 21 8.0 5.1 40 35 38 37 30 55 459 238 75 36 8.0 4.3 40 35 33 37 29 57 568 238 72 35 23 8.0 4.3 3S 35 34 36 30 61 598 238 78 34 24 8.0 4.3 38 35 35 36 29 63 598 72 38 25 8.0 3.9 37 34 34 35 . 30 59 657 845 72 31 '68 26 S.9 3.9 36 34 33 34 30 57 810 806 30 27 8.9 12 34 33 «38 33 89 43 1,000 194 66 89 28 8.9 26 34 32 32 «32 31 40 1,050 185 64 28 8.0 31 35 38 31 28 39 50 1,000 813 64 28 8.0 32 36 33 _ 29 39 90 915 150 57 30 31 8.0 - 36 33 - 26 150 79 50 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 404.1 46 7.£i 13.0 808 275.4 38 3.S> 9.18 546 December...... 1,168 43 31 37.5 8,300 Calendar year 1943 ...... 63,672.5 1,270 3.S) 174 126,300 1,081 37 32 34.9 2,140 983 37 31 33.9 1,950 March...... :...... 1,046 37 26 33.7 2,070 1,002 40 89 33.4 1,990 May...... 1,208 150 14 39.0 2,400 14,117 1,050 238 471 88,000 July...... 14,050 930 79 453 27,870 2,308 90 50 74.5 4,580 September ...... 1,225 57 28 40.8 8,430 Water year 1943-44 ...... 38,861.5 1,050 3.S 106 77,080 * Winter discharge measurement made on this day. Note.- Ho gage-height record Dec. 6 to Mar. 27 (stage-discharge relation affected by Ice during most of period); discharge computed on basis of 1 discharge measurement and weather records. Time baala: Mountain war time. To convert war time bo standard time, subtract 1 hour. 148 GREEN RIVER BASIN

Pole Creek below Little Half Moon Lake, near Plnedale, Wyo.

Location.- Water-stage recorder, lat. 42°53', long. 109°43', In sec. 26, T. 34 N., R. iOs w., It miles downstream from Little Half Moon Lake and 7 miles east of Plnedale. Drainage area.- 87.5 square miles. Records available.- October 1938 to September 1944 (no winter records 1943, 1944) Extremes.- Maximum discharge during year, 792 second-feet June 28 (gage height. 6.01 reet;; minimum dally, 9.8 second-feet Oct. 10, 17, 18, Nov. 1-3, but probably less during period of no record. 1938-44: Maximum discharge, 1,090 second-feet June 23, 1943 (gage height, 6.73 feet); minimum daily. 3.7 second-feet Aug. 30 to Sept. 1, 1940 (probably less during period of ice effect). Remarks.- Records fair above 200 second-feet and poor below. Several small diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to Septaaber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

I 27 9.8 10 23 656 464 92 17 2 25 9.S 10 23 760 473 36 15 3 23 9.S 10 22 1 760 500 83 15 4 20 11 10 23 656 544 76 13 5 17 13 10 25 537 527 70 15 6 16 13 t!5 10 27 453 4S2 62 17 7 16 _ 10 29 426 449 60 IS 8 13 _ 10 34 422 422 53 18 9 11 _ 10 37 434 389 56 19 10 9.8 - 10 41 434 , 353 55 17 11 15 _ 10 45 413. 323 54 18 12 16 _ 10 49 401 305 64 18 IS 16 _ 10 55 392 281 52 17 14 14 _ 10 64 383 261 43 17 15 13 - 11 SI S95 233 44 16 16 12 _ 11 106 434 220 41 17 17 9.8 . IS 150 497 208 39 16 18 9.8 . 13 195 537 198 37 17 19 IS _ 13 21S 515 190 34 16 20 12 -. 13 242 503 ISO 31 15 21 11 _ 13 24S 540 178 29 16 . 22 11 ' 14 245 604 173 27 17 23 _ 15 239 618 167 26 17 _ 24 11 '- 16 218 565 162 24 16 25 12 17 215 537 154 21 14 26 13 _ 17 205 6O4 146 18 14 27 13 - 16 2OO 730 136 20 13 28 13 _ 17 228 768 125 - 20 12 29 IS _ 24 311 638 116 20 11 30 11 _ 23 434 509 107 19 10 31 10 - 544 99 17 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 437.4 27 9.E> 14.1 868 November 1-6 ...... 66.4 13 9.E) 11.1 132 December...... - Calendar year ...... - - - - - January...... _ _ _ _ _ February...... _ _ _ _ _ March ..... _ _ _ _ . April,...... 385 24 10 12.8 764 May...... 4,576 544 22 146 9,080 June...... 16,125 768 383 538 31,980 July 8,564 544 99 276 16,990 August ...... 1,373 92 17 44.3 2,720 September...... 471 19 10 15.7 934 Water year ...... '...... - - - - - t Result of discharge measurement. Kote.- Ho gage-height record Apr. 1-22 (stage-discharge relation probably affected by ice duping part o? period); discharge computed on basis of weather records and recorded range in stage. Time baais; Mountain war time. To convert war time to standard tine, subtract 1 hour. QREEK RIVER BASIN 149

Fall Creek near Plnedale, Wyo.

Location.- Water-stage recorder, lat. 42°51', long. 109°43', in sec. 2, T. 33 N., R. 108 W., at Mclntosh Ranch, half a mile downstream from Meadow Creek, 3 miles downstream from Burnt Lake, and 8 miles east of Pinedale. Drainage area.- 37.2 square miles. Records available.- October 1938 to September 1944 (no winter records 1943, 1944). my 1904 to October 1905 at site li miles downstream published as Pall Creek at Fayette. Extremes.- Maximum discharge during year, 352 second-feet June 1 (gage height, 7.32 feet); minimum daily recorded, 0.8 second-foot Oct. 10, 31, Nov. 1-2, but may have been less during period of no record.' 1904-5. 1938-44: Maxirnita discharge, 546 second-feet June 22, 1943 (gage height, 7.83 feet); minimum daily, 0.1 second-foot Sept. 21, 1942. Remarks.- Records good. Practically no diversions above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. ' Jan. Feb. Mar. Apr. May June July Aug. Sept. 's.l 1 4.1 o.s 10 _ 8.1 336 SOS as 7.7 2 3.7 .8 9.2 _ 4.9 7.7 336 ai2 27 S.I 3 3.6 1.5 S.9 _ 4.9 S.I 287 216 26 11 4 3.4 1.4 S.5 _ 5.3 8.1 243 SOS 84 10 5 3.0 1.9 8.1 - 5.3 8.5 20S 185 24 10 6 2.6 1.1 7.0 _ 5.5 S.5 185 16S 23 10 7 2.0 1.0 - _ 5.1 S.9 189 156 23 9.6 8 1.3 1.1 - _ 5.1 9.2 200 141 21 9.6 9 1.1 1.1 _ _ 4.9 10 191 122 81 9.2 10 .8 1.0 - - 5.1 11 180 109 SO 7.7 11 2.4 1.0 _ _ 5.5 12 175 99 20 5.0 12 8.9 1.0 - _ 5.3 12 175 90 19 4.9 13 6.6 1.0 - _ 5.S 14 176 S2 18 4.9 14 4.7 1.0 - _ 5.5 16 176 77 18 7.7 15 4.0 6.6 - - 6.0 19 183 73 16 7.3 16 3.S 9.2 _ _ 5.S 21 SIS 69 16 5.5 17 3.6 9.2 - _ 5.5 2S 240 65 16 4.0 18 3.3 8.5 - _ 5.8 51 832 62 15 3.3 19 6.5 7.7 - _ 5.S 77 212 B9 14 3.1 20 3.3 7.7 - - 5.5 94 230 56 14 2.6 21 2.7 7.3 _ _ 5.5 101 254 54 12 6.6 22 2.7 7.3 - _ 5.5 105 261 52 IS 5.5 23 2.2 7.3 - _ 5.5 105 243 49 12 5.5 24 2.1 7.3 - _ 5.5 103 ZZS 46 11 5.5 25 2.0 7.0 - - 5.8 101 245 43 10 7.0 26 1.9 8.5 _ _ 5.S 99 271 40 10 6.6 27 2.0 a.i - _ 6.0 103 320 37 10 4.7 28 1.6 9.2 - _ 6.2 1S6 245 35 9£ 4.7 29 1.0 9.2 - _ S.I 183 200 33 B£ 3.6 30 .9 10 _ 5.1 7.7 245 192 32 as 3.S 31 .8 - - 5.1 290 29 7.7 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 91. 6 S*9 O.E 2.95 182 November ...... 145.8 10 .£ 4.86 289 December 1-6 ...... 51.7 10 7.C 8.62 103 Caleudar year ...... _ _ _ _ January...... February...... _ _ _ _ _ llarch...... _ _ _ _ _ April ...... 169.3 8.1 4.9 5.64 336 Hay...... 1,993.1 290 7,1 64.3 3,950 June ...... 6.S19 336 175 227 13,530 July...... 2,907 216 89 93. S 5,770 August ...... 514.3 1.1 16.6 1,080 September...... 195.5 11 2.6 6.52 388 Water year ...... - - - - - Time baslar Mountain war time. To convert war time to standard time, subtract 1 hour. 150 GREEN RIVER BASIN

Boulder Creek below Boulder Lake, near Boulder, Wyo.

Location.- Water-stage recorder, lat. 42°50', long. 109°43', In see. 14, T. 33 N., R. 108 W., 1 mile downstream from outlet of Boulder Lake and 5 miles north of Boulder. Drainage area.- 130 square miles. Records available.- October 1938 to September 1944 (no winter records In 1943). April 1904 to October 1906, May 1915 to October 1924, May 1931 to November 1932, chain gage at site 4 miles downstream; records not equivalent. Extremes.- Maximum discharge during year, 1,700 second-feet June 2 (gage height, 5.15 feet); minimum dally, 2.6 second-feet May 5, but probably less during period of no record. 1938-44: Maximum discharge, 2,440 second-feet June 22, 1943 (gage height, 5.96 feet); no flow Nov. 28, 1939, to Apr. 15, 1940. Remarks.- Records excellent except those for period of no gage-height record, which are poor. Flow slightly regulated by Boulder Lake (capacity, 11,000 acre-feet). No diversion above station.

Rating table, water year 194S-44 (gage height, In feet, and discharge, in second-feet) O.S 2.4 1.9 74 3.3 510 .9 3.2 2.0 94 3.9 805 4.S (26 2.2 140 4.5 1,130 1.1 7 35 2.5 SIS 5.5 2,020 1.2 68 2.8 310

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 96 30 3.0 1,580 1,030 153 133 2 86 30 3.0 1,640 1,090 145 130 3 76 29 2.8 1,440 1,100 138 128 4 71 29 2.7 1,140 1,030 133 128 5 66 «28 2.6 962 373 128 126 6 61 28 (*) 2.7 396 690 123 126 7 56 28 2.8 968 715 121 123 8 52. 27 2.9 1,060 690 118 123 9 48 27 3.2 930 640 116 140 10 45 27 34 396 578 114 156 92 816 542 155 150 11 44 26 7.0 12 42 26 133 800 601 184 145 13 40 26 133 794 453 182 143 14 S3 25 133 327 417 179 135 15 37 25 145 890 589 176 130 5.0 16 > 14 > 11 16 35 25 150 1,020 365 174 126 17 33 24 202 1,190 342 171 121 18 32 24 324 1,150 324 169 114 19 36 24 334 1,030 310 166 109 20 35 23 338 1,240 300 166 101 21 36 23 342 1,460 293 16S 94 22 35 23 342 1,510 283 161 86 23 34 22 4.6 345 1,330 270 158 S2 24 34 22 4.6 345 1,200 255 156 76 25 33 22 4.6 345 1,340 238 150 69 26 33 12 4.5 345 1,500 224 148 66 27 33 3 4.2 349 1,660 205 145 61 28 33 3 4.0 369 1,390 192 143 58 29 32 3 4.2 445 1,050 132 140 54 30 30 3 _ 3.1 373 980 171 138 53 31 30 - 1,330 - 161 135 - Second- Runoff in Month foot-clays Maximum Minimum Mean acre-feet

October...... 1 ,392 96 30 44.9 2,760 November ...... 667 30 3 gg ^g 1,320 December...... 155.0 5.0 307 Calendar year ...... - - - - January...... 496 16 984 February...... 406 -> 14 305 March...... 341 ~ 11 676 April ...... 187.8 3.1 6.26 372 May...... 7,533.7 1,330 2.6 243 14,940 June ...... 34,789 1,660 794 1,160 69,000 July...... 14,858 1,100 161 479 29,470 August...... 4,62S 184 114 149 9,180 September...... 3,236 156 53 110 6,520 Water year 1943-44 ...... 63,739.5 1,660 - 183 136,300 * Winter discharge measurement made on this day. Mote.- Ho gage-height record HOT. 6 to Apr. ZZ (stage-discharge relation affected by ice most of period); discharge computed on basis of 1 discharge measurement and storage records (meager and In­ definite) in Boulder Lake. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 151

North Piney Creek near Mason, Wyo.

Location.- Water-stage recorder, lat. 32°40' long. 110°21', In sec. 19, T. 31 N., R. 113 W., 4 miles west of Mason. Drainage area.- 58 square miles. Records available.- May 1915 to October 1916, October 1931 to September 1944 (no winter records most years). Extremes.- Maximum discharge during year, 274 second-feet June 27 (gage height, 3.08 feetj; minimum not determined, occurred during period of no gage-height record. 1915-16, 1931-44: Maximum discharge, 613 second-feet June 19, 1916 (gage height, 3.93 feet), from rating curve extended above 450 second-feet; minimum not determined (probably occurred during winter). Remarks.- Records good except those for period of ice effect or no gage-height record, which are poor. Several small diversions above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 28 43 170 200 49 3» 2 27 41 175 202 46 32 3 27 (») 37 149 196 47 32 4 27 (») 40 126 162 46 32 5 27 47 116 166 44 28 6 27 54 114 157 42 27 7 26 62 121 147 41 26 8 26 64 139 139 41 24 9 26 66 234 128 39 24 10 26 *66 234 119 37 24 11 27 69 2OO 109 37 23 12 29 79 137 106 36 23 13 27 39 ISO 99 34 22 14 26 102 193 91 34 22 15 25 121 202 85 34 22 > 22 > 19 17 16 18 > 35 16 25 123 218 83 33 22 17 24 149 224 SO 33 22 18 24 118 194 77 32 24 19 31 94 191 eo 31 24 20 27 82 218 92 so 23 21 27 77 245 78 30 82 22 27 74 249 73 29 21 23 26 80 226 71 29 21 24 25 78 226 67 29 21 25 25 76 247 66 28 21 26 26 72 267 63 27 20 27 26 80 247 60 27 20 28 26 108 206 57 29 21 29 24 136 191 56 31 21 30 24 - 147 194 54 31 23 31 24 - ~ " 151 - 52 30 " Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 812 31 24 26.2 1,610 November...... 660 22 1,310 December...... 589 . _ 19 1,170 Calendar year ...... _ _ _ _ _ January...... 827 17 1,050 February...... 464 _ _ 16 920 March...... 558 _ _ 18 1,110 April ...... 1,050 _ _ 35 2,080 May 2,627 151 37 64.7 5,210 June ...... 5,883 267 114 196 11,670 July...... 3,234 202 52 104 6,410 August ...... 1,088 49 27 35.1 2,160 September...... 717 32 20 23.9 1.-420 Water year 1943-44 ...... 18,209 267 - 49.8 36,120 » Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov. 1-4. No gage-height record Nov. 5 to May 9 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams. Time basisj^ Mountain war time. To convert war time to standard time, subtract 1 hour. 152 ORSES RIVER BASIN

Middle Piney Creek below South Fork, near Big Plney, Wjro.

Location.- Water-stage recorder, lat. 42°36', long. 110°28', In sec. 7, T. 30 N., R. 114 W., 1 mile downstream from South Fork and 18 miles northwest of Big Piney. Drainage area.- 34.3 square miles. Records available.- July 1939 to September 1944 (no winter records in 1£43). Extremes.- Maximum discharge during year, 104 second-feet June 9 (gage height, 5.SO feet); minimum not determined (occurred during period of no gage-height record). 1939-44: Maximum discharge, 254 second-feet June 29, 1943 (gage height, 6.33 " feet), from rating curve extended above 190 second-feet; minimum not determined (occurred during period of ice effect). Remarks.- Records good except those for period of ice effect or no gage-height record, which are poor. Flow regulated by Middle Piney Lake (usable capacity, 4,200 acre- feet) .

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. , 1 20 b!5 18 68 92 39 24 2 20 blS 17 58 98 3S 24 3 20 *b!5 (*) 16 52 96 38 23 4 20 16 17 47 92 37 23 5 20 14 19 46 S9 36 22 6 20 13 20 44 86 34 21 7 19 13 21 47 65 33 21 8 19 14 22 55 82 31 21 9 ie 15 83 95 79 31 21 10 ie 15 «24 88 78 30 20 11 18 16 23 78 74 30 20 12 18 16 23 75 71 29 19 13 18 16 24 74 75 28 18 14 19 16 27 75 81 28 16 15 18 16 30 75 78 28 ie 13 12 11 12 16 16 ie 16 31 76 76 27 ie 17 ie 16 41 76 75 26 ie 18 16 16 36 71 73 26 18 19 19 16 33 71 74 25 18 20 18 16 32 76 73 24 17 21 18 15 33 81 68 24 17 22 17 15 35 79 67 24 16 23 16 14 39 76 63 24 16 24 16 14 36 -61 63 24 16 25 16 13 36 88 62 23 16 26 16 12 35 95 57 24 16 27 17 13 37 94 47 26 16 28 1? 13 42 83 44 25 16 29 16 13 46 ' 6663 43 24 16 30 16 13 _ 49 42 24 17 31 D15 - - - 52 - 41 24 - Second- Runoff in Month foot-days Maximum Hioimun Mean acre-feet October...... 556 20 15 17.9 1,100 November ...... 440 16 12 14.7 873 December...... 403 13 799 Calendar year ...... _ - _ _ _ January...... 372 12 738 February...... 319 _ _ 11 633 aroh...... 372 _ _ 18 738 April...... 480 _ _ 16 952 May...... 937 52 16 30.2 1,860 June...... 2,183 95 44 72.8 4,330 July...... 2,224 98 41 71.7 4,410 August 884 39 23 28.5 1,750 September...... 564 24 16 16.8 1,120 Water year 1943-44 ...... 9,734 98 - 26.6 19,300 » Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Note.- No gage-height record NOT. 4 to May 9 (stage-discharge relation affected by Ice during most of period); discharge computed on basis of 1 discharge measurement, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVKR BASIN 153

Labarge Creek near Viola, Wyo. Location.- Water-stage recorder, lat. 42°13', long. 110°19'. in sec. 19, T. 26 N., R. 113 W., a quarter of a mile upstream from the narrow^, 24 miles downstream from Spring Creek, 4i miles southeast of Viola, and 7 miles southwest of Labarge. Drainage area.- 172 square miles. Records available.- October 1940 to September 1944. April to September 1913, April 1915 to September 1916 at site three-quarters of a mile downstream, published as Labarge Creek near Labarge. April 1932 to August 1939 at site 7- miles downstream, published as Labarge Creek near Labarge; records not equivalent. Extremes.- Maximum discharge during year, 384 second-feet June 10 (gage height, 5.48 feet); minimum daily, 29 second-feet Aug. 18. 1913, 1915-16, 1940-44: Maximum discharge, 547 second-feet May 5, 1943 (gage height, 6.01 feet); minimum daily, 4 second-feet July 5-14, 1915. Remarks.- Records good except those for period of no gage-height record, which are fair.

Discharge. In second-feet, water year October 194S to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 71 68 72 123 218 103 52 36 2 69 71 68 103 259 98 52 38 3 69 *69 (*) 64 80 249 96 50 38 4 71 68 66 94 204 68 50 39 5 72 62 70 129 1S2 65 48 58 6 72 56 7B 1S6 175 89 46 36 7 71 60 *101 188 176 96 46 35 8 72 62 101 196 168 92 46 35 9 72 65 94 207 31S 92 45 34 10 71 66 87 229 354 83 44 35 11 76 66 87 220 318 72 44 36 12 SO 68 109 215 283 68 41 36 13 81 68 96 229 267 63 39 37 14 78 66 8S 246 241 64 39 38 15 77 64 71 286 224 63 37 36 > 58 > 56 58 . 62 16 77 66 76 280 215 62 36 38 17 76 66 72 339 213 60 34 38 18 76 66 68 278 190 59 29 41 19 92 64 66 211 178 65 31 43 20 84 66 82 192 171 75 33 40 21 82 68 75 186 169 67 33 38 22 81 68 73 164 160 62 33 38 23 78 64 65 180 156 61 33 44 24 80 68 72 156 143 62 34 5B 25 78 54 80 154 119 63 33 58 26 SI 52 89 154 136 61 33 57 27 80 58 <») 103 162 149. 61 36 57 28 82 60 96 154 126 59 36 58 29 82 58 89 162 115 55 35 58 30 80 58 - 126 192 109 52 36 64 SI 77 - - - 184 - 52 36 Second- Runoff in Month foot-days Maximum Minimum Mean ao re-feet

October...... o yQQ 92 77.0 4,740 Movenber...... 1^905 71 52 63.5 3,780 December...... 1,799 58- 3,570 Calendar year 1943 ...... 50,743 538 139 100,700 January...... 1,736 56 3,440 February...... 1,6S2 58 3,340 flO March...... 1,922 O<£ 3,810 April ...... 2,484 126 64 82*8 4,930 May...... 5,899 339 80 19O 11,700 June ...... 6,005 354 109 200 11,910 July...... 2,228 103 52 71 9 4,420 Augunt ...... 1,219 52 29 39.3 2,420 September...... 1,279 64 34 42.6 2,540 Water year 1943-44 ...... 30,546 354 29 83.5 60,600 » Winter discharge measurement made on this day. . Note.- No gage-height record Nov. 4 to Apr. 6 (stage-discharge relation affected by ice. during most of period)j discharge computed on basis of 2 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 11 154 GREW RIVER BASIN

Fontenelle Creek near Fontenelle, Wyo.

Location.- Water-stage recorder, lat. 42°06' long. 110°13', in sec. 3, T. 24 N., R. 113 W., 6 miles west of Fontenelle. Drainage area.- 224 square miles. I Records available.- May 1915 to September 1919, October 1931 to September 1944. Average discharge^- 16 years (1916-19, 1931-44), 58.1 second-feet. Extremes.- Ifexlmum discharge during year, 288 second-feet June 10 (gage height, 2.41 feet); minimum daily recorded, 14 second-feet July 20-22, Sept. 15, but may have been less during period of no gage-height record. 1915-19, 1931-44: Maximum discharge observed, 922 second-feet Apr. 19, 1938 (gage height, 4.00 feet, site and datum then in use), from rating curve extended above 380 second-feet; no flow Aug. 1-5, Aug. 23 to Sept. 15, 1934, June 27-30, Sept. 13-27, 1940. Remarks.- Records excellent except those for period of no gage-height record, which are poor. Diversions above station for irrigation. Ratine table, water year' 1945-44, except period of lee effect (gage height, In feet, and discharge, In second-feet) (ShiftIng-control method used Oct. 1-22) 0.9 13 1.2 41 2.0 170 1.0 21 1.4 68 2.2 220 1.1 30 1.8 J.32 2.4 286

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 24 32 42 146 129 67 24 16 2 24 37 38 117 166 60 23 16 3 23 *41 (*) 46 91 198 57 23 17 4 25 41 62 82 160 49 24 19 5 28 40 94 96 143 45 24 19 6 29 34 115 130 137 39 22 19 7 30 31 »158 139 136 26 21 20 8 29 32 162 137 148 22 24 20 9 28 33 143 127 215 21 24 19 10 28 33 117 146 260 18 23 19 11 30 34 118 137 244 17 22 19 12 38 34 182 127 218 17 SI 18 13 37 34 127 126 205 16 21 17 14 32 33 112 130 192 16 21 15 15 31 32 77 143 175 15 26 14 26 24 20 22 16 31 32 71 148 152 15 26 15 17 31 32 65 152 141 15 25 16 18 30 32 61 160 134 15 24 17 19 40 32 65 141 120 15 22 20 20 48 33 66 127 113 14 21 20 21 41 34 80 118 110 14 19 19 22 44 34 70 113 107 14 20 19 23 41 33 72 122 105 15 19 19 24 40 32 88 125 96 15 17 19 25 38 30 101 109 88 15 17 18 26 41 25 124 109 97 17 17 19 27 41 26 (*) 126 /102 107 26 17 19 28 42 27 117 102 101 24 16 19 29 44 26 107 110 62 24 16 19 30 41 26 _ 168 118 72 24 16 25 31 39 ' - - 122 24 16 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 1,068 48 23 34.5 2,120 November...... 974 41 25 32.5 1,930 December...... S06 26 1,600 Calendar year 1943 ...... 34,851 498 _ 95.6 69,130 January...... 744 24 1,480 February...... 580 _ _ 20 1,150 March...... 682 _ _ 22 1,350 April ...... 2,993 182 38 99.8 5,940 May...... 3,860 160 82 124 7,640 June ...... ' 4,351 260 72 146 8,630 July...... 773 67 14 24.9 1,530 August ...... 650 26 16 21.0 1,290 September ...... 549 25 14 16.3 1,090 Water year 1943-44 ...... 18,020 260 - 49.2 35,750 * Winter discharge measurement made on this day. Note.- No gage-height record Nov. 4 to Apr. 6 (stage-discharge relation affected by lc& during most of period); discharge computed on basis of 2 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 155

Big Sandy Creek at Leckle Ranch, near Big Sandy, Wyo.

Location.- Water-stage recorder, lat. 42°35', long. 109°17', In sec. 18, T. 30 N., R. 104 to., at Leckle Ranch, hair a mile downstream from Squaw Creek and 9 miles southeast of Big Sandy. Drainage area.- 94 square miles. Records available.- July 1910 to August 1911, July 1939 to September 1944 (no winter records 19IU-1J., 1942 44). Extremes.- Maximum discharge during year, 730 second-feet June 26 (gage height, 5.78 reetj; minimum not determined (occurred during period of Ice effect). 1910-11, 1939-44: Maximum discharge, S90 second-feet May 27, 1942 (gage height, 6.18 feet), from rating curve extended above 700 second-feet; minimum observe'd, 4.8 second-feet Jan. 4, 1940 (discharge^measurement), but probably less during period of Ice effect. Remarks.- Records excellent except those for period Oct. 1 to Nov. 3, which are good. Few diversions above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 19 29 a 50 614 447 63 13 2 18 38 a50 307 443 60 14 3 IS 40 a50 255 411 57 14 4 18 37 a50 199 383 54 14 5 18 26 aee 197 334 52 13 6 18 _ a 60 195 304 4S 13 7 17 - a70 229 2SO 46 11 8 16 - 64 222 255 44 11 9 16 - 92 192 229 45 10 10 16 - S9 188 212 41 10 11 20 _ 1Q5 184 137 37 10 12 28 - 124 186 181 37 11 13 22 - 141 164 16S 35 11 14 21 - 210 186 154 34 11 15 20 - 310 184 144 32 12 16 19 _ 363 227 135 30 13 17 19 - 431 237 130 37 18 18 IS - 395 307 123 46 16 19 25 - 307 324 121 51 IS 20 27 - 268 435 132 44 16 21 26 _ 232 491 123 37 14 22 25 - 222 459 114 31 13 23 27 - 229 348 105 33 13 24 30 - 239 419 100 59 13 25 26 - 239 523 99 59 12 26 26 _ 212 600 92 42 15 27 27 _ 277 609 8S 26 12 OQ _ 483 to 33 403 80 20 12 29 31 _ 539 341 74 16 12 30 _ 586 439 70 15 13 30 ~ 31 31 - 5S2 67 14 " Second- Runoff in Month fcot-days Maximum Minimum Mean acre-feet

October...... 705 33 16 22.7 1,400 November 1-5 ...... 172 40 28 34.4 341 December ...... Calendar year ...... January...... _ _ _ _ _ February ...... _ _ _ _ _ March...... _ _ _ _ _ April ...... _ _ . _ _ May...... 7,144 586 50 230 14,170 June ...... 9,664 614 164 322 19,170 July...... 5,795 447 67 187 11,490 August ...... 1,246 63 14 40.2 2.470 September...... 382 IS 10 12,7 75S Water year ...... '...... - - - - - a No gage-height record; discharge computed on basis of weather records Time bas is; Mountain war time* To convert war time to standard time, 156 GREEN RIVER BASIN

Little Sandy Creek near Elkhorn, Wyo.

Location.- Water-stage recorder, lat. 42°32', long. 109°13', In sec. 35, T. 30 N., R. 104 W., 7 miles northeast of Elkhorn. Drainage area.- 20.9 square miles. Records available.- July 1939 to September 1944 (no winter records 1942-44). Extremes.- Maximum discharge during year, 230 second-feet June 26 (gage height, 4.25 reet;; minimum dally recorded, 1.8 second-feet Sept. 29, but probably less during period of ice effect. 1939-44: Maximum discharge, that of June 26. 1944; minimum discharge observed, 0.9 second-foot Jan. 4, 1940 (discharge measurement), but less during period of ice effect. Remarks.- Records good except those for period of no gage-height record, which are fair, continental Divide ditch diverts water to North Platte River Basin (Lander Creek) and two other small diversions above station.

Discharge, in second-feet, water yesr October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.6 7.8 a!6 140 112 18 e.o Z 4.4 1)6. 4 a!6 122 US 17 6.6 3 4.3 b6.4 a!6 99 10S 16 6.8 4 4.4 7.6 a!6 82 101 15 . 6.0 5 4.6 6.2 a!7 71 90 13 5.2 6 4.1 _ a!8 65 88 14 4.4 7 4.0 _ a20 75 82 13 3.8 4.0 _ 24 77 71 13 3.0 Q 3.6 _ 27 71 65 13 2.5 10 3.6 - 24 68 63 12 2.3 11 4.8 _ 28 63 61 12 2.9 12 5.4 _ 32 63 55 13 2.3 13 5.0 _ 38 65 49 13 2.8 14 4.4 _ 47 65 47 12 2.5 15 4.3 - 57 62 47 12 2.5 16 4.3 _ 58 73 44 10 2.6 17 4.1 _ 66 95 43 11 2.0 lp _ 2.6 AO 4.1 57 S3 41 11 19 5.4 _ 44 76 40 11 2.9 20 6.0 - 42 100 41 9.6 2.6 21 5.8 _ 42 130 38 10 2.4 22 7.1 _ 44 131 37 11 2.3 6.0 _ 49 104 35 11 2.2 23 - 2.2 O-*&<* 6.2 52 115 32 11 25 5,8 - 52 149 31 10 2.3

OR 6.2 _ 43 16S 28 9.9 2.0 CD 6.9 _ 52 155 26 9,6 1.9 27 6.8 _ 59 95 23 9.3 2.0 28 7.1 _ 66 82 20 8.8 1.8 29 7.1 _ 89 105 20 8.8 2.3 30 " 31 6.6 " 122 19 8.3

Second- Runoff in Monttf foot-clays Maximum Minimum Mean acre-feet October...... '...... 160.3 7.1 3.6 5.17 31S November 1-5 ...... 34.4 7.8 6.2 6.88 68 December...... Calendar year ...... - - - - - ~ January ...... February _ _ _ ^ March...... _ _ _ _ _ April ...... _ . _ _ _ Haymay ...... 1,333 122 16 43.0 2,640 June ...... 2,849 168 62 95.0 5,650 July...... 1,675 118 19 54.0 5,320 August ...... 366.3 18 8.3 11.8 727 September...... 95.6 8.0 1.8 3.19 190 Water year ...... - - - - - a Ho gage-height record; discharge computed on basis of weather records and records for on nearby streams. b Stage-discharge relation affected by ice. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 157

Blacks Forte near Mlllburne, wyo.

Location.- Water-stage recorder, lat. 41°03', long. 110°34', In sec. 35, T. 13 H., R. 117 w., 3 miles downstream from Little West Forte, 4$ miles north of Utah-Wyoming state line, and 15 miles southwest of Mlllburne. Drainage area.- 156 square miles. Records available.- July 1939 to September 1944 (no winter records 1942-44). Extremes.- mxlmum discharge during year, 1,960 second-feet June 26 (gage height, 3.46 feet), from rating curve extended above 1,000 second-feet; minimum dally, 28 second- feet Nov. 5, but probably less during period of no record. 1939-44: mxlmum discharge, that of June 26, 1944; minimum observed, 17 second- feet Jan. 24, 1940 (discharge measurement), but probably less during period of Ice effect. Remarks.- Records fair. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 36 30 _ 1,050 S25 12S 46 2 36 b30 - 908 884 119 46 3 36 b30 - 671 825 113 45 4 34 1)30 _ 53S 727 111 45 5 34 b28 - 470 629 106 44 6 34 b30 _ 538 550 103 42 7 34 b39 - 713 49S 9S 44 8 36 b37 - 562 443 95 42 9 36 b35 _ 664 405 9S 40 10 36 1)36 - 520 3SO 93 40 11 44 «b3S _ 538 342 88 40 12 4S - - 594 304 85 39 13 3S . _ 657 284 S3 39 14 45 - - 713 276 80 36 15 42 - - 797 262 78 36 16 45 _ _ 769 256 76 36 17 44 - - 657 242 73 34 18 39 _ - 664, 239 76 3S 19 50 . 448 839 235 73 46 20 36 - 360 924 252 6S 39 21 44 _ 360 964 239 66 36 22 36 _ 526 825 222 64 36 - 23 36 - 685 825 215 61 36 24 39 . 657 892 205 59 36 25 40 - » 629 980 186 59 34 26 44 608 1,460 173 55 34 27 45 _ 762 860 167 55 33 28 52 _ 853 713 155 53 33 29 46 972 790 152 50 36

Blacks Fork near Urle, Wyo.

Location.- Water-stage recorder, lat. 41°21', long. 110°20', In sec. 24, T. 16 N., R. 115 W., 2 miles downstream from Quartz Creek and 2i miles north of Urie. Drainage area.- 261 square miles. Records available.- August 1913 to September 1924 (no winter records). October 1937 to September 1944. Extremes.- Maximum discharge during year, 1,110 second-feet June 27 (gage height, 6.26 reet;, from rating curve extended above 600 second-feet; minimum daily, 1.2 second- feet Sept. 8-10. 1913-24, 1937-44: Maximum discharge observed, 2,680 second-feet June 20, 1917 (gage height, 4.72 feet, site and datura then in use); minimum daily, 0.2 second-foot Sept. 2, 3, 1939. Remarks.- Records fair except those for period of ice effect or no gage-height record, which are poor. Diversions above station for irrigation.

Discharge, in seoond-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3.4 9.5 9.0 14 16 26 223 127 564 311 8.5 2.0 2 3.4 6.9 11 14 20 26 234 116 ' 510 323 6.9 1.4 3 3.7 6.5 bll 14 21 27 276 98 406 328 5.7 1.5 4 3.7 6.9 bll 13 21 28 271 85 268 311 4.5 1.5 5 3.9 7.3 bio 12 22 26 253 90 212 279 4.2 1.4 6 3.9 9.0 big 13 23 26 217 110 181 191 3.9 1.4 7 3.9 8.1 b!4 11 27 27 175 129 201 175 3.7 1.4 8 4.2 7.7 b!4 11 27 28 134 110 230 89 3.1 1.2 9 3.9 7.3 13 11 24 29 110 110 172 52 2.8 1.2 10 3.9 7.3 *12 11 21 32 111 158 186 43 2.5 1.2 11 5.3 *7.3 13 11 20 30 121 219 154 26 2.5 3.1 12 5.7 7.7 13 12 20 32 137 313 154 IS251 2.3 5.3 13 4.5 7.7 13 13 20 29 108 428 178 2.3 4.5 14 4.5 6.9 14 13 20 27 92 564 2o3 14 2.0 4.2 15 4.5 6.1 14 13 20 30 65 757 219 14 2.5 3.7 5.3 6.5 14 14 20 32 77 799 226 12 1.7 4.2 5.3 6.9 14 15 19 35 77 855 201 13 2.5 3.9 4.9 7.7 14 16 19 32 79 666 177 14 3.7 3.9 13 9.0 13 17 19 35 65 510 2oe 14 3.4 4.5 20 7.7 12 13 17 19 38 71 414 276 36 3.1 4.5 6.9 12 14 16 20 42 79 360 347 34 3.4 4.8 6.9 11 14 16 22 42 75 412 285 20 3.1 4.2 6.9 12 14 16 24 44 84 624 242 15 2.8 4.2 6.5 12 14 16 *26 42 102 654 259 * 14 2.5 4.5 25 6.5 12 14 16 29 «42 108 576 313 16 3.1 5.3 26 6.9 11 14 72 97 344 636 12 2.8 4.9 S>7 7.3 11 13 15 24 86 103 391 764 10 3.1 4.5 28 114 422 380 9.0 2.8 4.9 29 9.0 12 12 14 24 45 140 510 323 8.1 2.8 4.9 30 11.0 13 1£ 14 69 144 546 294 12 2.8 7.7 31 9.0 15 15 - 212 " 555 " 13 2.3 " Second- Runoff in Month foe t-days Maximum Minimum Mean ao re- feet

6.1 9.04 538 December ...... 400 15 9.0 12.9 793 Calendar year 1943 ...... 17,048.5 588 .7 io.Y 33,820 433 17 11 14.0 859 637 29 16 22.0 1,260 March...... 1,351 212 26 43.6 2,680 April...... 3,942 276 65 131 7,820 Unv 12,052 855 85 389 23,900 8,769 764 154 292 17,390 2,451.1 328 8.1 79.1 4,860 103.3 8.5 1.7 3.33 205 September...... 105.3 7.7 1.2 3.51 209 Water year 1943-44 ...... 30,698.6 855 1.2 83.9 1 60,880 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- No gage-height record Dec. 9 to Mar. 24 (stage-discharge relation affected by ice during o¥"E oT period?; discharge computed on basis of 2 discharge measurements and weather recor Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 159 Blacks Pork near Lyman, Wyo.

Location.- Water-stage recorder, lat. 41°27', long. 110°10', In sec. 21, T. 17 N., R. 113 W., 4 miles downstream from Cottonwood Creek and 12 miles northeast of Lyman. Drainage area.- 821 square miles. Records available.- October 1937 to September 1940, October 1941 to September 1944. Extremes.- Maximum discharge during year, 1,800 second-feet Apr. 5 (gage height, 5.60 reet), from rating curve extended above 1,400 second-feet; minimum dally, 2.8 second- feet Sept. 10: 1937-40, 1941-44: Maximum discharge, 1,980 second-feet May 27, 1942 (gage height, 5.64 feet), from rating curve extended above 1,400 second-feet; no flow Aug. 8, 15-22, 1940. Remarks.- Records good except those for period of Ice effect or no gage-height record, wnicn are poor. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 s.4 31 25 26 35 4S 500 460 1,070 590 30 4.4 2 e.4 30 27 as 37 49 880 410 1,190 575 22 3.6 3 e.9 31 23 29 3S 50 *969 370 1,080 570 IS 3.2 4 S.9 26 2S 28 39 52 1,090 350 805 540 14 3.0 5 S.4 2S 27 86 41 54 1,520 330 600 505 13 3.0 6 8.4 30 26 29 42 56 1,300 450 470 376 13 s;2 7 S.4 39 27 2S 42 56 1,100 510 560 325 11 3.2 8 S.4 37 28 26 42 56 seo 410 620 830 10 3.0 9 e.4 34 26 24 42 56 700 410 700 159 8.7 2.9 10 e.4 31 *24 24 36 5S 750 440 700 140 8.1 2.8 11 12 32 23 25 35 53 320 525 600 38 7.2 2.9 12 17 *32 23 37 36 58 S60 590 590 80 6.9 3.2 13 12 32 ' 2624 23 36 58 700 730 590 60 6.3 4.9 14 9.5 30 28 36 57 450 914 660 50 5.7 5.5 15 S.9 34 24 30 36 56 330 1,170 610 44 5.5 5.2 16 S.4 30 24 32 36 64 360 1,370 535 37 5.7 4.6 17 8.4 30 25 33 36 62 370 1,490 545 40 5.5 4.6 18 S.4 31 26 33 34 60 370 1,420 465 45 5.5 5.5 19 206 30 27 34 33 66 320 930 455 47 6.6 6.0 20 96 31 26 33 32 72 340 865 475 115 6.3 6.3 21 54 31 30 33 -33 SO 380 710 590 105 5.5 6.3 22 43 30 29 33 35 82 370 660 600 70 . 5.5 6.0 23 23 30 23 33 38 90 350 845 520 54 5.7 6.0 24 25 29 28 33 *42 88 420 1,170 510 47 5.5 6.0 25 24 30 28 32 47 «86 440 1,110 465 52 5,S 6.3 26 23 27 SB 31 46 120 390 845 700 45 4.9 6.6 27 24 26 26 31 45 170 410 700 1,320 33 4.9 6.6 28 24 27 23 31 45 130 460 785 398 29 4.9 6-. 6 29 29 29 25 31 46 94 500 90S 690 26 4.6 6.9 30 53 30 23 32 110 540 1,020 585 37 4.1 25 31 41 27 33 - 300 " 1,070 " 39 4.1 " Second- Runoff in Month fcot-deys Maximum Minimum Mean acre-feet October...... S39.6 ' 206 8.4 27.1 1,670 November...... 920 39 26 30.7 1,820 December ...... 816 30 23 26.3 1,62O Calendar year 1943 ...... 39,120.3 1,310 4.1 107 77,590 January...... 924 34 24 29.3 1,830 February...... ,....'...... 1,121 47 32 38.7 2,220 March...... *2,496 300 48 30.6 4,950 April ...... 18,869 1,520 320 629 37,430 May...... 24,037 1,490 330 775 47,680 June ...... 20,448 1,320 455 662 40,560 July...... 5,153' 590 26 166 10,220 August ...... 264.3 30 4.1 3.52 524 September...... 163.3 25 2.8 5.44 324 Water year 1944 ...... 76,053.1 1,520 2.3 203 150,900 » Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Nov. 11-14, Nov. 23 to Dec. 10. No gage-height record Dec. 11 to Apr. 2 (stage-discharge relation probably affected by ice during most of period); discharge computed on basis of 2 discharge measurements and weather records. Ho gage-height record Apr. 6 to May lo, July 10 to Aug. 4; discharge computed on basis of record for station near IJrie. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 160 GREEN RIVER BASIN

East Fork of Smith Fork near Robertson, Wyo.

Location.- Water-stage recorder, lat. 41°03', long. 110°24', on west line of eec. 4, T. liJ N., R. 115 W., 1 mile upstream from Gilbert Creek and 11 miles southeast of Robertson. Drainage area.- 53.0 square miles. Records available.- July 1939 to September 1944 (no winter records 1942-44). Extremes.- Maximum discharge during year, 644 second-feet June 26 (gage height, 3.21 reet), from rating curve extended above 370 second-feet; minimum observed, 6.5 second- feet Dec. 10 (discharge measurement), but may have been less during, period of no record. 1939-44: Maximum discharge, that of June 26, 1944; minimum observed, 3.0 second- feet Jan. 23, 1940 (dlecharge measurement), but may have been less during period of Ice effect. Remarks.- Records fair. No diversion above station.

Discharge, in aecond-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 12 b!3 _ 347 314 56 17 Z 11 b!2 1 e - 2S1 343 56 15 3 11 b!2 - 216 324 53 15 4 11- b!2 _ 173 278 51 15 5 11 13 1 - 157 239 47 15 6 11 12 _ 192 207 44 14 7 9.8 bll - 229 190 42 14 a 9.6 11 ( ' .- 180 166 40 13 9 9.6 11 _ 222 157 41 13 10 9.5 11 } («) - 16S 150 40 13 11 11 *11 _ _ 190 136 3S 12 12 13 11 - - 210 126 36 12 13 12 11 - - 222 117 34 12 14 13 10 - _ 256 110 32 12 15 12 9 - - 292 112 29 11 16 12 _ _ 260 106 28 11 17 12 - - 239 101 27 11 18 11 1- - - 225 97 27 12 19 15 _ - 267 94 28 13 20 15 - 119 321 119 24 12 21 b!4 _ 110 324 140 23 11 22 b!3 1 S 5 _ 138 285 10S 22 10 23 b!2 f s.o _ 190 274 99 21 10 24 b!2 _ 195 292 110 19 ,10 25 b!2 ' - 175 317 S8 19 10 26 14 _ 159 5O4 76 IS 10 27 14 I . 210 358 71 25 9.8 28 16 V 0 _ 232 256 6S 24 9.S 29 15 _ 288 310 66 21 10 30 14 1 _ 328 303 66 20 13 31 b!3 - - 347 - 62 IS Second- Runoff in Month foot-days Maximum , Minimum Mean acre feet October...... 380. 9 16 9.5 12.3 756 November...... 297.5 13 9.92 590 December 1-10 ...... 75 - 7.50 149 Calendar year ...... _ _ _ _ ^ January ...... _ _ _ _ _ February...... _ _ _ _ _ March...... _ _ _ _ _ April...... _ _ _ _ _ , Hay 80-31 ...... 2,491 347 110 208 4,940 June ...... 7,870 504 157 262 15,610 Jnly...... 4,440 343 62 143 6,610 August ...... 1,003 56 18 32.4 1,990 September...... 365.6 17 9.S 12.2 725 Water year ...... - - - - - « Winter discharge measurement; made on this day. b Stage-discharge relation affected by Ice. Note.- Ho gage-height record Nov. 8 to Dec. 10 (stage-discharge relation probably affected by ice for entire period)5 discharge computed on basis of 2 discharge measurements and weather records. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 161

Smith Fork at Mountalnview, Wyo.

Location.- water-stage recorder, lat. 41°16', long. 110°20', In sec. 23, T. 15 N., R. 115 w., at highway bridge in southwestern edge of Mountalnview. Drainage area.- 192 square miles. Records available.- October 1941 to September 1944. " - Extremes.- Maximum discharge during year, 598 second-feet May 17 (gage height, 3.38 feet), rrom rating curve extended above 430 second-feet; minimum dally, 8.5 second-feet Oct. 1941-44: Maximum discharge, 946 second-feet May 24, 1942 (gage height, 3.96 feet), from rating curve extended above 425 second-feet: minimum dally, 4.8 second-feet Nov. 7, 13, 1942. Remarks.- Records good except those for period of ice effect or no gage-height record, wnich are fair. Many diversions above station for Irrigation.

Discharge, in second-feet-, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 12 20 " b!4 11 11 14 b46 75 500 168 13 13 2 12 18 b!2 11 18 14 bSO 72 465 154 13 13 3 10 19 b!3 11 12 14 »b62 59 375 161 13 13 4 10 22 13 11 18 14 100 46 870 145 13 15 5 10 23 12 10 12 14 145 54 21S US 13 16 6 10 22 13 12 13 14 113 71 200 89 15 15 7 10 22 13 11 13 15 90 74 343 65 14 15 8 10 18 13 11. 13 15 75 77 351 48 13 IS 9 9.5 17 11 10 12 15 64 108 267 35 13 13 10 9.5 19 *10 10 12 15 65 210 264 29 13 13 11 10 *23 12 1Q 11 15 75 216 212 25 13-- 13 12 11 23 11 10 11 15 75 236 - 215 23 13 13 13 9.5 23 11 11 11 15 64 297 218 21 13 13 14 8.5 22 11 11 11 14 54 386 215 le 13 13 15 8.5 20 12 11 11 15 38 470 220 18 13 18 18 ' 16 9.5 17 12 11 11 15 44 495 208 13 12 17 10 15 12 12 11 16 43 545 178 16 13 12 18 10 17 12 12 10 17 50 375 156 17 13 18 19 19 17 11 12 10 17 39 301 152 20 13 13 20 17 17 11 Xl 10 17 44 247 175 60 13 14 21 14 15 12 12 11 16 45 195 205 59 13 13 22 12 15 12 11 12 16 46 233 175 35 13 13 23 12 17 12 11 12 16 51 420 154 24 13 13 24 10 16 11 11 «13 17 53 495 143 25 14 13 25 12 15 11 11 14 *19 53 411 145 27 14 13 t 26 / 12 b!4 11 11 13 22 46 303 274 21 14 13 27 12 b!4 11 11 13 26 51 351 367 18 14 12 28 16 b!4 10 11 13 20 54 398 200 16 14 18 29 20 b!4 11 11 13 15 74 430 170 15 13 12 30 20 b!5 11 11 . - 19 77 460 182 14 13 13 31 IS - 12 11 - b25 - 470 - 13 13 Second- Runoff in Mcnth f cot-days Maximum Minimum Bean acre-feet

October...... 374.0 20 8.J 12.1 rfAnf**6 November...... 543 23 14 IS* 1 1,080 December...... 363 14 10 11.7 720

Calendar year 1943 ...... 14,964.3 465 5*1 4rl 1 OQ i/PQ January...... 342 12 10 11.0 678 February...... 343 14 10 11.8 680 March...... 511 26 14 16.5 1,010 April...... 1,885 145 38 62.8 3,740 Bay...... 8,579 545 46 S77 17,020 June...... ~...... 7.S17 500 143 241 14,310 July...... 1,515 168 13 4S.9 3,000 August ...... 411 15 13 13.3 815 September...... 395 16 12 13.2 783 Water year 1943-44 ...... 22,478.0 545 8.E 61.4 44,580 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- Ho gage-height record Dec. 4 to Mar. 30, Apr. 4 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 3 discharge measurements and weather records. 162 GREEN RIVER BASIN

West Fork of Smith Fork near Robertson, Wyo.

Location.- Water-stage recorder, lat. 41°01', long. llo°29', In sec. 15, T. 12 H., R. 116 to., tnree-quarters of a mile downstream from Archie Creek and 13 miles southwest of Robertson. Drainage area.- 37.2 square miles. Records available.- July 1939 to September 1944 (no winter records 1942-44). Extremes.- Maximum discharge during year, 340 second-feet May 22 (gage height, 2.40 feet), rrom rating curve extended above 190 second-feet; minimum dally, 1.0 second-foot Sept. 15, and probably less during winter. 1939-44: Maximum discharge, 540 second-feet May 25, 1942 (gage height, 2.76 feet), from rating curve extended above 190 second-feet; minimum, 0.2 second-foot Aug. 13, 1940, Feb. 25, 1941 (discharge measurement), and probably less during winter. Remarks.- Records good except those for period of ice effect, which are fair. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.8 bS.S _ 192 45 3.4 1.2 2 1.8 3.5 - 175 41 3.2 1.3 3 l.S 1)3.4 - 123 40 3.0 1.4 4 1.8 b3.4 _ 101 34 2.9 1.4 5 1.9 3.4 - 92 29 2.9 1.4 6 1.9 b3.8 _ 112 24 2.9 1.3 7 1.8 b3,7 _ 175 21 2.4 1.2 8 1.9 b3.6 - 123 18 2.3 1.2 9 1.9 3.4 . 129 17 2.4 1.3 10 1.9 3.2 - 94 16 2.3 1.1 11 3.0 *b2.8 _ 90 15 2.0 1.1 12. 3.4 - - 86 13 1.9 1.2 13 2.8 - - 86 12 1.7 1.2 14 3.2 - - 86 11 1.7 1.1 15 2.9 - - 84 11 1.7 1.0 16 2.9 _ . 76 9.6 1.6 1.2 17 2.8 - - 67 S.3 1.8 1.1 18 2.6 - - 57 7.S 2.0 1.5 19 4.7 _ 115 62 4.7 1.9 1.8 20 5.3 - 90 68 15 1.7 1.6 21 b4.8 _ 103 64 16 1.7 1.4 22 b4.1 - 1S9 56 9.2 1.8 1.3 23 b3.7 _ 250 51 7.0 1.6 1.3 24 b3.6 _ 226 51 12 1.5 1.4 25 b3.6 - 175 54 7.4 1.6 1.4 26 4.1 _ 161 101 5.9 1.5 1.4 27 4.1 - 196 59 5.3 1.5 1.4 28 5.6 - 210 49 4.7 1.4 1.5 29 4.7 - ' 210 4S 5.3 1.3 1.6 30 4.1 - 214 45 4.4 1.4 3.0 31 b3.8 ~ 192 3.8 1.4 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 98. 3 5.6 1.8 3 IV 195 November 1-11...... 33.0 3 .S 2.8 3.45 75 December ...... Calendar year ...... _ _ _ _ _ January ...... February ...... March ...... _ _ _ _ w April ...... _ _ _ . ^ Bay 19-31 ...... 2,321 250 90 1V9 4,680 June ...... 2,656 192 45 88.5 5,270 July...... 473.4 45 3.8 15.3 939 August ...... 62.4 3.4 1.3 2.01 184 September...... 41.3 3.0 1.0 1.38 82 Wster year ...... - - - - - * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. t'ime basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 163

Henrys Fork near Lonetree, Wyo.

Location.- Water-stage recorder, lat. 41°00', long. 110°17', in SEi sec. 20, T. 12 N., R. iJ-4 w., at Utah-Wyoming State line, half a mile downstream from West Fork and 8 miles southwest of Lonetree. Drainage area.- 55.2 square miles. Records available.- April 1943 to September 1944 (no winter records). Extremes.- Maximum discharge during year, 822 second-feet June 26 (gage height, 3.78 feet), from rating curve extended above 200 second-feet; minimum daily. 9.4 second- feet Sept. 15-17, 22-27, but probably less during period of no record. 1943-44: Maximum and minimum discharges, those of 1944.' Remarks.- Records gopd except those for period of ice effect, which are poor. One diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July- Aug. Sept.

1 11 b!9 _ 386 270 52 14 Z 11 bl8 - 321 305 48 14 s 10 b!6 _ 255 272 46 14 4 10 D13 _ 200 236 44 14 5 10 b!2 - 179 208 40 13 \'38 6 10 bll _ 220 194 13 7 10 blO _ 265 179 56 12 8 10 blO - 213 163 34 12 9 9.8 bll - 275 163 34 12 10 9.8 »b!5 - 197 161 34 11 ' 11 11 _ , _ 220 149 31 11 12 12 - 98 245 129 30 10 13 10 - 110 255 127 28 10 14 11 142 285 125 27 9.9 15 11 - 200 285 116 26 9.4 16 11 _ 236 275 116 25 9.4 17 11 - 252 252 116 24 9.4 18 10 - 204 236 112 24 9.9 19 13 - 176 268 110 24 11 20 12 - 136 303 122 22 11 21 14 _ 118 332 129 22 10 ZZ 14 _ 158 292 114 22 9.4 23 16 ~» 245 283 114 20 9.4 24 12 239 306 116 19 9.4 25 12 - 207 342 110 19 9.4 26 12 . 220 618 93 18 9.4 27 13 - 321 310 78 28 9.4 28 14 - 357 252 68 17 9.9 29 14 - 364 283 63 16 10 30 13 _ 408 272 58 15 13 31 13 - 378 - 54 15

Second- Runoff in Month foot-days Maximum Minimum Mean ao re-feet

October...... 360.6 16 9 .00 715 -to 11*6 November 1~10 ...... 135 J.W 10 13.5 268 December...... Calendar year ...... _ _ _ _ _ January ...... *...... February...... ______March...... _ _ _ _ _ April...... _ _ _ _ May 12-31 ...... 4,569 408 98 22S 9,060 June ...... 8,427 618 179 281 16,710 July...... 4,370 305 54 141 8,670 August ...... 868 52 15 28.0 1,720 September...... 329.3 14 9.4 11.0 653 Water year ...... - - - - - * Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Time basis: Mountain war time. To convert »ar time to standard time, subtract 1 hour. 164 GREEN RIVER BASIN

Henrys Pork near Burntfork, Wyo.

Location.- water-stage recorder, lat. 41°02 t , long. 110°03', in sec. 4, T. 12 N., R. 112 w., at Uinta-Sweetwater county line, 2i miles upstream from Burnt Pork and 2f miles west of Burntfork school. Drainage area.- 242 square miles. Records available.- October 1943 to September 1944. Extremes.- Maximum discharge during year, 1,040 second-feet June 26 (gage height, 4.76 reet), from rating curve extended above 400 second-feet; minimum dally, 12 second-feet Sept. 15. Remarks.- Records good except those for period of ice effect or no gage-height record, wnicn are fair. Many small diversions above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 IS SO 31 23 19 19 194 120 646 505 58 18 2 17 42 31 23 20 19 250 114 595 510 54 17 3 16 61 30 23 20 20 348 114 475 535 50 16 4 16 49 23 22 21 20 520 100 357 445 47 18 5 16 46 89 21 21 20 405 105 293 343 46 18 6 16 36 29 22 21 20 314 123 314 874 41 17 7 al6 32 29 22 21 21 206 149 435 235 38 16 8 al8 35 26 21 21 22 143 156 405 197 34 15 9 a!8 41 21 21 21 23 124 152 410 161 35 14 10 al8 42 22 20 20 24 118 174 410 149 37 14 11 al9 41 24 20 20 24, 128 164 352 138 39 14 12 a!9 38 25 20 18 24 143 154 366 128 30 14 13 a!8 38 25 20 IS . 24 124 179 357 112 28 14 14 le 35 25 20 18 25 107 183 390 101 26 13 15 IS 33 25 21 18 26 86 . 242 440 107 86 12 16 18 32 24 21 18 26 -es 310 425 103 84 13 17 IS *30 24 21 IS 26 32 385 385 S3 24 14 18 17 36 24 22 IS 27 83 318 343 76 26 14 19 39 34 24 22 17 28 77 322 352 74 26 18 20 30 34 24 21 17 30 63 302 415 191 84 18 21 29 30 24 21 17 33 85 231 475 188 24 16 22 35 31 24 22 16 34 77 203 465 134 26 14 23 28 33 , 24 22 *16 35 79 232 410 116 24 14 24 26 30 24 22 16 36 96 385 425 149 23 14 25 31 35 24 22 16 37 96 326 485 143 26 14 26 30 32 23 22 16 40 63 273 755 109 22 14 27 29 32 22 21 16 44 101 314 655 86 21 15 28 30 32 22 21 17 53 112 400 339 74 20 15 29 48 32 22 21 18 51 120 505 446 69 IS 16 30 40 31 23 20 _ 56 134 585 515 67 IS 20 31 30 - 23 19 - 130 ~ 630 ~ 64 18 ~ Seoond- Runoff in Month foot-days Maxima Minium* Mean acre-feet October...... 739 48 16 23.8 1,470 November...... 1 '775072 61 20 35.7 n \ZQ December...... 31 21 25. 0 1*540 Calendar year 1943 ...... _ _ _ _ _ ff* January ...... 659 GO 19 21.3 1,310 February 533 21 16 18.4 1,060 March...... 1,017 xou |«f\ 19 32.3 2,020 toil...... 4,601 520 77 153 9,130 s^, ...... 3,015 630 100 2S9 15,900 June ...... 13,143 755 O^fi 4S8 26,070 July...... 64 183 JJ.,250 5,671 535 » Q AUKUSt 946 53 J.O 30.5 1,880 September...... 459 20 12 15.3 910 Water year 1943-44 ...... 37,630 755 12 103 74,670 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on baala of records for stations on nearby streams. Hpte.- Stage-discharge relation affected by Ice HOT. 7-8, HOT. 27 to Bar. 26. Time baalai Mountain war time. To convert war time to standard time, aubtract 1 hour. OREEN RIVER BASIN 165

Henrys Fork at Linwood, Utah

Location.- Water-stage recorder, lat. 41°00', long. 109°39', In sec. 23, T. 12 N.,'R. 109" W., 200 feet north of Wyoming-Utah State line at Linwood. Datum of gage is 5,992.57 feet above mean sea level, adjustment of 1912. Temporary staff gage established at site 250 feet upstream at different datum Aug. 24, 1944. Drainage area.- 531 square miles. Records available.- October 1928 to September 1944. Records of monthly'discharge prior to October 19S8 have been republished, with some additions, in Water-supply Paper 918. Average discharge.- 16 years, 78.1 second-feet. Extremes.- Maximum discharge during year, 990 second-feet June 27 (gage height, 3.92 feet), from rating curve extended above 450 second-feet; minimum daily, 3.7 second- feet Aug. 19. 1928-44: Maximum discharge, 6,750 second-feet Aug. 3, 1936 (gage height, 7.19 feet, from floodmarks), by slope-area method; no flow several days In 1934, 1935, 1939, 1940. Remarks.- Records fair. Qage read twice dally Oct. 5 to Dec. 11, Aug. 16 to Sept. 30. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 19 69 b42 37 40 41 300 140 727 562 68 9.0 2 IS 72 b42 40 40 42 524 114 738 524 49 9.8 3 IB 51 b42 40 40 44 684 122 650 684 45 9.8 4 13 51 b40 35 42 43 705 106 507 485 38 11 5 16 56 b40 32 43 42 »420 102 405 385 34 11 6 16 63 Ml 40 44 41 350 118 340 295 31 11 7 17 MB b41 36 , 45 41 235 135 441 245 29 7.0 S 19 87 b41 32 44 43 190 140 516 215 21? 9.0 9 SO 94 »bS6 33 43 45 145 135 468 170 27 11 10 20 «84 b27 35 39 47 150 145 507 155 27 9.0 11 24 72 b31 37 37 45 155 155 400 145 27 9.0 ie 24 69 37 38 38 43 155 155 400 135 27 7.4 13 22 69 40 40 38 45 180 ISO 385 122 25 7.S 14 22 66 43 41 38 44 150 215 385 110 24 7.0 IS 22 63 44 42 38 45 94 275 425 106 24 7.0 16' 7.4" 24 56 45 44 38 46 87 365 . 420 106 29 17 24 53 46 41 3S 48 37 452 380 94 13 7.0 18 24 53 45 45 36 48 94 436 375 SI 6.4 7.4 19 24 63 43 47 34 48 84 380 340 75 3.7 15 20 24 51 43 42 32 50 S4 441 380 98 4.0 20 21 25 51 42 40 35 52 90 345 458 155 9.4 19 22 85 53 42 40 »37 52 90 290 463 122 4.6 16 23 S6 45 43 42 39 54 84 296 380 98 16 14 24 is 51 43 44 41 54 90 441 355 98 9.4 15 25 42 51 43 43 42 54 102 446 395 114 9.0 14 26 33 . 53 43 42 39 50 94 380 600 110 10 14 27 31 45 39 43 37 50 90 350 832 94 11 14 28 31 b45 36 42 36 62 186 420 410 81 11 *5 29 34 b45 34 39 38 60 165 518 420 75 8.6 17 30 66 b43 40 36 _ 100 19S 622 551 69 11 28 31 49 - 42 38 - 170 727 63 9.0 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre- feet

Ootober...... 807 66 16 26.0 1,600 November 1,752 94 43 58.4 3,480 December ...... 1,246 46 26 40.2 2,470 Calendar year 1945 20,175.5 305 S.'7 55.3 40,020 January...... 1,226 47 32 39.5 2,430 February...... > ...... 1,131 45 32 39.0 2,240 March...... 1,649 170 41 53.2 3,270 April ...... 5,879 705 34 196 11,660 May...... 9,145 727 102 295 16,140 June ...... 14,055 S32 340 468 27,680 July...... 5,771 584 63 1S6 11,450 August ...... 657.1 58 3.'r 21.2 1,300 September...... 356.6 2S 7.C) 11.9 707 Water year 1943-44 ...... 43,674.7 832 3.'7 119 86,630 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- So gage-height record Dec. 12 to Mar. 31 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 2 discharge measurements and weather records. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. 166 GREEN RIVER BASIN

Burnt Fork near Burntfork, Wyo.

Location.- Water-stage recorder, lat. 40°57', long. 110°04', In SWi sec. 36, T. 3 N., R. 17 E., half a mile west of Ashley National Forest boundary and 7 miles southwest of Burntfork. Drainage area.- 52.8 square miles. Records available.- April 1943 to September 1944 (no winter records). Extremes.- Maximum discharge during year, 740 second-feet June 26 (gage height, 7.28 feet), from rating curve extended above 200 second-feet; minimum discharge observed, 7.4 second-feet Nov. 15 (discharge measurement), but probably less during period of no record. 1943-44: Maximum and minimum discharges, those of 1944. Remarks.- Records excellent except those for period of Ice effect or no gage-height record, and those above 300 second-feet, which are poor. No diversion or regulation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 15 _ 444 242 55 33 2 15 _ 281 281 58 31 3 15 _ 123 236 65 30 4 14 - 144 189 63 30 5 14 - 132 174 61 29 6 13 _ 158 140 59 28 7 15 > a7.5 _ 204 114 58 27 8 13 169 98 56 28 9 13 ._ 245 96 58 28 10 13 - 177 94 55 28 11 14 _ 192 89 52 27 12 14 52 166 106 49 27 13 14 55 195 S9 47 27 14 13 96 245 82 45 26 15 IS (») 166 239 79 45 26 16 12 - 220 198 72 44 26 17 12 - 174 169 67 43 26 18 11 - 104 142 63 44 28 19 13 - 96 174 65 44 27 20 15 ~ 74 216 81 43 26 21 14 - 62 242 74 42 24 22 13 - 92 204 63 41 23 23 12 - 174 189 70 40 23 24 14 - 198 210 79 40 23 25 11 - 119 268 71 39 22 26 10 _ 108 541 66 37 21 27 10 - 163 271 63 36 16 28 11 213 195 62 36 16 29 11 - 261 248 61 36 16 30 9.8 - 396 25S 60 34 21 31 9.2 "" 408 - 58 33 - Second- Runoff in Month foot-days Maximum Minimum Mean acre- feet

October...... 394.0 15 9.2 12**7 781 November 1-15- ...... 112.5 7.5 223 December...... - - Calendar year ...... _ _ _ _ _ January...... February...... March...... April ...... May 12-31 ...... 3,231 408 52 162 6,410 June ...... 6,639 541 123 221 13,170 July...... 3,184 2S1 58 103 6,320 August ...... 1,458 65 33 47.0 2,890 September ...... 763 33 16 25.4 1,510 Water year ...... - - - - - * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of 1 discharge measurement and wea records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 167

Sheep Creek near Manila, Utah

Location.- Water-stage recorder, lat. 40°53% long. 109°54', In IE4 sec. 28, T. 2 N., RT~IS~E., 350 feet downstream from confluence of North and South Forks and 12 miles southwest of Manila. Drainage area.- 45.9 square miles. Records available.- October 1942 to September 1944 (no winter records In 1943). Extremes.- Maximum discharge during year, 472 second-feet May 16 (gage height, 5.05 feet); minimum daily, 0.3 second-foot Sept. 26-29. 1942-44: Maximum and minimum discharges, those of 1944. Remarks.- Records fair except those for periods of ice effect or no gage-height record, which are poor- One large diversion above station.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.6 0.7 4.4 25 460 83 0.7 0.4 2 .6 1.2 4.2 36 250 91 .7 .4 S .6 1.0 S.2 32 K 180 9S .7 .4 4 .6 .5 6.2 29 190 79 .S .4 5 .6 .5 «8.3 40 180 69 1.5 .5 6 .6 b.5 S.6 50 210 53 1.0 .4 7 .6 b.5 7.6 60 190 37 .S .4 8 .6 b.5 8.6 60 190 26 .7 .4 9 .6 b3.5 10 64 206 20 .8 .4 10 .6 b7.0 10 70 210 17 .8 .4 e 11 .7 b7.0 13 68 190 14 .8 .4 12 .6 b7.0 16 70 170 9.6 .8 .4 13 .6 7.7 17 88 150 7.4 .S .4 14 .6 6.5 14 150 150 6.S .7 .4 15 .6 6.2 12 270 140 6.2 .6 .4 9.0 8 10 12 16 .6 *b6.0 10 346 130 5.3 .6 .4 17 .5 6.B 9.2 280 130 4.2 .6 .4 18 .5 6.6 9.0 190 130 3.4 .6 2.3 19 .7 6.8 9.4 150 125 3.2 .6 16 20 .6 6.7. 9.0 125 120 5.9 .6 5.6 21 .6 6.4 10 ilo 115 4.5 .5 .4 22 .6 6.6 10 170 110 2.7 .5 .4 23 .6 6.6 (*) 10 250 100 3.4 .5 .4 24 .6 6.8 11 300 96 4.0 .5 .4 25 .7 7.0 , 11 280 90 2.1 .5 .4 26 .7 7.0 11 230 84 1.3 .5 .3 27 .7 7.0 13 190 80 1.0 .5 .3 28 .7 7.3 f 14 220 76 1.0 .5 .3 29 .7 7.6 16 280 74 .9 .4 .3 30 .5 8.0 _ 21 400 82 .8 .4 .4 31 .5 - - - 440 - .8 .4 -

Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 18.9 0.7 0.5 0.61 37 November...... 1S2.9 8.0 .5 5.10 303 December...... 279 9 553 Calendar year ...... ^ ...... - - - - - Januarv ...... 248 _ _ 8 492 February...... 200 - - 10 575 March...... 372 12 738 April...... 318.7 21 4.2 10.6 632 May...... 5,071 440 25 164 10,060 June 4,608 460 74 154 9,140 July...... 661". 5 98 .S 21.3 1,310 August ...... 20.4 1.5 .4 .66 40 September...... 34.4 16 .3 1.15 88 Water year 1943-44 ...... 12,074.8 460 .3 33.0 23,950 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Hpte.- Bo gage-height record Hov. 17 to May 15, May 17 to June S, June 10-30. Record for Nov. 17 to Apr. 13 (stage-discharge relation affected by ice during moat of period) computed on basis of 2 discharge measurements and weather records. Discharge for Apr. 14 to May 15, May 17 to June 8, Jane 10-30 computed on basis of records for stations on nearby streams. Time basis: Mountain war time. To convert war tine to standard time, subtract 1 hour. 168 GREEN RIVER BASIN

Yampa River near Yampa, Colo.

Location.- Water-stage recorder, lat. 40°04', long. 107°00', In NWi sec. 12, T. 1 N., R. oe w., a quarter of a mile downstream from Gardner Creek and 7 miles southwest of Yampa. Drainage area.- 39.9 square miles. Records available.- October 1942-to September 1944 (discontinued). Extremes.- Maximum discharge during year, 179 second-feet June 10 (gage height, 1.88 reet;; minimum recorded, 13 second-feet Apr. 23 (gage height, 0.69 foot). 1942-44: Maximum and minimum discharges, those of 1944. Remarks.- Records good except those for periods of ice effect or no gage-height record, wnicn are fair. Flow regulated by Stlllwater Reservoir (capacity, 6,090 acre-feet). TVJO diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 32 28 is 23 is IS 17 IS 119 114 77 29 2 32 27 20 22 18 17 17 IS 114 112 77 28 3 32 26

Location.- Water-stage recorder, lat. 40°17", long. 106°50', In SEi sec. 29. T 4 N R 84 w.» 1 mils upstream from Morrlson Creek and 6i miles east of Oak Creek. Drainage area.- 227 square miles. Records available.- October 1942 to September 1944 (discontinued). Extremes.- Maximum discharge during year, 183 second-feet my 15: maximum gage height, t>.YB reet Apr. 5 (Ice Jam); minimum dally discharge, 18 second-feet Sept. 10, 11. 1942-44: Maximum discharge, 280 second-feet June 2, 1943; maximum gage height, 6.17 feet Mar. 30, 1943 (Ice Jam); minimum dally discharge, that of Sept. 10, 11, 1944. Remarks.- Records excellent except those for periods of Ice effect or no gage-height record, which are fair. Diversions and storage above station for Irrigation (see description for station near Yampa).

Discharge, in seccnd-fset, water year October 1943 to September 1944 Daj Oct. Ncv. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 33 54 31 35 35 45 74 88 77 56 44 28 2 33 54 33 24 36 47 80 92 77 68 44 38 3 32 52 35 22 36 50 86 77 74 64 35 35 4 31 56 34 32 25 56 94 75 84 7S 31 32 5 32 56 35 33 27 60 110 93 81 65 33 22 6 31 54 36 32 29 60 103 99 65 60 35 23 7 30 47 35 31 39 5« 101 116 75 50 46 20 B 30 47 34 20 31 64 106 114 106 43 42 19 9 29 46 33 31 33 62 119 114 75 41 44 19 10 29 54 32 31 34 60 79 137 68 57 42 18 11 *29 55 30 30 35 62 88 123 68 104 40 18 12 33 55 S3 20 32 64 104 121 70 63 39 19 13 32 *54 38 30 *35 66 131 135 68 50 38 30 14 31 S3 30 20 36 *72 79 147 59 48 36 20 15 33 51 31 21 36 6S 72 167 54 48 35 20 16 32 51 39 31 39 58 66 159 53 46 35 30 17 31 51 2S 21 37 58 68 165 50 45 34 31 IB 31 51 38 23 35 58 62 149 44 44 36 21 19 33 50 29 32 36 58 67 129 43 48 74 27 20 35 ' 50 29 22 38 56 65 110 41 53 50 28 21 34 46 28 33 37- 54 63 106 39 65 46 27 22 36 SO 28 22 37 54 *63 110 36 65 45 a24 23 36 50 38 23 38 56 54 114 32 64 44 a23 24 37 46 28 35 41 58 59 135 30 67 40 a24 25 . 40 50 27 35 42 58 59 129 36 81 46 a24 26 40 45 27 24 4S 52 60 110 57 60 44 a 24 27 41 47 36 23 45 58 62 93 59 51 * 40 a25 28 39 41 25 24 43 58 88 92 56 49 37 a25 29 46 38 24 24 42 58 86 102 48 49 34 a25 30 53 35 23 24 _ 64 83 as 51 48 34 a85 31 56 r 23 23 - 72 - 83 - 43 32 -. Second*' Runoff in Month feet-days Maximum Minimum Mean acre-feet

1,085 56 3£» 35.0 2,150 58 3J> 49.6 2,970 December ...... 915 36 2!> 29.5 1,810 Calendar year 1943 ...... 21,851 204 - 59.9 43,340 25 2C> 32.2 1,370 45 2E 35.0 2,010 72 45> 5S.8 3,610 2,420 121 5'I 80.7 4,800 May...... 3,574 167 7e 115 7,090 1,775 106 3C) 59.2 3,520 1,766 104 4]L 57.0 3,500 74 3,490 September...... 683 28 li5 23.8 1,350 Water year 1943-44 ...... 18,493 167 IE} 50.5 36,670 * Winter discharge measurement made on this day. a Mo gage-height record; discharge computed on basis of record for station near Yampa. Sote.- Stage-discharge relation affected by Ice Hov. 3-5, 7-12, 27, 28, De*. 1 to Apr. 6 (no gage- height record Dec. 24 to Jan. 12; discharge computed on basis of weather records). Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 12 170 GREEN RIVER BASIN

Yampa River at Steamboat Springs, Colo.

Location.- Water-stage recorder, lat. 40°29«, long. 106°50', In'sec. 17, T. 6 N., R. 84 W., at Steamboat Springs, a quarter of a mile upstream from Soda Creek. Datum of gage Is 6,696.23 feet above mean sea level, adjustment of 1912. Drainage area.- 604 square miles. Records available.- May 1904 to October 1906, October 1909 to September 1926 (monthly diecnarge only), October 1933 to September 1944 In reports of Geological Survey. May 1904 to October 1906, March 1910 to September 1944 In reports of State engineer. Average discharge.- 37 years, 482 second-feet. Extremes.- Maximum discharge during year, 3,400 second-feet June 9 (gag© height, 5.27 reet); minimum dally, 4.0 second-feet Sept. 10-13. 1904-6. 1909-44: Maximum discharge, 6,820 second-feet June 14, 1921 (gage height, 7.08 feet); minimum dally, 4 second-feet Sept. 8, 1934, Sept. 10-13, 1944. Remarks.- Records excellent above 100 second-feet and good below. Diversions above station for irrigation.

Discharge, in second-feet, water year-October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 68 134 62 90 58 83 136 343 2,430 592 104 33 2 68 113 79 87 60 87 136 361 2,130 548 101 28 3 66 111 81 76 74 92 154 321 1,830 495 90 2S 4 64 131 79 87 74 96 216 278 1,600 445 68 23 5 60 128 79 87 68 106 289 317 1,550 . 425 68 20 6 60 123 94 a94 66 106 334 402 1,580 361 63 15 7 60 101 104 a 86 74 90 289 564 1,920 297 83 15 8 56 90 99 a76 76 111 325 598 2,180 252 87 9.2 9 48 99 96 a64 79 79 379 673 2,530 228 85 6.4 10 47 111 94 a 80 81 76 338 862 2,790 243 85 4.0 11 50 lie 101 aS7 87 90 392 989 2,740 329 79 4.0 12 64 118 96 a 69 85 106 442 1,070 2,430 249 74 4.0 13 68 113 *92 *85 64 111 460 1,260 2,170 207 68 4.0 14 68 113- 83 85 76 160 334 1,450 1,940 181 66 4.8 15 70 111 94 83 79 154 285 1,630 1,860 170 62 -7.2 16 76 101 87 85 144 141 260 1,820 1,760 162 64 S.O 17 72 106 81 90 99 123 253 1,960 1,550 149 62 7.2 18 76 113 85 90 72 126 221 1,540 1,430 1SS 60 12 19 81 106 85 83 81 128 232 .1,460 1,480 123 99 14 20 83 IDS 99 83 87 121 214 1,300 1,470 144 106 20 21 79 106 104 S7 76 123 20S 1,270 1,410 165 90 26 22 79 111 104 79 74 116 201 1,300 1,240 160 83 27 23 SI . 113 101 76 79 113 179 1,580 1,080 152 74 27 24 76 106 96 79 81 126 179 1,990 1,050 181 68 26 25 79 111 96 79 83 123 188 2,030 980 204 70 28 26 83 70 79 76 85 99 204 1,870 987 181 74 30 £7 87 85 113 76 90 113 281 1,940 812 144 68 31 28 94 76 blOO 68 85 106 297 2,180 746 IBS- 52 33 29 104 81 72 72 79 ,104 338 2,380 704 121 30 39 30 12S 72 64 72 ^13 338 8,570 650 11S 36 52 31 134 - 76 76 - 131 2,700 108 34 Seccnd- Runoff in Month foct-days Maximum Minimum Mean acre-feet October...... 2,329 134 47 75.1 4,620 November...... 3 ) 181 134 70 106 6,310 December...... 2,775 113 62 89.5 5,500 Calendar year 1943 ...... 148,256 2,760 41 406 294,100 January ...... 2,547 94 68 82.2 5,050 February ...... 2,316 144 58 79.9 4,590 March...... 3,453 160 76 111 6,850 April...... 8,102 460 136 270 16,070 May...... 41,013 2,700 278 1,323 81,360 June ...... 49,029 2,790 650 1,634 97,250 July...... 7,390 592 108 238 14-, 660 Auguet ...... 2,258 106 30 72.8 4,480 September...... 585.8 . 52 4.C 19.5 1,160 Water year 1943-44 ...... 124,983.8 2,790 4.0 341 247,900 * Winter discharge measurement made on this day. a No gage-height record (stage-discharge relation probably affected by ice most of period); dis- harge computed on basis of weather records, b Stage-discharge relation affected by ice. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 171

Yampa River near Maybell, Colo.

Location.- Water-stage recorder, lat. 40°30', long. 108°02', In sec. 2, T. 6 N., R. 95 vl., 3 miles east of Maybell. Datum of gage Is 5,900.23 feet above mean sea level, datum of 1929. Drainage area.- 3,410 square miles. Records available.- April 1904 to October 1905, June 1910 to November 1912, April 1916 to September 1944. Records of monthly discharge prior to October 1938 have been republlshed, with some revisions and additions, In Water-supply Paper 918. Average discharge.- 28 years (1916-44), 1,622 second-feet. Extremes.- Maximum discharge during year, 9,080 second-feet May 25 (gage height, 7.52 feet); 'minimum dally, 15 second-feet Sept. 24-27. 1904-5, 1910-12, 1916-44: ttaxlmum discharge observed, 17,900 second-feet my 19, 1917 (gage height, 10.4 feet, site and datum then in use, from floodmarks), from rating curve extended above 12,000 second-feet; minimum dally, 2 second-feet July 17-19, 1934. Remarks.- Records excellent except those for period of Ice effect or no gage-height record, which are fair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 128 318 b!61 155 160 £40 382 i.oeo 8,400 2,760 242 6S ? 128 318 b200 165 148 £25 400 1,240 S,200 2,690 218 57 3 132 £90 b!78 170 138 £15 400 1,340 7,730 2,540 198 53 4 132 255 b!63 160 149 £20 376 1,340 7,490 2,310 183 53 5 130 £23 b!68 160 160 250 460 1,090 6,750 2,120 180 50 6 130 250 b£14 165 160 £45 629 1,020 6,600 1,960 172 48 7 1E8 £75 b!94 175 155 £55 897 1,280 5,770 1,900 166 46 n 1E8 245 b207 170 160 £60 832 2,130 6,200 1,600 130 4S q 1E8 207 b£07 165 160 £55 SOO 2,410 6,820 1,360 127 48 10 128 £14 b£S2 170 170 £48 897 2,820 7,180 1,170 134 46 1S5 228 b!34 179" 180 £25 880 3,730 7,590 1,080 138 45 148 £65 b!78 184 160 £20 872 4,040 7,800 1,030 144 40 148 £70 b£10 190 150 £70 1,050 4,380 7,640 972 141 39 157 £70 »b£21 160 160 310 1,310 5,320 6,950 853 134 35 15 163 £55 b£28 175 170 340 1,190 6,450 6,4EO 741 118 31 170 255 £10 170 180 360 940 7,160 6,010 650 115 27 170 245 20£ 175 *198 350 800 7,610 5,960 596 110 22 1 fi 165 228 £00 175 190 335 720 7,960 5,350 548 110 21 170 £21 205 170 185 325 699 6,380 4,780 518 100 21 20 178 £S£ 210 170 1S5 310 636 6,460 4,570 494 91 21 180 £45 . 220 170 188 31 £ 671 6,320 4,800 470 100 20 19E *245 ££0 172 190 310 629 6,850 4,890 488 112 17 207 £40 £20 168 195 310 615 7,590 4,750 482 138 16 £00 240 £10 165 199 320 587 8,330 4,250 455 144 15 25 E40 250 £00 162 £05 3S5 538 8,780 3,980 435 ' 110 15 *>c 197 232 . £00 160 218 340 556 8,080 4,160 385 87 15 194 £00 £10 160 225 318 622 7,000 4,130 375 81 15 19E 168 £00 155 232 368 71-3 6,580 3,850 370 83 16 204 143 190 150 235 340 672 6,880 3,020 315 83 16 X(\ E21 130 170 155 352 1,080 7,440 2,820 285 81 17 " " ~ 31 £60 - 150 165 " 318 7,880 258 79 Seoond- Runoff in Month foot-days Maximum Minimum . Mean acre-feat 5,147 260 128 156 10,210 7,162 318 239 14,210 December ...... 6,172 232 150 199 12,240 Calendar year 1943 ...... 455,482 8,600 111 1,248 903,400 5,205 190 150 168 10,320 5,205 235 138 179 10,320 9,051 360 215 292 17,950 22,053 1,310 376 735 43,740 May...... 156,990 8,780 1,020 5,064 311,400 174,800 8,400 2,820 5,827 346,700 July ...... 32,210 2,760 258 1,039 63,690 Augu st ...... 4,049 242 79 131 8,030 September ...... 983 68 15 32.8 1,950 ' 15 Water year 1943-44 ...... 429,027 8,780 1,172 851,000 # Winter discharge measurement made on this day* b stage-discharge relation affected by Ice. Note.- No gage-height record Dec. 16 to Mar. 26 (stage-discharge relation affected by ic period); discharge computed on basis of 2 discharge measurements and weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 172 GREEN RIVER BASIN

Elk River at Clark, Colo.

Location.- Water-stage recorder, lat. 40°43', long. 106°55', In sec. 28. T. 9 N., R. 85 w., at Clark, 1 mile upstream from Cottonwood Gulch. Datum of gage Is 7,267.75 feet above mean sea level (State Highway bench mark). Drainage area.- 206 square miles. Records available.- May 1910 to November 1913, December 1913 to September 1922 (monthly aiscnarge only), published as Elk River near Clark, and October 1933 to September 1944 In reports of Geological Survey. May 1910 to September 1922, April 1930 to September 1944 In reports of State engineer. Average discharge.- 26 years, 361 second-feet. Extremes.- Maximum discharge during year, 3,760 second-feet May 30 (gage height, 5.17 reet;, from rating curve extended above 2,200 second-feet; minimum dally, 37 second- feet Nov. 26. 1910-22, 1930-44: Maximum dally discharge, 4,470 second-feet June 6, 9, 1912; minimum discharge obeerved, 22 second-feet Apr. 7, 1935 (gage height, 0.62 foot). Remarks.- Records good except those for periods of Ice effect or no gage-height record, wnicn are fair. Practically no diversion or regulation.

Discharge, in second-feet, water year October 1943 tc September 1944 D«S Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 54 a74 42 54 48 66 66 181 1,880 1,060 157 54 2 5S 66 53 54 50 58 70 212 1,S90 980 150 53 3 52 68 54 58 54 58 82 177 1,680 918 150 53 4 52 69 54 56 54 60 90 157 1,350 872 139 51 5 4S 68 56 55 52 58 95 187 1,280 , S5S 132 50 6 47 66 60 62 50 56 90 326 1,160 775 123 51 7 46 65 62 59 50 52 95 490 1,430 666 121 50 fi 46 61 60 56 52 54 101 510 1,590 593 46 9 47 58 58 54 54 54 107 684 1.730 574 115 44 10 46 61 58 53 56 48 121 849 1,900 542 112 43 11 46 61 55 54 56 50 151 eoi 1,870 - 500 102 43 46 56 54 56 52 54 174 933 1,740 440 98 43 15 46 54 55 56 51 54 215 1,300 1,470 402 94 43 46 56 56 56 52 55 192 1,440 1,510 372 90 43 15 45 61 54 55 53 54 163 1,470 1,530 352 90 44 IB 45 58 52 56 51 »55 134 1,600 1,560 324 88 44 17 46 a 60 52 58 50 55 134 1,500 1,330 306 82 45 47 a 65 54 58 50 56 117 8S3 1,160 288 82 42 19 50 68 56 56 52 57 125 916 1,320 304 92 42 20 56 64 58 54 54 57 113 995 1,490 364 83 47 61 62 60 $4 52 56 113 1,260 1,530 304 77 51 22 59 61 59 54 50 57 111 1,510 1,470 276 71 47 23 58 59 57 52 50 60 105 1,660 1,330 272 69 44 24 57 64 56 50 52 56 109 1,720 1,410 250 69 43 25 58 62 56 52 54 63 128 1 1,540 1,520 250 75 42 61 37 55 50 56 58 136 1,380 1,450 221 71 42 27 a65 45 53 48 56 64 163 ^,390 1,240 200 66 38 28 a68 50 53 48 54 60 167 1,520 1,050 188 65 38 29 a74 48 54 50 54 62 159 1,760 1,100 180 62 38 «n a90 52 55 52 _ 64 161 1,92O 1,120 175 62 40 31 a83 " 54 52 ~ 68 - 2,000 - 168 58

Seoond- Runoff in Month foot-days Maximum Minima Mean ao re-feat 1,697 90 45 1,801 74 December ...... 1,715 62 42 55.3 3,400 Calendar year 1943 ...... 117,039 2,660 26 321 232,200 ' January 1,662 62 1,519 56 48 52.4 March...... 1,769 68 48 57.1 3,510 3.S16 215 66 127 7,570 May...... 33,270 2,000 157 1,073 44,090 1,900 1,050 1,470 67,450 13,976 1,060 168 451 27,720 2,960 157 58 95.5 5,870 September ...... 1,354 54 38 45.1 2,690 Water year 1943-44 ...... 109,649 2,000 3V 300 217,500 « Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of record for Yampa River at Steamboat Springs. Kote.- Stage-discharge relation affected by ice Nov. 27 to Bar. 12, Bar. 26 to Apr. 1 (no gage- height record Dec. 28 to Jan. 13). Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 173 Elkhead Creek near Clark, Colo.

Location.- Water-stage recorder, lat. 40°44'00", long. 107°10'00", In SEi sec. 17, T. 9 N., R. 87 w., a quarter of a mile downstream from South Fork and 13 miles west of Clark. Drainage area.- 45.4 square miles. Records available.- July 1943 to September 1944 (discontinued). Extremes.- Maximum discharge recorded during year, 89 second-feet June 15 (gage height, 4.61 reet), but greater during period of no gage-height record; minimum dally, 0.8 second-foot Sept. 2, 8-12, 14, 17. 1943-44: Maximum discharge, that of 1944; minimum dally, 0.7 second-foot Sept. 15-18, 1943. Remarks.- Records good except those for Oct. 1 to June 15, which are poor. No diversion or regulat1on.

Discharge, in second-feet, water year October 1943 to September 1944 Da? Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.4 6.7 3.9 3.0 3.7 4.3 9.4 64 280 2S 4.5 0.9 2 1.7 5.4 3.9 3.1 3.3 4.4 14 74 270 25 4.5 .3 3 1.9 6.0 3.8 3.2 3.9 3.5 IS 75 290 25 4.2 1.2 4 1.7 6.7 3.7 3.2 3.9 4.5 23 66 300 22 3.9 1.0 5 1.9 7.4 3.6 3.0 4.0 4.5 30 73 260 22 3.6 .9 6 1.9 7.0 3.5 3.2 3.9 4,6 35 100 240 19 3.6 .9 7 2.1 6.3 3.4 3.1 3.9 4.6 30 130 240 18 3.9 .9 1.9 5.6 3.5 3.2 3.9 4.6 30 170 220 16 3.3 .8 9 1.9 5.2 3.5 3.1 4.0 4.7 32 210 190 16 3.0 .8 10 2.1 5.6 3.5 3.8 3.9 4.S 29 260 180 14 3.3 .8 11 2.3 6.4 3.4 3.3 3.3 4.9 . 27 280 160 14 2.5 .8 12 2.6 4.8 3.3 3.3 3.6 5.0 30 310 140 12 * 2.3 .8 13 2.5 4.0 3.3 3.5 3.6 5.0 27 350 120 11 1.9 .9 14 2.5 3.4 3.4 3.6 3.7 4.9 22 400 100 10 1.9 .6 15 2.3 3.1 3.5 3.6 3.9 4.9 18 400 88 1.9 .9 16 2.3 3.1 3.4 3.6 4.0 5.0 15 400 84 9.5 2.1 .9 17 2.1 3.3 3.4 3.8 4.0 5.2 13 340 76 9.2 1.9 .6 2.1 3.5 3.5 3.7 4.0 5.4 11 350 68 8.S 2.1 .9 19 2.S 3.7 3.6 3.7 4.0 5.2 12 400 64 8.4 2.5 1.2 20 5.1 3.5 3.6 3.7 4.0 5.4 11 450 58 9.5 1.9 1.4 21 4.2 3.3 3.6 3.7 4.0 5.5 13 500 55 9.2 1.7 1.0 22 3.9 3,6 3,5 3.S 4.0 5.S 16 520 50 S.S 1,6 1.0. 23 3.9 3.9 3.4 3.3 4.0 6.1 20 460 46 8.1 1.4 .9 24 3.3 4.0 3.3 3.8 4.0 6.2 25 400 43 3.1 1.7 1.0 25 4.8 4.0 3.3 3.3 4.1 6.3 32 360 46 8.3 2.6 1.1 26 4.2 3.5 3.4 3.7 4.1 6.4 42 340 40 7.4 1.7 1.1 27 4.2 3.8 m 3.0 3.7 4.8 6.4 46 360 3S 6.0 1.6 1.1 28 4.8 3.4 w 2.7 3.6 4.2 6.6 52 360 34 5.4 1.2 1.1 3.4 3.6 2.3 3.5 4.2 6.7 53 360 31 5,4 1.11.0" 1.4 29 7.S 3.8 3.2 3.5 _ 7.6 54 350 2S 7.4 3.1? 30 - 31 7.8 " 3.0 3.5 - 9.4 320 ~ 5.4 1.0 ~

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 101. S 8.4 1.4 3.2S 202 November...... 137.0 7.4 3.1 4,57 272 December ...... 105.9 3.9 2.7 3.42 210 Calendu; year ...... - - - - - January...... 107,9 3.3 3.0 3.4S 214 February...... 114.3 4.2 3.6 3.94 227 Haroh...... 169.4 9.4 4.3 5.46 336 April...... 788.4 54 9.4 26.3 1,560 May...... 9.227 520 64 298 1S.300 Juno 3,839 300 28 123 7,610' July...... 3S7.4 28 5.4 12.5 768 August ...... 75.4 4.5 1.0 2.43 150 September...... 38.0 3.9 .8 1.O7 63 Water year 1943-44 ...... 15,085.5 520 .8 41.2 29,910 Hote.- Stage-discharge relation affected by lee Hov. 7 to Jnn. 10. Ho gage-height record Jan. 11 ±o June 14 (stage-discharge relation affected by Ice during moat of period); discharge computed on basis of 3 discharge measurements (Jan. IS, Feb. 12, Apr. 19) made 6 miles downstream, weather records, and record for station near Hayden. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 174 GREEK RIVER BASIN

Elkhead Creek near Hayden, Colo.

Location.- Water-stage recorder, lat. 40°38'45", long. 107°16'30", In SWi sec. 16, T. 8 N., R. 88 W., three-quarters of a mile upstream from Calf Creek and 11 miles north of Hayden. Datum of gage Is 6,592.72 feet above mean sea level, unadjusted. Drainage area.- 97.4 square miles. Records available.- October 1942 to September 1944 (discontinued). Extremes.- Maximum discharge during year, 1,420 second-feet May 22 (gage height, 5.95 reet), from rating curve extended above 750 second-feet; no flow Aug. 16-18, Aug..21 to Sept. 18, 2A. 1942-44: Maximum discharge, that of May 22, 1944; no flow at times. Remarks.- Records fair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 458' 1 2.8 12 5.8 4.4 5.0 5.8 16 115 35 4.5 0 2 2.5 9.2 6.0 4.6 5.2 6.0 20 138 426 3.4 5.3 0 3 2.3 12 5.6 4.6 5.4 6.0 30 134 4~78470 28 3.0 0 4 2.3 12 5.4 4.B 5.6 6.0 48 115 24 2.8 0 5 2.3 12 5.2 4.4 5.6 6.0 55 132 402 21 1.4 0 6 2.3 11 5.0 4.6 5.8 6.S 70 200 370 19 1.1 0 7 2.3 9.4 5.2 4.2 5.6 6.2 66 312 370 15 .8 0 8 2.6 9.2 5.2 4.0 5.8 6.2 62 358 350 12 .8 0 9 2.6 10 5.2 4.4 5.8 6.2 66 446 315 9.2 L.O 0 10 3.0 11 5.2 4.2 5.6 6.4 60 530 290 6.8 .8 0 11 3.6 14 5.0 4.4 5.4 6.6 54 538 24S 5.4 .8 0 12 5.4 81 S 4.8 4.6 «5.4 6.8 48 635 236 3.9 .8 0 13 6.4 5.4 4.6 4.8 5.4 6.8 54 752 205 2.8 .8 0 14 3.6 *4.5 4.8 *5.0 5.6 6/6 4S 797 182 2.5 .5 0 15 2.B 4.2 5.0 5.2 5.6 »6.3 38 802 160 2.1 .1 0 16 *2.6 4.0 4.8 5.2 5.6 6.8 24 806 138 1.9 0 0 17 2.6 4.5 5.0 5.2 5.6 7.4 £2 716 122 2.3 <) 0 18 2.5 5.0 5.0 5.0 5.6 7.0 18 617 102 3.0 () 0 19 2.8 6.0 5.2 5.0 5.6 6.8 734 87 4.2 .7 .2 20 5.4 5.7 5.4 5.0 5.6 7.4 18 830 71 6.0 .6 .4 21 8.0 ' 5.1 5.4 5.2 5.6 8.0 19 895 64 8.8 0 .1 22 6.8 6.0 5.4 5.4 5.8 8.8 1,010 58 8.8 ) .4 23 5.7 6.0 5.2 5.4 6.0 9.2 26 959 55 9.2 ) .4 24 4.5 6.4 5.0 5.4 5.8 9.0 59 79,7 54 8,4 ( 0 25 5.1 6.2 5.0 5.2 5.8 8.8 62 653 54 6.8 0 .1 26 5.7 5.4 5.0 5.2 5.6 9.2 68 562 51 6.4 0 .4 27 6.0 4.6 4.2 5.0 5.6 9.6 75 526 63 ji.4 () .6 28 10 4.8 3.6 5.0 5.6 9.4 90 534 60 "o.l c) .6 .29 14 5.2 4.0 4.8 5.6 11 90 534 53 4^5 c) .7 Iso 9.6 5.4 4.8 4.8 13 99 518 44 5.7 c .6 31 11 - 4.4 4.8 - 16 514 5.4 0 - Second- Runoff in Month foot-daya Maximum Minimum Mean acre- feet October...... 149.1 14 2.2 4. SI 296 November ...... 225.0 14 4.C 7.50 446 155.4 6.0 3.6 5.01 308 Calendar year 1943 ...... 19,117.8 543 0 52.4 37 920 ^. January...... 149.8 5.4 4.G 4.83 ^^ 297 February...... 162.2 6.0 5.0 5.59 322 March...... 241.5 16 5.S 7.79 479 April...... 1,445 99 16 48.2 2, 870 May...... 17,209 1,010 115 555 34,130 June ...... 6,036 478 44 201 July...... 312.6 35 1.9 10.1 620 August ...... 23.8 4.5 0 .77. 47 September...... 4.5 .7 0 .15 8.9 Water year 1943-44 ...... 26,113.9 1,010 0 71.3 51,790 * Winter discharge meaaurement made on thla day. Hote.- Stage-diacharge relation affected by ice Nov. 7-11, 15-18, Nov. 25 to Jan. 9, Feb. 1-12, Feb. 21 to Apr. 10. Ho gage-height record Jan. 10-31, Feb. 13-20 (stage-di a charge relation probably affected by lee entire period); diacharge computed on basia of 1 discharge measurement and weather reeorda. Time baaia: Mountain war time. To convert war time to atandard time, subtract 1 hour. GREEN RIVER BASIN 175

Fortification Creek at Cralg, Colo.

Location.- Water-stage recorder, lat. 40°30'50", long. 107032'30", In SEi sec. 31, T. 7 N., K. 90 W., at Craig, 1 mile upstream from mouth. Datum of gage is 6,178.24 feet above mean sea level, datum of 1929. Prior to October 1943, chain gage at same site but different datum. Drainage area.- 258 square miles (revised). Records available.- June 1905 to July 1906, October 1909 to September 1918 (monthly aiscnarge only 1913-18), September 1943 to September 1944. Average discharge.- 10 years (1909-18, 1943-44), 59.3 second-feet. Extremes.- Maximum discharge during period, 744 second-feet May 22 (gage height, 9.66 reetj; no flow Sept. 1, 1943, to Feb. 1, 1944, Feb. 3, 11-20, July 26 to Sept. 30, 1944. 1905-6, 1909-18, 1943-44: Maximum daily dischaTge, 750 second-feet Mar. 27, 1914; no flow at times nearly every year. Remarks.- Records good except those for periods of ice effect or no gage-height record, wnicn are poor. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May 'June July Aug. Sept.

1 0 7.5 bie S7 289 9.2 Z .4 7.5 1)17 107 243 7.6 3 0 7.4 1)2 S 84 230 6.6 4 1.0 7.3 1)27 55 216 5.4 5 1.8 7.0 b35 50 313 4.2 6 2.5 6.9 M6 84 289 3.3 7 2.0 6.8 1)44 156 216 2.5 8 2.1 7.0 bSO 166 204 2.0 9 *2.2 7.4 1)56 162 1SS 1.4 10 1.0 8.0 50 190 194 .S 11 0 7.6 44 206 196 .3 12 0 7.S 46 241 165 .2 13 0 S.2 57 269 130 .2 14 0 8.5 55 294 120 .5 1 15 0 8.4 33 3OO 99 .7 16 0 8.6 23 309 80 .4 17 0 8.S 20 330 67 .5 18 0 *b8.8 *17 366 . 47 .3 19 0 bB.S 15 549 39 .6 20 0 1)9.4 17 427 37 .6 21 .3 1)9.4 IS 515 33 .S 22 1.8 9.S 19 568 32 .4 23 2.S 10 17 505 28 .2 24 4.0 10 15 452 .1 25 6.0 9.6 15 330 23 .1 26 4.5 10 19 247 20 0 27 3.0 10 26 243 IS 0 28 3.3 9.4 36 241 16 0 6.8 11 59 28S 13 0 30 _ 13 SB 323 11 0 31 - bl7 364 0 Second- Runoff in Month fcot-days Maximum Minimum Mean acre-feet

0 0 0 0 0 October 1943 ...... December...... 0 0 0 0 0 Calendar year ...... _ _ _ _

May June , , - 119 9 2

September...... 0 0 0 0 0 Water year 1943-44 .... .1...... 13,467.3 568 0 36. S 26,710 * Winter discharge measurement made on this day. b Stage-discharge relation affected by Ice. Hpte.- Ho gage-height record Feb. 2-10, Feb. 21 to Bar. 17, Bar. 22-30. (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of 1 discharge measure­ ment and weather records. Time baalss Mountain war time. To convert war time to standard time, subtract 1 hour. 176 GREEN RIVER BASIN East Fork of Williams Fork near Willow Creek, Colo. Location.- Water-stage recortor, lat. 40°13', long. 107°16', In NWi sec. 21, T. 3 11., R. 88 W., 0.6 mile downstream from Poose Creek and 7 miles southeast of Willow Creek. Drainage area.- 96 square miles. Records available'.- September 1943 to September 1944. Extremes.- Maximum discharge during period, 895 second-feet tfay 23 (gage height, 2.82 feet), Irom rating curve extended above 400 second-feet; minimum dally, 18 second- feet Feb. 11. Remarks.- Records good except those for periods of Ice effect or no gage-height record, which are fair. Rating tables, water year 1943-44, except period of Ice effect (gage height, In feet, and discharge, In second-feet) (Shifting-control method used May 23, 24) Oct. 1 to May 23 Hay 24 to Sept 30 O.S IS 1.6 164 0.3 19 0.9 98 .9 28 1.7 224 .4 26 1.1 146 1.0 44 2.1 386 .6 35 1.4 246 1.2 86 2.6 566 .6 46 1.9 445 1.5 108 .7 60 2.2 580 Discharge, In second-feet, 1943-44 1943 1*7 . Discharge Day Discharge Day Discharge Day Discharge Sept. 1 59 Sept. 9 34 Sept. 17 33 Sept. 26 P* 2 38 10 55 18 39 26 38 3 38 11 51 19 42 27 56 4 56 12 51 20 38 28 38 5 34 15 51 21 38 29 56 6 54 14 51 22 36 50 54 7 55 16 51 23 54 51 8 55 16 50 24 53 a Bo gage-height record; discharge computed on basis of records for stations on nearly streams. , , ,. Day Oct. HOT. Dec. Jan. 11 30 Feb. Mar. Apr. *«y June July Aug. Sept. 1 51 21 23 22 20 23 46 454 214 46 26 2 30 23 23 22 28 20 23 50 450 206 45 24 3 50 SI 23 25 22 21 24 38 385 192 44 24 4 28 30 24 25 22 21 26 33 289 175 43 24 5 28 26 24 22 21 21 26 62 267 163 41 23 6 28 28 24 B 21 21 26 108 29S 142 40 23 7 27 26 24 is 22 21 26 149 381 128 39 23 8 27 23 26 23 22 20 26 155 389 120 38 23 9 27 26 24 22 22 21 26 212 433 116 37 24 10 27 27 24 23 20 22 26 236 458 111 36 23 11 31 27 23 23 IS 22 26 266 441 105 34 22 12 «38 26 23 23 20 22 26 272 413 92 33 22 13 31 24 25 22 20 22 27 366 393 84 32 22 14 56 24 23 22 20 24 26 454 389 78 31 23 15 51 «23 22 24 19 «22 26 511 405 74 31 2» 16 35 24 22 26 20 21 26 506 369 73 29 23 17 33 27 22 26 20 25 26 561 346 71 27 23 18 30 27 25 *84 20 22 26 244 521 67 27 23 19 33 26 25 24 20 22 26 228 333 69 27 23 20 26 26 23 25 20 23 26 256 369 73 28 24 21 31 25 25 24 21 22 «E4 268 365 65 27 24 22 33 25 23 24 21 21 25 524 357 64 27 24 23 28 26 22 24 21 22 25 448 sol 62 26 24 24 26 26 22 24 21 22 24 648 509 64 27 24 25 50 24 22 25 20 21 24. 454 517 60 35 24 20" 26 31 21 23 22 22 26 406 337 67 29 24 27 51 22 25 25 20 22 41 415 265 56 27 24 28 54 22 23 24 20 21 50 417 238 64 27 24 29 41 21 23 25 20 25 36 468 231 62 26 24 30 38 20 33 23 23 39 499 228 61 26 24 31 33 - 24 22 - 23 - 472 - 60 27 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by Ice HOT. 3-5, 7-17, HOT. 26 to Dec. 26. Ho gage-height record Dec. 26 to Apr. 20 (stage-discharge relation affected by Ice during most of period); discharge computed on basis of 3 discharge measurements and weather records. Monthly discharge, in second-feet, 1943-44 Second- Runoff In Month foot -days Maximum Minimum MeaVl a ere -feet 30

Norember...... 714 717 23.1 1,420 Fobru&ry * 22 . IS 20.6 1,180 21.7 27.0 9,208 548 35 297 18,260 22S 350 20.,820 96.4 6,930 1,011 46 26 32.6 2,010 September...... 704 25 22 S3. 5 1,400 Water year 1943-44 ...... _...... 29,634 548 IS 81.0 58,780 Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. (SEEN RIVER BASIN 177

Little Snake River near Slater, Colo.

Location.- Water-stage recorder, lat. 41°00', long. 107°10 f , In SWi sec. 16, T. 12 N., R. 87 W., at Focus Ranch, a quarter of a mile downstream from willow Creek and 11 miles east of Slater. Datum of gage is 6,829.57 feet above mean sea level, unadjusted. Drainage area.- 285 square miles. Records available.- October 1942 to September 1944. Extremes.- Maximum discharge during year, 2,070 second-feet May 23 (gage height, 7.31 feet), from rating curve extended above 1,400 second-feet; minimum daily, 8.6 second- feet Sept. 10. 1942-44: Maximum discharge, 3,140 second-feet June 1, 1943 (gage height, 8.22 feet), from rating curve extended above 1,400 second-feet: minimum daily, that of Sept. 10, 1944. Remarks.- Records excellent except those for Oct. 1 to May 14, which are fair, Diver- sione above station for irrigation.

Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 19 37 25 16 18 25 52 119 1,670 343 29 12 2 ie 24 25 17 19 25 70 152 1,590 314 28 11 3 17 34 26 17 20 26 69 112 1,740 294 27 11 4 17 35 26 17 21 26 102 35 1,550 285 25 11 S 17 36 25 16 22 26 124 117 1,570 250 25 10 6 17 32 24 18 oo 27 110 250 1,380 222 23 10 7 17 23 23 17 21 27 110 375 1,480 191 23 10 8 16 26 23 16 22 28 117 375 1,570 172 22 10 9 16 29 23 16 25 28 117 460 1,530 159 22 9.0 10 16 32 22 16 24 28 117 607 1,620 144 25 8.6 11 18 32 21 16 22 29 149 677 1,610 136 21 9.0 12 26 31 20 17 20 30 191 755 1,510 119 19 9.5 13 30 29 19 17 21 31 220 958 1,300 108 18 9.5 14 32 27 20 17 «22 31 154 1,100 1,200 91 17 9.5 IS 30 26 20 *18 22 30 114 1,180 1,100 S3 17 9.0 18 28 26 19 IS 22 30 97 1,260 1,090 78 17 10 17 26 *27 19 18 31 83 1,230 965 68 16 10 18 25 31 20 18 22 32 72 765 830 62 15 10 19 25 27 20 18 22 32 74 785 838 57 19 16 20 30 27 20 18 22 32 «68 912 845 74 21 18 21 32 25 19 19 23 31 63 1,170 S15 60 IS 15 22 37 27 19 19 24 32 63 1,420 740 63 16 12 23 35 23 19 19 26 33 58 1,590 663 56 15 12 24 29 23 18 19 25 35 63 1,630 642 53 15 11 25 32 26 18 19 25 37 82 1,400 614 56 27 11 26 34 24 19 19 24 38 87 1,260 ' 586 50 20 11 27 35 20 IS 19 23 38 104 1,230 500 43 16 11 28 38 22 16 18 23 27 139 1,410 440 40 14 12 29 50 24 17 17 23 45 110 1,530 411 36 13 11 30 55 26 18 17 52 110 1,670 375 35 13 12 31 42 17 IS - 54 1,750 32 12 Seoond- Runoff In Month foot-days Maximum Minimum Ue'an acre-feet

November December...... 638 26 16 20.6 1,270 Calendar year 1943 ...... 77,680 2,340 12 213 154,100 544 19 16 17.5 1,080 645 26 IS 22.2 1,280 996 32.1 1,980 6,140. l«ty 1,750 85 915 56,280 1,740 375 1,092 65,010 3,773 343 32 122 7,480 608 29 12 19.6 1,210 September...... 331.1 18 S.6 11.0 657' .Water year 1943-44 ...... 73,477.1 1,750 8.6 201 145,800 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by Ice Nov. 7-9, Nor. 27 to Dec. 14, Jan. 16 to Mar. 5, Mar. 16-31. No gage-height record Dec. 15 to Jan. 15, liar. 6-16, (stage-discharge relation probably affected by ice during entire period); discharge computed on basis of 3 discharge measurements and weather* records. Time "basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 178 GREEN RIVER BASIN

Little Snake River near Dlxon, Wyo.

Location.- Water-stage recorder, lat. 41°02<, long. 107°32', In sec. 6, T. 12 II., R. 90 W., 600 feet upstream from Willow Creek and 1 mile west of Dlxon. Datum of gage Is 6,332.81 feet above mean sea level, unadjusted. Drainage area.- square miles. Records available.- May 1910 to September 1923 (no winter records), March 19S8 to September 19447 Extremes.- Maximum discharge during year, 4,960 second-feet 23 (gage heignt, 6.57 feet); minimum dally, 2.9 second-feet Sept. 13, 14. 1910-23, 1938-44: Maximum discharge observed, 8,960 second-feet May 23, 1920 (gage height, 8.3 feet, datum then In use), from rating curve extended above 6,000 second-feet; minimum daily, 0.6 second-foot Aug. 24-27, 1939. Remarks .- Records excellent except those for periods of Ice effect or no gage-height record, which are fair. Diversions above station for Irrigation. Rating table, water year 1945-44, except period of ice effect (gage height, In feet, and discharge. In second-feet) (Shifting-control method used Oct. 1-11, Sept. 21-30) 1.1 1.5 1.7 43 2.7 380 1.2 3.5 1.9 76 3.1 650 1.3 6.5 2.0 96 3.6 3L,070 1.4 11 2.1 120 4.2 3 ,700 1.5 18 2.3 165 5.2 £ ,980 1.6 28 2.5 270 6.4 4,700

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Bay June July Aug. Sept. 1 7.4 94 68 50 60 80 225 490 3,580 674 7.4 4.7 2 7.4 76 71 64 62 82 193 538 3,460 573 7.0 4.4 3 7.4 64 69 64 64 82 238 464 3,860 546 7.0 4.4 4 7.4 78 66 56 68 82 305 344 3,430 524 7.0 4.1 5 7.0 86 62 50 70 82 412 400 3,830 464 7.0 4.1 6 6.5 86 58 60 73 82 426 629 3,080 362 7.0 4.4 7 6.5 68 60 56 70 84 280 1,120 3,150 238 7.0 4.1 8 6.5 62 62 50 73 84 356 1,24 0 3,400 185 7-. 4 3.8 9 6.5 62 62 54 78 86 400 1,290 3,190 147 7.4 3.5 10 7.0 76 60 52 78 86 368 1,720 3,290 132 7.0 3.3 11 7.4 90 60 62 70 88 484 1,630 3,260 ISO 7.8 fc.l 12 9.6 88 56 53 66 90 698 1,810 3,150 92 ' 7.8 3.1 13 11 82 62 55 68 92 926 2,2C 0 2,670 73 7.0 2.9 14 12 86 56 56 *71 94 594 2,670 2,610 64 6.2 2.9 15 17 78 58 *57 72 90 445 2,800 2,240 51 5.6 3.1 16 18 73 56 60 72 «93 320 2,940 2,210 43 5.6 3.3 17 25 71 56 60 72 96 305 3,06 0 2,030 36 5.6 3.3 18 24 *73 58 58 72 100 217 2,24 0 1,660 26 6.0 3.S 19 25 84 60 58 72 105 256 2,21 0 1,600 19 4.7 4.7 20 32 76 62 60 72 105 234 2,490 1,610 13 N 4.7 5.6 21 48 74 64 60 72 100 «252 3,220 1,550 12 4.7 5.9 22 59 73 60 62 74 105 243 3,79to 1,460 12 4.7 5.9 9.3 68 78 62 62 80 110 217 4,42 0 1,270 11 4.7 5.3 24 64 74 60 62 82 115 217 4,30 0 1,190 11 4.7 4.7 25 57 73 56 62 80 120 285 3,540 1,180 11 4.4 4,7 26 62 61 62 62 78 130 374 3,050 1,150 9.6 4.7 4.7 27 73 50 56 60 76 136 386 2, 8S 0 1,080 9.2 5.9 4.7 28 74 55 46 56 76 118 510 2,98 0 917 8.8 5.3 5.0 29 84 64 50 54 76 144 497 3,3S 0 810 8.3 4.7 5.6 30 108 69 56 54 174 478 3, V) 0 746 7.8 4.4 7.4 31 110 52 56 - 217 - 3,780 - 7.8 4.4 ~ Mean Runoff in Month ££& «* Minimum acre feet

October...... 1,057.6 110 6.5 34.1 2,100 November...... 2,224 94 50 74.1 4,410 .. December...... 1,836 71 46 59.2 3,640 ^ Calendar year 1943 ...... 167,314.1 5,630 5.1 458 331 ,900 January ...... 1,755 62 50 56.6 3,480 February...... 2,097 82 60 72.3 4,160 March...... 3,251 217 80 105 6,460 April ...... 11,141 926 193 371 22,100 Way 71,145 4,420 344 2,295- 141,100 June ...... 66,563 3,860 746 2,285 136,000 July...... 4,488.5 674 145 8,900 August ...... 183.8 7.8 4U 5.93 365 September ...... 130.5 7.4 2.9 4. 35 259 Water year 1943-44 ...... 167,872.4 4,420 2.9 459 333,000 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by Ice NOT, 8, 9, 27-29, Dec, 4-26, Jan. 15 to Mar. 27. No gage-height record Dec. 27 to Jan^ 14 (stage-discharge relation affected by Ice during entire period); discharge computed on basis of weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 179

Little Snake River near Lily, Colo.

Location.- Water-stage recorder, lat. 40°32', long. 108°25', in sec. 20, T. 7 N., R. 98 W., 6 miles north of Lily and 10 miles upstream from mouth. Drainage area.- 3,730 square miles. Records available.- June to August 1904 and October 1921 to September 1944. Records of monthly discharge prior to October 1938 have been republished, with some additions, in Water-Supply Paper 918. Average discharge.- 23 years (1921-44), 608 second-feet. Extremes.- Maximum discharge during year, 6,200 second-feet May 22 (gage height, 5.93 feet), from rating curve extended above 4,300 second-feet; no flow Sept. 9-18, 21-30. 1904, 1922-44: Maximum discharge, 14,200 second-feet May 27, 1926 (gage height, 10.5 feet), from rating curve extended above 3,600 second-feet; no flow at times in 1924, 1930, 1931, 1934^-36, 1939*1940, 1942, 1944. Remarks.- Records fair except those for Aug. 2-24, viiich are poor, Diversions above station for irrigation. >

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 13 59.0 100 59 74 79 360 1,140 4,290 S42 32 ' 0.2 2 7.4 SO 97 58 75 S6 390 874 4,220 762 27 .2 3 2.6 66 b90 65 70 87 350 768 4,080 702 21 .2 4 1.7 S2 bS3 62 72 84 420 732 4,460 644 18 .1 5 1.3 71 b79 58 78 SO 540 725 4,830 644 16 .1 6 1.2 56 b74 67 76 76 640 629 4,810 589 14 .1 7 1.2 47 b71 65 78 75 715 516 3,970 523 12 .1 8 1.2 46 b75 58 SO 73 490 748 3,600 442 9.0 .1 9 1.0 52 b78 62 84 '.76 620 1,240 3,990 345 7.4 0 10 1.0 62 b7S 59 86 96 690 1,270 3,690 283 6.4 0 11 1.5 65 b76 *58 70 102 660 1,480 3,570 239 5.9 0 12 3.2 75 b73 59 66 105 S40 1,610 3,620 195 5.6 0 13 3.S 75 U69 60 67 107 1,200 1,650 3,620 157 6.1 0 14 23 71 b6S 62 68 105 1,500 1,870 3,040 133 4.S 0 15 44 71 b70 64 71 103 1,050 2,170 2,700 119 4.2 0 16 27 71 b70 67 60 108 S50 2,360 2,380 98 3.3 0 17 19 71 b70 70 «61 114 560 2,460 2,270 S4 2-7 0 18 16 73 b71 66 65 115 440 3,280 2,130 79 2.3 0 19 15 75 b72 65 69 115 450 4,620 1,900 70 2.0 .1 20 14 75 b74 67 66 120 «419 2,810 1,700 63 1.7 .1 21 13 75 b74 67 68 135 397 2,880 1,640 65 1.4 0. 22 13 «71 70 6S 71 140 392 3,420 1,640 56 1.3 0 23 13 70 69 71 68 145 365 4,220 1,570 48 1.2 0 24 13 68 68 74 74 150 365 5,130 1,430 56 1.1 0 25 20 60 67 73 79 159 392 5,340 1,290 60 1.0 0 26 38 55 70 68 78 169 350 4,310 1,230 40 .6 0 ?7 44 15 66 6S 75 185 355 3,600 1,210 38 .6 .0 ?8 44 63 63 70 74 170 516 3,230 1,190 36 .6 0 29 44 65 60 70 74 210 935 3,230 1,100 36 .3 0 30 45 77 61 65 - 245 1,410 3,640 952 35 .5 0 31 47 - 61 65 - 315 - 3,880 - 33 .3 ~

Seopnd- Runoff in Month foo todays Maximum Minimum Mean acre feet

December ...... ~...... 2,267 100 60 73.1 4,500 Calendar year 1943 ...... 171,194.9 7,530 '.6 469 339,600 2,010 58 3,990 2,097 86 60 72.3 4,160 3,929 . 75 127 7,790 April ...... 18,661 1,500 350 622 37,010 May...... 75,826 5,340 516 2,446 150,400 82,122 4,830 952 2,737 162,900 7,516 842 33 242 14,910 209.3 32 .3 6.75 415 September...... l.S .2 0 .04 2.6 Water year 1943-44 ...... 197,152.7 5,340 0 539 391,100 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- No gage-height record Dec. 22 to Apr. 19 (stage-discharge relation affected by ice most of period) ; discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams. No gage-height record Aug. 2-24; discharge computed on basis of records for stations on nearby streams. Time basla: Mountain war time. To convert war time to standard time, subtract 1 hour. 180 GREEN RIVER BASIN

Battle Creek near Slater, Colo.

Location.- Water-stage recorder, lat. 41000', long. 107°15', In NW£ sec. 14, T-. 12 H., R. 88 W. (Colorado), at Wyoming-Colorado State line, a quarter of a mile upstream from mouth and 7 miles east of -Slater. Datum of gage Is 6,697.10 feet above mean sea level, adjustment of ..1912. Drainage area.- 85.3 square miles. Records available.- October 1942 to September 1944. Extremes.- Maximum discharge during year, 830 second-feet May 30 (gage height, 3.99 feet), from rating curve extended above 600 second-feet; minimum daily, 4.3 second- feet Sept. 10. 1942-44: Maximum discharge, 967 second-feet June 1, 1943 (gage height, 4.64 feet), from rating curve extended above 600 second-feet; minimum dally, 4.0 second-feet Nov. 22, 1942. Remarks.- Records good June 15 to July 30 and poor for remainder of year. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 4.6 10 7.8 5.6 6.6 7.S 22 31 580 141 14 4.8 2 4.e 9.2 7.5 5.6 6.4 7.S 21 35 560 132 12 5.3 S 4.8 9.2 7.0 5.8 7.0 7.S 26 30 535 142 IS 5.0 4 4.6 11 7.0 6.0 7.8 7.S 51 25 660 141 11 4.7 6 4.6 11 6.8 5.6 7.6 7.8 39 35 644 125 11 4.5 6 4.6 9.5 6.6 6.6 7.6 S.O 46 64 555 110 11 4.5 7 4.6 10 6.6 6.8 7.4 S.O 45 109 611 90 11 4.7 8 4.6 6.8 6.8 5.6 7.6 S.O 55 123 633 77 9.1 5.2 9 4.8 11 6.S 6.8 7.S 8.0 72 135 622 71 8.6 5.0 10 4.8 18 6.6 6.0 7.8 8.2 70 167 716 65 8.1 4.5 11 5.5 10 6.6 6.8 7.6 S.4 75 161 "721 63 7.6 4.6 12 6.5 10 6.2 6.4 7.2 8.6 S6 172 666 58 6.2 4.8 13 6.5 9.5 6.0 6.4 7.2 S.S 96 196 560 52 5.8 4.8 14 5.9 9.2 6.2 6.6 *7.5 8.8 89 230 540 46 5.8 5.0 16 6.3 9.0 6.4 «6.8 7.4 S.6 76 277 485 43 5.8 5.3 16 6.3 9.5 6.4 7.0 7.4 «e.7 44 505 495 40 6.7 5.4 17 6.1 *9.5 6.4 6.8 7.4 8.8 27 513 455 34 6.2 5.6 18 5.4 10 6.6 6.6 7.6 9.2 23 252 382 30 6.2 5.6 19 5.5 e.2 6.8 6.4 7.6 9.2 26 238 378 29 6.7 5.8 20 7.3 7.5 7.0 6.6 7.6 9.2 *20 235 398 32 5.8 6.2 21 7.5 6.5 6.8 6.8 7.6 9.2 24 360 394 26 6.2 6.2 22 10 6.9 6.S 6.8 7.6 9.8 22 515 362 24 5.8 6.2 23 9.2 6.5 6.8 7.0 7.6 10 20 610 318 24 5.8 6.2 24 8.0 6.4 6.6 7.0 7.8 11 22 540 303 22 6.7 5.8 25 8.8 7.5 6.8 7.0 7.6 12 25 430 294 22 7.2 6.6 26 9.0 5.5 6.S 6.8 7.4 13 25 375 288 20 6.7 5.6 27 9.2 5.5 6.8 6.6 7.4 12 25 380 249 17 5.S 5.6 28 10 6.7 5.4 6.4 7.4 11 32 450 195 17 5.8 6.6 29 14 6.7 5.6 6.8 7.6 12 29 580 166 16 5.8 5.6 . 30 13 6.5 6.0 6.8 _ 14 31 620 152 17 5.8 6.2 31 18 - 5.8 6.8 - 15 - 630 15 5.5 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 21S.6 14 4.6 7.05 434- November...... 257.8 12 5.4 8.59 511 December...... 203.1 7.5 5.4 6.55 403 Calendar year 1943 ...... 23,446.7 765 "64.2 46,500 January...... 198. 2 7.0 5.6 6.30 395 February 215.3 7.S 6.4 7,42 427 March...... 296.5 15 7.8 9.56 588 April...... 1,240 96 20 41.3 2,460 May...... 8,625 630 25 278 17,110 June...... 13,917 721 152 464 " 27,600 July...... 1,741 142 15 56.2 3,460 August...... 237.7 14 5.5 7.67 471 September...... 159.5 6.2 4.5 5.32 316 Water year 1943-44 ...... f . 27,309.7 721 4.3 74.6 54,160 * Winter discharge measurement made on this day. Bote.- Stage-discharge relation affected by lo'e Dec. 1 to Jan. 6, Mar. 16-23, Apr. 6-8. Ho gage- helght record Jan. 7 to Mar. 15, Mar. 24 to Apr. 5, Apr. 16-19 (stage-discharge relation probably affected by Ice during most of period); discharge computed on basis of 2 discharge measurements and weather records. Ho gage-height record Sept. 1-30; discharge computed on basis of records for sta­ tions on nearby streams. Time baa Is: Mountain war time. To convert war time to standard time, subtract 1 hour. CKEEN RIVER BASIN 181

Slater Fork near Slater, Colo.

Location.- Water-stage recorder, lat. 40°59', long. 107°23', In SWi sec. 21, T. 12 II., R. 89 W., about 1 mile upstream from mouth and li miles south of Slater. Drainage area.- 161 square miles. Records available.- May 1910 to May 1912, October 1933 to September 1944 In reports of Geological Survey, fby 1910 to May 1912, June 1931 to September 1944 In reports of State engineer. Average discharge.- 13 years (1931-44), 67.1 second-feet. Extremes.- Maximum discharge during year, 760 second-feet May 24 (gage height, 6.82 feet); minimum dally, 1.8 second-feet Aug. 24. 1910-12, 1931-44: Maximum dally discharge, 1,700 second-feet May 19, 1912; no flow Aug. 2-10, 1934, Aug. 18, 25-27, 1936. Remarks.- Records good except those for periods of ice effect or no gage-height racord, and those below 20 second-feet, v*ilch are fair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 8.6 20 13 13 17 20 20 64 453 alOO a74 7.2 2 9.0 12 12 13 17 21 20 77 454 92 6.9 6.9 3 9.4 15 14 13 16 21 26 58 550 S9 6.4 6.2 4 10 19 16 13 16 22 44 42 49S 7S 6.0 6.9 5 10 16 15 13 15 22 58 64 480 74 5.2 5.4 6 10 13 14 14 16 20 59 116 573 a64 4.8 3.2 7 9.7 13 16 13 16 18 48 194 416 a50 4.6 2.9 8 9.7 12 13 13 16 18 50 ISO 414 42 4.8 2.9 9 10 17 13 12 16 24 57 226 402 39 4.5 2.6 10 11 14 12 12 14 21 58 314 447 34 4.2 3.6 11 12 14 12 12 9.9 20 70 301 426 a30 4.3 6-0 12 15 13 12 12 17 19 85 378 578 a26 4.4 4.0 13 16 12 12 13 16 28 99 45S 312 a23 4.8 7.0 14 16 13 14 13 *17 21 61 512 311 21 3.5 7.4 15 16 12 15 *13 17 18 50 53S 291 a!7 3.3 8.2 16 16 12 *13 13 14 *16 34 570 288 . 15 3.3 S.8 17 16 12 13 14 17 18 35 481 249 14 3.3 9.2 16 15 *14 14 14 18 17 29- 304 202 al3 3.7 10 19 15* 13 13 13 19 14 33 339 210 alS 3.9 12 20 19 13 14 13 19 16 32 408 829 a!5 5.8 13 21 22 13 13 13 19 16 32 471 229 a!4 5.0 11 22 22 14 13 12 20 16 30 525 214 a!3 2.2 11 23 2O 14 13 12 20 19 26 564 171 13 2.0 11 24 19 9.9 12 12 21 17 30 564 170 813 1.8 12 25 20 16 13 12 20 14 59 424 171 13 3.5 13 26 20 6.4 14 13 20 21 42 371 195 11 4.3 13 27 20 11 13 13 19 17 45 557 170 alO 4.4 13 28 22 12 13 Is 19 14 66 414 153 a9.S 5.0 13 29 29 13 13 14 2O 23 52 43S a!37 a9.2 4.4 14 30 31 13 14 15 .. 19 57 445 al2O 9.0 5.5 20 31 25 - 13 16 - 21 - 490 - aS.4 5.7 - Second- Runoff in Month foe t-days Maximum Minimum Mean acre-feet 16.2 998 20 13.4 796 December ...... 414 16 12 13.4 821 Calendar year 1943 ...... 22,541.7 1,030 3.2 61.8 44,710 16 12 13.0 801 9.9 17.3 994 19.1 1,170 46.2 2,750, Hay...... 9 113 1,930 September...... 263.5 20 2.8 8.7S 623 Water year 1943-44 ...... 25,376.2 570 l.S 69.3 50,340 * Winter discharge measurement Made on this day. a Ho gage-height record; discharge computed on basis of records for stations on nearby streams. Note.- Stage-discharge relation affected by ice Dec. 9, 11-13. ffo gage-height record Dec. 21 to Jan. 14, Feb. 20 to Mar. 4 (stage-discharge relation affected by ice most of period)! discharge com­ puted on basis of weather records. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 182 GREEN RIVER BASIN Savery Creek at upper station, near Savery, Wyo. .Location.- Water-stage recorder, lat. 41°12', long. 107°22', In sec. 2, T. 14 N., R. 89 W., li miles downstream from Coal Gulch and 13i miles northeast of Savery. Prior to July 8, 1943, recorder at site 700 feet upstream at different datum. Drainage area.- 189 square miles. Kecords available.- October 1940 to September 1942, July 1943 to September 1944, no winter records (discontinued). Extremes.- Maximum discharge during period July 1943 to September 1944, 285 second-feet pay i& (gage height, 4.72 feet), from rating curve extended above 100 second-feet; minimum dally, 2.4 second-feet Sept. 3-6, 10, 1944. 1940-42, 1943-44: Maximum discharge, 495 second-feet my 5, 1941 (gage height,-4.8C feet, site and datum then In use), from rating curve extended above 360 second-feet; minimum dally, that of Sept. 3-6, 10, 1944. Remarks.- Records fair above 10 second-feet and poor below. Diversions above station for irrigation. Discharge, In second-feet, 1943-44 1943 Day July Aug. Sept. Day July Aug. Sept. Day July Aug. Sept. 1 - 6.3 7.2 11 11 S 1 5.0 21 7 2 8 5 5.4 2 - 6.3 6.3 12 10 S 5 5.0 22 8 1 8 1 5.9 3 - S.5 5.4 13 9 4 9 0 5.0 23 8 1 8 1 6.3 4 _ 9.4 5.0 14 9 0 8 1 5,0 24 7 6 8 1 6.3 5 - 8.5 5.0 15 8 B 7 6 5.0 25 6 8 8 5 6.3 6 - 11 5.0 16 9 0 6 8 5.0 26 6 3 8 1 7.2 7 - 10 5.4 17 9 4 6 8 5.0 27 6 3 6 8 7.6 8 14 9.4 5.4 18 9 0 7 2 4.7 28 6 3 6 3 8.5 9 13 8.5 5.4 19 8 1 B 5 4.7 29 6 3 5 9 9.0 10 13 S.5 5.4 20 7 6 10 5.0 30 6 3 5 4 S.5 31 6 3 6 8 -

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 S.I 14 14 _ 158 49 4.0 2.8 2 8.1 14 15 _ 150 44 3,1 3.1 3 8.1 14 17 - 1S5 4S 4.7 2.4 4 S.I 16 IS - 180 44 4.7 2.4 5 S.I 16 17 - 215 38 3.5 2.4 6 8.5 ' 14 14 _ 185 33 3.4 2.4 7 8.5 13 15 _ 180 29 3.5 3.4 8 S.5 14 16 - 195 27 3.3 4.0 9 S.I 16 17 - 180 24 3.7 E.S 10 8.1 15 17 - 155 21 3.5 2.4 11 S.5 19 _ _ 140 19 3.4 3.1 12 9.0 17 _ - ISO 17 3.4 3.1 13 11 IS u _ - 120 15 3.3 4.4 14 9.4 18 _ - 11 D 14 3.2 4.4 9.4 16 - - 105 14 3.1 5.0 15 « 16 9.4 15 _ _ 100 14 3.7 5.0 17 9.4 15 _ - 99 13 3.7 5.4 I Q _ - 96 11 4.7 5.9 LO 9.0 17 19 10 16 _ - 89 10 5.9 7.2 20 13 16 - 173 S3 11 5.9 9.0 21 13 16 _ 209 77 11 5.0 S.5 22 14 16 S54 74 10 5.4 8.1

September ...... 175.9 9.0 4.7 slse 549 " " 8.1 11.1 6S5

" ~ - March ...... ~ ~ April...... ~ 188 July ......

September...... 163.0 11 2.'4 5.<43 323 Water year ...... - - - - . Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 183

Savery Creek near Savery, Wyo.

Location.- Water-stage recorder, lat. 41006'00lt , long. I07°22'50lt , in SWi sec. 14, T. 13 N., R. 89 w., li miles downstream from Loco Creek and 6i miles northeast of Savery. Drainage area.- 330 square miles. Records available.- October 1941 to September 1944. Extremes.- Maximum discharge during year, 1,490 second-feet May 22 (gage height, 6.12 reet), from rating curve extended above 850 second-feet; minimum daily, 2.2 second- feet Sept. 6. 1941-44: Maximum discharge, that of May 22, 1944: minimum daily, 1.4 second-feet Sept. 10, 1943. Remarks.- Records excellent except those for periods of ice effect or no gage-height record, and those below 20 second-feet, which are fair. Many diversions above station for irrigation.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 8.1 24 22 19 22 32 90 199 563 86 9.3 4.0 2 7.S b23 21 19 22 32 88 213 56 S 81 7.5 3.5 3 7.8 21 b23 20 22 33 100 162 748 69 8.4 3.8 4 7.4 23 24 20 23 33 130 132 732 87 8.0 3.5 5 8.5 24 24 18 25 33 160 159 856 76 5.4 2.5 6 7.0 23 25 19 26 33 170 290 656 65 5.4 2.2 7 6.6 b23 24 18 25 34 150 434 644 53 5.8 3.0 8 7.0 b22 24 17 25 34 170 456 756 50 5.4 3.2 9 7.0 24 23 17 26 35 190 448 620 47 6.1 3.2 10 5.5 31 23 17 28 36 190 512 544 58 5.4 4.0 11 S.I 26 22 17 38 37 230 445 504 41 4.7 3.3 12 9.8 25 b21 17 88 37 290 452 462 35 4.4 3.8 13 11 26 b!9 17 28 36 330 524 401 30 3.8 3.8 14 14 26 b!9 17 #28 37 200 584 359 25 3.5 3.8 15 14 24 b20 17 28 36 150 612 330 26 3.5 4.4 16 14 23 b!9 *17 28 36 140 604 315 28 3.2 4.7 17 15 24 b!8 18 88 38 120 540 295 26 3.2 4.7 18 14 23 b!8 IB 28 40 90 428 264 24 5.0 19 15 24 b!8 18 89 41 100 508 233 20 3.5 6.8 20 20 24 b!9 18 30 42 *97 668 221 22 3.2 8.0 21 SI 24 b!9 18 31 42 103 1,020 206 22 3.5 9.3 22 23 24 b!9 19 32 45 96 1,280 204 22 4.4 8.8 23 25 25 b!8 20 32 47 89 1,300 199 22 4.4 8.4 24 SS 26 18 21 33 49 93 1,140 178 23 4.7 8.0 25 21 24 19 21 33 52 133 856 182 21 6.8 8.0 26 23 b23 19 20 32 55 153 696 219 16 7.2 8.4 VI 24 22 20 20 31 57 160 620 168 16 6.8 8.8 28 23 21 19 20 31 57 199 604 141 16 6.4 9.3 29 24 21 18 20 31 55 178 ' 628 121 15 6.1 9.3 30 29 20 20 20 62 176 612 102 16 6.1 9.8 31 29 - 19 21 - 76 636 - 12 5.0 - Second Runoff in Month foot-days Maximum Minimum Mean acre-feet 469.6 29 5.5 15.1 931 713 31 20 23.8 1,410 December ...... 634 25 .18 20.5 1,260 Calendar year 1943 ...... 30,314.8 1,180 1.4 83.1 60,120 21 17 18.6 1,150 613 33 22 28.0 1,610 1,314 76 32 42.4 2,610 4,565 330 88 152 9,050 May...... 1,300 132 573 35,230 102 394 23,440 July 1,177 69 12 38.0 2,330 163.6 9.3 2.5 5.28 324 September...... 169.8 9.8 2.£ 5.66 337 Water year "1943-44 ...... ~...... 40,175.0 1,300 2.E 110 79,680 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Sate.- No gage-height record Dec. 24 to Apr. 19 (stage-discharge relation affected by ice during moTTtPoT period}; discharge computed on basis of 2 discharge measurements, weather records, and record for Little Snake River near Dixon. Time basts: Mountain war time. To convert war time to standard time, subtract 1 hour. 184 OREEN RIVER BASIN

Brush Creek near Vernal, Utah

Location.- Water-stage recorder, lat. 40°35', long. 109°26', In NWiNEi sec. 10, T. 3 S., R7"22~E., 2 miles upstream from Little Brush Creek and 10 miles northeast of Vernal. Drainage area.- 82 square miles. Records available.- March 1939 to September 1944. Extremes.- Maximum discharge during year, 380 second-feet May 14 (gage height, 4.65 feet) rrom rating curve extended above 270 second-feet; minimum daily, 12 second-feet at times November to February, but may have been less during period of no gage-height record In winter. 1939-44: Maximum discharge, that of May 14, 1944; minimum recorded, 7 second-feet Jan. 2, 1940, but may have been less during periods of ice effect. Remarks.- Records good except those for period of no gage-height record, which are fair. Two small diversions above station for irrigation. Water fron Oaks Park Reservoir on headwaters (capacity, 6,250 acre-feet) is diverted to Ashley Creek Basin above station for Irrigation.

Rating tables, water year 1943-44 (gage- height, In feet, and discharge, In second-feet Oct. 1 to Feb. 29 Mar. 1 to Sept. 30 0.8 11 0.7 12 1.0 24 2.0 15 .S IS 1.2 34 3.0 188 1.0 20 .9 19 1.5 54 4.0

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 15 15 13 13 14 18 261 143 32 25 2 14 15 13 14 14 17 2 SI 133 32 25 3 14 14 13 14 15 17 287 US 32 25 4 14 14 13 14 16 16 275 106 31 26 5 13 14 13 14 18 17 265 94 30 26 6 13 14 13 14 18 20 264 86 30 25 7 13 14 14 14 16 26 270 77 30 24 8 13 14 14 13 15 29 273 7E 30 24 9 14 13 13 13 IS 32 273 6S 30 23 10 14 13 13 13 15 51 273 60 30 23 11 14 14 13 14 15 92 274 54 29 23 12 14 14 13 13 15 145 274 51 29 S3 13 14 14 13 13 IS 1S8 273 50 2S 23 14 14 13 13 13 15 249 268 48 28 23 15 14 13 13 13 15 287 263 46 29 23 12 > 12 16 14 14 13 13 14 294 261 46 29 23 17 14 13 13 13 14 282 255 41 28 22 18 14 12 13 13 14 262 24S 37 28 22 19 20 13 13 13 14 . 256 240 36 28 23 20 16 13 13 13 IS 242 233 36 28 22 21 16 13 13 13 15 234 228 36 28 22 22 16 14 13 13 14 240 221 36 2S 22 23 15 13 13 13 14 248 216 34 27 22 24 15 13 13 14 14 255 20S 3S 27 22 25 15 13 13 13 IS 255 196 35 27 22 26 IS, 13 13 13 14 251 192 34 27 22 27 IS 13 13 13 14 249 190 34 27 22 28 15 13 12 14 15 248 179 33 22 29 15 13 12 13 25 246 170 32 26 21 30 16 13 12 _ 13 21 251 152 32 26 22 31 15 ' 13 - 14 - 257 32 26 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 452 20 12 14.6 897 November...... 404 15 IE 13.5 SOI December...... 402 14 1£ 13,0 797 Calendar year 1943 ...... 9,868 132 10 27.0 19,580 January...... 37S 12 73S February...... 348 _ _ 12 690 March...... 413 14 13 13.3 819 April...... 467 25 14 15.6 926 May...... 5,274 294 16 170 10,460 June ...... 7,263 287 152 242 14,410 July...... 1,773 143 32 57.2 3,520 August...... 886 32 26 28.6 1,760 September...... 692 26 £3 23.1 1,370 Water year 1943-44 ...... 18,746 294 - 51.2 37,190 Note.- No gage-height record Dec. 9 to Mar. 6, May 8; discharge computed on basis of 1 discharge easurement, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour GREEN RIVER BASIN 185

Brush Creek near Jensen, Utah

Location.- Staff gage, lat. 40°24', long. 109°21', in SWi sec. 4, T. 5 S., R. 23 E., at moutn, 2f miles north of Jensen. Prior to May 15, at different datum. Records available.- April 1939 to September 1944. Extremes.- Maximum discharge during year, 680 second-feet May 16 (gage~helght, 4.30 feet), rrom rating curve extended above 300 second-feet; minimum observed, 0.2 second-feet July 23-28. 1939-44: Maximum discharge observed, 900 second-feet Aug. 17, 1941 (gage height, 5.50 feet, site and datum then in use), from rating curve extended above 250 second- feet; no flow on many days In some years. Remarks.- Records fair except those for periods of Ice effect or no gage-height record, which are poor. Gage read once daily; twice daily during high water. - Many diversions above station for Irrigation.

Rating tables, water year 1943-44, except periods of ice effect (gage height, In feet, and discharge, in second-feet) ' (Shifting-control method used Apr. 5 to Hay 11)

Oct. 1 to Hay 15 Hay 16 to Sept. 30 1.0 0.8 1.4* 2.5 129 0.6 9.0 2.0 144 1.1 2.5 1.6 3.0 205 .5 .S IS 2.5 239 1.2 5.0 1.8 3.5 291 1.6 1.0 3.0 352 1.3 S.5 2.0 3.3 1.3 3.6 500 .5 5.7 1.6 Discharge, in eecond-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1.5 2.2 3.5 (*) a23 14 222 103 0.5 aO.S 2 1.5 i' 8 5.0 23 12 301 53 .5 .5 3 1.5 1.3 5.7 24 11 450 52 .5 .7 4 1.5 1.8 5.7 on 15 265 41 .5 .5 5 1.5 l.S 18 26 23 231 36 .5 .5 6 1.5 l.S IS 33 31 231 29 .5 .7 7 1.5 l.S 17 («) 23 3S 222 18 .7 .5 8 1.5 l.S 18 a20 62 210 alO .7 .5 9 1.5 l.S 16 18 75 210 a7.0 .7 .4 10 1.6 l.S 16 . 18 21 122 206 a5.0 .7 .4 11 1.1 1.8 16 S2 135 206 a4.0 .5 a. 4 12 2.5 1.8 16 251 210 a3.0 .5 a. 4 13 2.3 1.6 15 18 259 212 a2.0 .5 .4 14 l.S 1.5 15 34 259 210 al.5 .5 .4 15 l.S 1.5 16 27 323 200 1.4 .5 a. 4 > 15 14 16 1.8 1.5 16 9.0 a500 192 .9 .5 .4 17 1.8 1.5 17 8.2 a450 190 .9 .5 .4 18 1.8 1.5 18 7.S a400 137 .7 .5 .3 19 22 1.5 - 16 6.0 a350 131 .7 .5 a. 3 20 12 1.5 17 5.4 a300 172 .5 .5 .3 21 9.4 1.5 16 E9 5.4 a270 163 .4 .5 .3 22 14 3.5 17 21 5.4 a290 165 .3 .5 .4 23 2.5 6.4 17 27 5.4 a300 156 . 2 .5 .4 24 2.2 1.8 16 24 6.0 261 154 .2 .5 .4 25 2.3 1.8 16 26 6.8 235 151 .5 .8 26 4.5 1.8 16 27 6.0 220 174 .2 .5 27 3.5 1.8 15 26 9.8 204 146 '.2 .5 . 28 3.0 2.2 14 21 53 194 138 .7 B 29 2.2 2.5 14 22 41 202 130 .3 .5 a. 30 2.5 2.2 15 - 23 15 206 118 .5 a. 5 31 4.5 - 16 - 23 204 .S .5 - Second- Runoff in Month foot-days Maximum Minimum Mean acre feet October...... 114.6 22"e.4 1.1 3.70 227 November...... 59.6 l.E 1.99 118 December ...... 456.9 18 3.E 14.7 906 Calendar year 1943 ...... 4,617.1 166 0 12.6 9,160 January...... 465 _ _ 15 922 February 406 _ _ 14 805 arch...... 629 _ _ 20.3 1,250 April...... 547.2 53 5.4 18.2 1,090 May...... 6,216 500 11 201 12,330 June ...... 6,002 450 118 200 11,910 July...... 103 .£ 12.0 739 August ...... 16.5 .7 .E .53 33 September...... 13.2 .8 .2 .44 26 Water year 1943-44 ...... 15, 299*. 8 500 .£ 41.8 30,360 * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of weather records and records for stations on streams. Note.- Stage-discharge relation affected by Ice Dec. 24 to Mar. 20 (no gage-height record Dec. 31, Jan. 2 to Mar. 6, Mar. 8-20); discharge computed on basis of 2 discharge measurements, weather records, and records' for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 13 186 GREEN RIVER BASIN

Ashley Creek above springs, near Vernal, Utah

Location.- Water-stage recorder, lat. 40°35'20", long. 109°37'20", In NWiSEi sec. 1, T. 3 s., R. 20 E., 1,000 feet upstream from Ashley Creek Springs, 5 miles upstream from Dry Fork, and 10i miles northwest of Vernal. Drainage area.- 100 square miles. Records available.- May 1941 to September 1944. Extremes.- Maximum discharge during year, 1,260 second-feet May 30 (gage height, 4.52 reet), from rating curve extended above 700 second-feet; minimum discharge observed, 1.2 second-feet Mar, 7. 1941-44: Maximum discharge, 1,400 second-feet May 13, 1941 (gage height, 4.50 feet), from rating curve extended above 860 second-feet; minimum discharge observed, that of Mar. 7, 1944. Remarks.- Records good except those for periods of no gage-height record, which are fair. Flow Is Increased by water released from Oaks Park Reservoir (capacity, 6,250 acre-feet) on Brush Creek and diverted to Ashley Creek Basin for Irrigation. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 a7 6.4 3.0 a2 2.2 6 0 950 260 92 58 2 a7 6.0 3.2 a2 2.2 5 7 960 238 92 58 3 a6 8.2 3.8 a2 2.4 5 4 749 224 90 58 4 a6 7.8 4.0 a2 3.0 5 0 566 199 88 57 5 a6 7.4 4.4 a2 3.8 6 4 557 176 87 57 6 a5 5.4 4.B l.S 4.2 10 603 140 73 51 7 a5 4.4 4.6 1.4 3.6 14 692 129 .71 43 8 5.4 4.4 4.6 1.4 3.6 17 599 116 69 31 9 5.7 5.7 4.4 1.4 3.6 24 657 108 72 26 10 6.4 6.0 4.6 ' 1.4 3.6 38 608 10? 69 29 11 7.1 6,0 4.8 .6 3.6 60 642 92 69 29 12 9.0 5.4 4.8 .6 4.2 113 608 87 68 29 13 7.1 5.4 4.6 .6 4.4 180 632 83 67 29 14 8.2 5.4 4.6 .6 3.8 279 667 76 67 28 15 17 4.8 4.4. .8 3.4 402 637 71 67 28 > a3 . a2 16 9.0 4.6 4.4 .8 a3.4 501 575 67 66 28 17 6.8 .4 4.2 .8 a3.2 461 478 79 76 28 18 6.0 .4 4.2 .6 a3.0 341 441 96 77 28 19 10 .8 4.2 .0 3.0 330 478 98 77 34 20 7.8 .9 4.2 .8 3.4 251 486 113 76 30 21 9.5 .6 4.0 .1 3.2 289 449 112 73 28 22 9.0 .8 3.6 ^ .0 3.0 4iO 394 110 71 28 23 8.5 .0 3.2 .8 3.0 601 354 96 69 28 24 8.5 .6 2.8 .8 3.0 763 351 96 67 27 25 9.0 ,7 2.7 .8 3.4 678 341 112 66 26 26 9.0 .2 2.7 2.1 3.6 547 525 104 62 21 27 10 .0 2.7 2.2 3.6 601 337 99 61 21 28 11 .6 a3 2.2 4.2 631 354 98 61 21 29 12 .6 a3 2,2 6.0 710 289 98 60 20 30 7.8 .8 a3 2.1 6.8 938 268 96 59 11 31 7.4 ~ a3 - 2.1 " 911 ~ 96 58 - Moan Runoff in Month £Sk " Minimum Mean acre-feet

October ...... 249.2 17 5 8.04 494 November ...... 154.6 8.2 2.8 5.15 307 December ...... 119.5 4.8 2.7 3.85 237 Calendar year 1943 ...... 17,00^.3 960 - 46.5 33,730 Januarv ...... 93 _ 3 184 Febr uary ...... 58 2 115 March...... 57.2 2.2 1.4 1.85 113 April...... 107.4 6.8 2.2 3.58 213 May...... 10,128.5 938 5.0 327 20,090 June ...... 16,247 960 268 - 542 32,230 July...... 3,671 260 68 118 7,280 August ...... 2,220 92 58 71.6 4,400 September...... 990 58 11 33.0 1,960 Water year 1943-44 ...... 34,095.4 960 1.4 93.2 67,620 a No gage-height record; discharge computed on basis of discharge measureme nt made Jan. 2, weather recsrds, and records for stations near Vernal and at Sign of the Maine, near Vernal. Time basii: Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 187

Ashley Creek near Vernal, Utah Location.- Water-stage recorder, lat. 40°34'50", long. 109°37'20'1 , in SEi sec, 1, T. 3 S., R. 20 E., three-quarters of a mile upstream from head of Utah Power & Light Co.'s canal, 44 miles upstream from Dry Fork, and 10 miles northwest of Vernal. Drainage area.- 101 square miles. Records available.- June 1914 to September 1944. March 1900 to December 1904 (fragnien- tary) at site just downstream from Dry Fork. October 1911 to June 1914 at power plant Ik miles downstream. Average discharge.- SB years (1914-16, 1918-44), 106 second-feet. Extremes.- Maximum discharge during year, 1,200 second-feet June 2 (gage height, 5.86 feet); minimum, 16 second-feet Mar. 27. 1911-44: Maximum discharge, 2,050 second-feet my 29, 1921; minimum recorded, 16 second-feet Mar. 21, 1937, Mar. 21, 1943, Mar. 27, 1944. Remarks.- Records good. Flow is increased by water released from Oaks Park Reservoir (capacity, 6,250 acre-feet) on Brush Creek and diverted to Ashley Creek Basin for Irrigation. City of Vernal p-lpe line (capacity, approximately 5 second-feet) diverts water from tributary spring 1,000 feet above station (diversion began Aug. 1, 1941). At times, part of this flow Is returned to Ashley Creek half a mile below gage.

Rating tables, water year 1943-44 (gage height, in feet, in feet, and discharge, in second-feet) Oct. 1 to June 2 June 3 to Sept. 30 0.9 14 1-4 52 2.5 340 1.3 38 1.0 19 1.5 66 3.0 595 1.4 51 1.1 25 1.7 103 3.5 925 1.5 66 1.2 32 1.9 151 4.0 1,310 Hot e.- Same as ppe 1.3 41 2.2 235 ceding table above 1.5 feet.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 35 33 25 23 20 is IS 22 1,010 340 169 105 Z 35 32 26 23 20 is IS 23 1,020 317 167 105 3 35 35 25 23 20 le 18 23 S06 310 167 97 4 35 36 25 23 20 18 20 23 649 2S1 164 91 5 34 35 25 23 20 is 21 24 637 261 159 99 6 34 31 26 23 20 18 23 30 668 220 144 95 7 32 28 26 23 19 18 23 37 759 205 141 S3 8 32 29 26 23 A9 IS 22 45 668 191 138 69 9 32 31 25 23 19 IS 22 56 720 ISO 141 66 10 32 32 25 23 IS 18 21 74 688 174 136 68 11 33 31 25 22 18 18 21 99 720 169 134 66 12 36 30 26 22 IS 18 22 164 674 164 134 64 13 34 29 26 21 18 18 23 220 688 159 134 63 14 35 29 26 21 18 IS 22 325 720 146 131 63 15 44 29 25 21 18 18 21 459 688 146 128 63 16 36 28 25 21 IS 17 21 565 625 141 126 62 17 34 26 25 21 18 17 21 524 -541 159 138 62 18 32 26 25 21 18 18 21 405 490 172 138 63 19 39 29 25 21 18 18 20 387 529 174 " 138 69 20 36 29 25 21 18 18 20 317 5*7 197 136 66 21 37 28 25 21 18 18 20 357 507 194 134 64 22 3S 28 24 21 18 17 19 479 454 194 128 63 23 36 28 24 21 18 17 19 674 414 174 128 63 24 36 26 23 21 18 17 18 827 419 174 ' 124 62 25 3S 28 23 21 18 18 19 740 410 194 121 60 26 3S 26 23 21 18 18 19 607 589 183 117 54 27 39 25 23 20 18 17 20 655 410 177 114 54 28 40 26 23 20 18 18 20 694 419 172 114 54 29 42 26 23 21 18 17 22 813 374 ISO 110 52 30 39 25 23 21 - 17 22 9S5 348 172 108 46 31 36 - 23 20 - 18 - 978 - 172 108 - Second- Runoff in Month foot-days Maximum Minimum Mean aore-feet

October ...... 1,114 44 32 35.9 2 210 November ...... S78 36 25 29 .3 1*740 December ...... 764 26 23 24.6 1,520 Calendar year 1943 ...... 31,298 507 17 85.7 62,080 January ...... 670 23 20 21.6 1,330 February...... 537 20 18 18.5 1,070 March...... 550 18 17 17.7 1,090 April...... 616 23 18 20.5 1,220 May...... 11,621 965 22 375 23,050 June ...... 18,191 1,020 348 606 36,080 July...... 6,092 340 141 197 12,080 August ...... 4,169 169 108 134 8,270 September ...... 2,091 105 46 69.7 4,150 Water year 1943-44 ...... 47,293 1,020 17 129 93,810 Time basis; Mountain war time. To convert war tin standard time, subtract 1 hour. GREEN RIVER BASIN

Ashley Creek at Sign of the Maine, near Vernal, Utah

Location.- Water-stage recorder, lat. 40°31', long. 109°36', in NEi sec. 31, T. 3 S., R. 21 E., three-quarters of a mile downstream from Dry Fork and 4f Miles northwest of Vernal. Records available.- June 1939 to September 1944. Extremes.- I-Jaximum discharge during year, 1,880 second-feet May 3 (gage height, 4.68 feet ) ; minimum recorded, 15 second-feet Mar. 9. 1939-44: Maximum discharge, 2,000 second-feet May 26, 1942 (gage height, 4.72 feet); minimum, that of Mar. 9, 1944. Remarks.- Records good except those for periods of 1ce effect, which are- fair. Flow in­ creased by water released from Oaks Park Reservoir (capacity, 6,250 aere-feet) on Brush Creek and diverted to Ashley Creek Basin for irrigation. Diversions above sta­ tion for irrigation.

ing Df Ice effect (gage height, In feet, and discharge, In second-feet) 1 to May 30 May 31 to Sept. 30

1.6 3.2 620 1.2 34 2.0 140 3.2 616 1.9 141 3.6 900 1.4 53 2.3 214 3.6 900 1.0 28 2.2 207 4.0 1,230 1.6 76 2.6 313 4.0 1,230 1.2 43 2.5 294 4.4 1,600 1.8 104 2.9 445 4.4 1,600 1.4 63 Z.B 40S

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 37 37 31 »28 23 23 27 34 1,550 701 1S2 106 2 36 37 32 29 23 23 27 32 1,500 667 180 104 3 34 37 30 29 23 22 30 30 1,280 641 174 96 4 34 39 30 27 23 22 34 29 980 573 167 92 5 34 38 30 26 23 22 37 30 948 515 164 98 6 34 36 31 26 ' 23 22 37 36 1,020 435 147 94 7 34 33 30 27 22 a21 34 41 1,360 393 138 85 8 34 32 30 26 22 »20 31 47 1,140 353 134 76 9 34 34 29 26 22 20 30 54 1,180 325 134 68 10 34 36 30 26 21 21 29 74 1,120 302 132 69 11 36 35 29 24 20 23 28 99 1.2SO 274 130 68 12 37 34 30 24 20 23 29 161 1,230 254 129 65 13 35 34 30 23 20 24 34 245 1,230 238 127 63 14 34 *33 29 23 20 24 30 383 1,3SO 223 , 127 62 15 41 33 29 23 20 24 27 608 1,360 200 125 62 16 3S 33 29 23 20 23 28 806 r,290 172 123 61 17 37 32 29 24 20 22 29 S6S 1,070 ISO 132 61 18 35 32 2S 24 20 23 28 656 924 190 134 63 19 46 33 29 24 30 23 27 638 1,020 190 134 68 20 41 33 29 24 20 24 28 522 1,120 226 132 65 21 41 34 29 24 21 23 28 549 1,080 232 130 65 22 44 35 29 24 22 23 27 722 916 235 130 64 23 41 35 29 24 23 23 25 948 820 209 129 64 24 41 34 27 24 24 24 26 1,130 820 209 127 63 25 - 41 34 27 24 23 24 27 l.OSO S36 235 123 63 26 41 32 27 24 24 23 27 860 1,280 217 119 58 27 42 32 27 23 - 24 23 26 940 908 209 118 57 28 43 31 26 23 22 26 32 1,030 836 200 116 56 29 45 32 27 24 22 23 41 1,180 771 198 112 56 30 43 30 27 24 - 24 40 1,560 722 192 111 51 31 41 - 27 23 - 26 1,600 - 190 109 - Seccnd- Runoff in Month f cot-days Maximum Minimum Mean acre-feet

October...... 1,188 46 34 38.3 2,360 November...... 1,020 39 30 34-0 2,020 December ...... 896 32 26 28. 9 1,780 Calendar year 1943 ...... 39,979 790 24 110 79,300 January...... 767 29 23 24.7 1,520 February...... 630 24 20 21.7 1,250 March...... 711 26 20 22.9 1,410 April...... 903 41 25 30.1 1,790 May...... 16,992 1,600 29 546 33,700 June ...... 32,971 1,550 722 1,099 65,400 July...... 9,378 701 172 303 18,600 August ...... 4,169 182 109 134 8,270 September ...... 2,123 106 51 70.8 4,210 Water year 1943-44 ...... 71,746 1,600 20 196 142,300 * Winter, discharge measurement made on this day. a No gage-height record; discharge Interpolated. Mote.- Stage-discharge relation affected by Ice Dec. 28, 29, Jan. 4 to Feb. 22. Time basIs; Mountain war time. To convert war time to standard time, subtract 1 hour. RIVER BASIN 189

Ashley Creek Spring near Vernal, Utah

Location.- Water-stage recorder, lat. 40°35'10", long. 109°37'20", In NWiSEi sec. 1 T. 3 S., R. 20 E., 350 feet upstream from Ashley Creek and 10i miles northwest of Vernal. Records available.- October 1943 to September 1944. Extremes.- Maximum discharge during year, 49 second-feet June 1-7; minimum dally, 15 second-feet on many days January to April. Remarks.- Records good. This spring Is the largest spring In the Ashley Creek spring area. Total flow of Ashley Creek spring area may be obtained by subtracting the flow for Ashley Creek above springs, near Vernal, from the flow for Ashley Creek near Vernal. City of Vernal pipe line (capacity, approximately 5 second-feet) diverts from spring immediately above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 a24 23 21 18 16 15 15 17 49 46 44 38 2 a24 23 21 18 16 15 15 18 49 46 44 38 3 a24 24 21 18 16 15 16 IS 49 46 44 35 4 a24 25 20 18 16 15 16 18 49 46 44 33 5 a24 24 20 IS 16 15 17 IS 49 46 44 37 6 a24 23 20 18 16 15 18 21 49 46 44 36 7 a 23 22 20 18 16 15 IS 25 49 46 44 36 8 a23 22 20 17 16 15 18 28 48 46 44 36 9 a23 23 20 17 16 15 IS 33 47 46 44 36 10 a23 23 20 17 16 15 17 36 47 46 43 35 11 a24 23 20 17 15 15 17 38 47 46 43 35 12 a24 22 20 17 - 15 15 17 40 47 46 43 34 13 a24 22 20 16 15 15 IS 41 47 46 43 34 14 24 22 20 16 15 15 17 43 47 46 43 33 15 24 22 19 16 15 15 17 45 47 45 42 33 16 24 21 19 16 15 15 17 45 47 45 42 31 17 24 21 19 16 15 15 17 46 47 45 42 31 18 23 21 19 16 15 16 17 46 47 45 42 31 19 24 21 19 16 15 16 17 46 47 44 42 31 20 25 21 19 16 15 15 17 44 47 44 42 31 21 25 21 19 15 15 16 17 44 47 44 41 31 22 25 21 19 15 15 15 17 46 46 44 41 30 23 25 21 IS 15 15 15 16 46 46 44 41 30 24 24 21 18 15 15 15 16 46 46 44 41 30 25 25 21 IS 16 15 15 16 46 47 44 41 29 26 25 21 IS 16 15 15 16 46 47 44 40 88 27 25 20 18 16 15 15 16 46 46 44 40 28 28 25 21 18 16 15 15 16 46 46 44 40 28 29 26 21 IS 16 15 15 16 47 46 44 40 27 30 26 21 18 16 - 15 17 47 46 44 39 27 31 25 - 18 16 - 15 - 48 - 44 38 -

Second Runoff in Month foot-days Maximum Minimum Mean acre- feet

October...... 752 26 23 24.3 1,490 November...... 657 25 20 21.9 1,300 December ...... 597 21 18 19.3 1,180 Calendar year ...... _ _ _ _ _ January...... 511 18 15 16.5 1,010 February...... 445 16 15 15.3 883 arch...... 468 16 15 15.1 928 April ...... 502 18 15 16 7 996 May...... 1,174 48 17 37.9 2,330 June...... 1 418 49 46 47 3 _July...... 1 396 46 44 45.0 2J770 August ...... ilsos 44 38 42.1 2,590 September...... 972 38 27 32.4 1,930 Water year 1943-44 ...... 10,197 49 15 27.9 20,220 a No gage-height record; discharge computed on basis of flow In Ashley Creek. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 190 GREEN RIVER BASIN

Dry Fork above sinks, near Dry Fork, Utah

Location.- Water-stage recorder, lat. 40°38', long. 109°49', in sec. 20, T. 2 S., R. 19 E. (unsurveyed) 14 miles upstream from mouth and 9 miles northwest of Dry Fork. Drainage area.- 48.0 square miles. Records available.- March 1939 to September 1944. Extremes.- Maximum discharge during year, 784 second-feet June 26 (gage height, 4.54 feet), from rating curve extended above 350 second-feet; minimum not determined (occurred during perioc of no gage-height record). 1939-44: Maximum discharge, that of June 26, 1944; minimum, not determined (occurred during period of no gage-height record). Remarks - Records good except those for periods of ice effect or no gage-height record, *vhich are fair.

Rating.ng table, watewater year 1943-44, except periods of iceIce efeffect (gage height, In feet, and discharge, In second-feet) 1.6 7.0 2.4 3.3 199 1.8 11 2.6 3.6 303 2.0 18 2.8 3.9 438 2.2 3.0 4.3 650

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept..A

1 11 8 414 303 35 14 2 11 9 307 303 34 14 3 11 9 248 288 33 14 4 11 10 227 244 31 14 5 11 12 051 214 30 13

6 10 + 14 303 188 28 13 7 10 blO 16 376 158 27 13 8 11 19 273 142 27 12 9 11 24 276 126 31 12 10 10 27 307 114 27 12 11 13 d34 366 105 25 12 12 14 d42 363 97 24 12 13 *13 d55 404 86 24 12 14 15 (*) d70 498 75 23 12 15 13 92 514 69 22 11 ' 8 7 1 7 > 8 16 12 146 438 65 22 11 17 11 182 337 63 22 10 18 10 164 303 61 22 12 19 b!5 137 400 61 22 16 20 b!3 118 468 97 22 13 21 b!5 (*) 120 438 76 21 12 22 b!3 9 139 350 66 20 11 23 b!2 166 320 61 20 10 24 10 208 345 62 19 10 25 blS 234 363 59 19 10 26 b!3 218 634 50 18 10 27 b!5 244 345 47 17 10 28 b!6 273 328 40 16 9.0 29 17 368 316 40 15 9.0 30 14 _ 488 311 38 15 10 31 10 - - - 478 - 37 14 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 383 17 10 12.4 760 November...... 383 9.4 561 December...... 248 _ _ 8 492 Calendar year 1943 ...... 11,237 27,2 _ 30.8 22 ,280 January ...... 217 7 430 February ...... 203 7 403 March...... 217 _ 7 430 April ...... 240 8 476 May...... 4,124 488 8 133 8,180 June ...... 10*825 634 227 361 21,470 July...... 3,439 303 37 111 6,820 August ...... 725 35 14 23*4 1,440 September ...... 353.0 14 9.0 11.8 700 Water year 1943-44 ...... 21,257.0 634 - 58.1 42,160 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. d Doubtful gage-height record; discharge computed on basis of records for1 Ashley Creek above springs, near Vernal. Note. - Ho gage-height record Nov. 14 to May 5 (stage-discharge relation probably affected t>y ice during entire period); discharge computed on basis of 1 discharge measurement, 1 field estimate, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 191 Dry Pork below springs, near Dry Fork, Utah

Location.- Water-stage recorder, lat. 40°34', long. 109°4£', In NWiSEi sec. 8, T. 3 S., K. iju t;., 6 miles upstream from mouth and i£ miles northwest of Dry Fork. Records available.- April 1941 to September 1944. Extremes.- Maximum discharge during year, 720 second-feet June 26 (gage height, 4.82 reet); no flow at times. 1941-44: Maximum discharge, that of June 26, 1944; no flow for long periods In each year. Remarks.- Records fair. No diversion above station. Cooperation.- Several staff-gage readings furnished by Bureau of Reclamation.

Rating table, water year 1943-44 (gage height, in feet, and discharge, in second-feet) 1.3 2.0 8.3 3.3 156 1.4 .2 2.2 18 3.6 234 1.5 .5 2.4 29 4.0 366 1.6 1.0 2.6 4.4 529 1.8 2.9 2.8 4.9 760 1.9 5.3 3.0 Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 0 604 352 42 Z 0 53S 344 39 3 0 444 327 37 4 0 389 283 33 5 0 416 246 30 6 0 457 228 27 7 0 551 209 24 8 0 457 188 21 9 0 452 168 18 10 0 465 154 16 11 0 551 141 14 12 0 547 132 11 13 0 560 120 7.7 14 h31 609 110 5.9 15 h98 636 101 4.3 16 145 586 96 2.7 17 180 512 88 .a 18 152 461 83 .1 19 145 533 79 0 20 118 582 96 0 21 122 582 90 0 22 154 529 86 0 23 203 495 73 0 24 264 508 72 0 25 316 508 70 0 26 280 646 62 0 27 330 461 56 0 28 377 416 52 0 29 461 385 49 0 30 564 370 47 0 31 614 - 44 0 Seoond- Runoff in Month foot-days Maximum Minimum ' Mean acre-feet

October ...... 0 0 0 , ° 0 November...... 0 0 0 0 0 December ...... 0 0 0 0 0 Calendar year 1943 ...... 7,968 340 0 21.8 15,800 January...... 0 0 0 0 0 February...... 0 0 0 0 0 March ...... 0 0 0 0 0 Apri 1...... 0 0 o 0 0 Hay 4,554 614 0 147 9,030 June ...--..------.-----.-- . . - . . - 15,250 646 370 508 30,250 July 4,246 352 44 137 8,420 Auguat ...... 333..B 42 0 10.8 661 September...... 0 0 0 0 0 Water year 1943-44 ...... 24,383.5 646 0 66.6 48,360 h Computed from staff-gage readings. Time basis; Mountain war time. To convert war time to standard time, ubtraet 1 hour. 192 GREEN RIVER BASIN

Duchesne River near Tablona, Utah

Location.- Water-stage recorder, lat. 40°18'00", long. 110°36'10", In SWiSEi sec. 18, T. ' 2 S., R. 6 W. Ulnta meridian, at bridge on State Highway 35, 6* miles upstream from Rock Creek and 8 miles southeast of Tablona. Drainage area.- 352 square miles. Records available.- January 1919 to September 1944. Average discharge.- 25 years, 208 second-feet. Extremes.- Maximum discharge during year, 1,300 second-feet June 1 (gage height, 6.74 feet); minimum dally, 65 second-feat Aug. 14-17. 1919-44: Maximum discharge observed, 2,500 second-feet June 13, 1921, from rating curve extended above 1,100 second-feet; minimum recorded, 27 second-feet Oct. 17, 1934. Remarks.- Records good except those for periods of Ice effect, which are fair. Several diversions above station for Irrigation.

Ratine tables, water year 1943-44, except periods of ice effect (gage height, in feet, and discharge, in second-feet) (Shifting-control method used flay 27 to June 10) Oct. 1 to Jan. 24 Jan. 85 to Sept. 30 3.9 S9 3.6 57 4.9 36S 4.0 106 3.S SI 5.3 526 j 4.1 126 4.0 113 5,6 666 4.2 149 4.2 156 6.0 885 4.4 202 4.5 236 6.5 1,220 Discharge, in second- feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 89 142 122 108 98 144 164 1,180 579 106 98 2 S9 13S 120 106 »96 140 158 1,120 552 104 96 3 89 144 US 99 96 171 147 95S 530 99 101 4 89 147 116 10S 98 200 140 749 4S4 99 98 5 89 147 116 1M. 94 219 174 671 444 94 93 . bllO 6 92 144 122 106 93 200 225 712 413 S6 92 7 94 131 116 101 96 168 282 S67 372 So 90 8 96 135 122 104 96 154 325 861 346 78 92 9 101 147 110 108 103 144 350 891 322 77 90 10 103 142 116 101 121 144 436 909 295 74 8S 11 120 142 114 98 147 166 448 843 272 71 86 12 133 140 112 blOO 127 168 4S4 S49 251 67 86 13 126 13S 110 blOO 111 154 579 903 233 66 S4 14 124 135 110 b98 108 142 671 939 216 65 82 15 123 133 106 b98 108 123 885 939 205 65 81 , bino 16 11 S 133 108 b96 101 142 97S 933 189 65 32 17 120 133 110 blOO 121 131 1,010 798 174 65 S4 18 120 133 114 b98 135 135 786 728 158 68 90 19 191 131 114 b98 121 127 666 7S6 158 81 92 20 154 131 112 b9S 113 140 570 S61 166 87 92 21 156 126 112 99 104 133 530 873 154 82 92 22 156 135 112 99 103 127 584 770 144 104 90 23 149 133 104 > bllO 99 110 127 702 702 140 101 90 24 152 131 110 99 119 135 792 692 135 101 93 25 152 131 116 99 94 138 855 712 131 104 94 26 152 122 112 110 94 104 133 803 997 129 99 93 27 152 110 112 los 99 103 >144 S97 808 125 96 93 28 156 122 bllO ill 96 96 142 903 676 111 99 93 29 159 114 bllO 110 99 108 156 1,030 627 111 99 94 30 154 112 »bl!8 bllO 140 171 1,120 603 110 93 94 31 149 bl20 bllO 166 1,140 108 94 Seccnd- u a. Runoff in Month fcct-days Maximum Minimum *ean acre-feet Octc ber...... 3,946 191 89 127 7,830 Neve mber...... 4,002 147 110 133 7,940 Deoember...... 3,524 122 104 114 6,990 Calendar year 1943 92,902 1,200 50 255 184,300 Janu ary 3,309 107 6,560 Febr 2, 90S 108 94 100 5,770 Marc h...... 3,430 166 93 111 6,SOO Apr! 1...... 4,518 219 123 151 8,960 May. 18,834 1,140 140 608 3.7,360 June 24,957 1,180 603 832 49,500 July 7,757 579 108 250 15,390 Augu st...... 2,669 106 6£ 86.1 5,290 September ...... 2,723 101 81 90.8 5,400 Iteter year 1943-44 ...... 82,578 1,180 65 226 163,800 » Winter discharge measurement made on this day. b Stage -discharge relation affected by ice (no gage-height record Jan. 7-25; discharge computed on basis of records for stations on nearby streams). Time basis: Mountain war time. To convert war time to standard -time, subtract 1 hour. GREEN RIVER BASIN 193

Duchesne River at Duchesne, Utah

Location.- Water-stage recorder, lat. 40°09'55", long. 110°23'50", in SWiNEi sec. 1, T. 4 s., R. 5 W. Uinta meridian, at Duchesne, half a mile upstream from Strawberry River. Drainage area.- 660 square miles. Records available.- December 1917 to September 1944. Average discharge.- 27 years, 373 second-feet. Extremes.- Maximum discharge during year, 3,000 second-feet June 26 (gage height, 5.11 reet): minimum, 89 second-feet Aug. 17. , 1917-44: Maximum discharge observed, 4,420 second-feet June 10, 1922 (gage height. 8.65 feet, site and datum then in use); minimum observed, 15 second-feet July 11, 1931. Remarks.- Records good except those for period of ice effect, which are fair. Diversions aoove station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 128 230 1S6 160 242 255 2,300 1,370 179 12S 2 12S 221 183 #170 217 242 2,160 1,350 1S3 116 3 128 230 179 170 234 226 1,S10 1,290 175 125 4 125 23S 183 170 269 209 1,300 1,150 172 125 5 125 23S 1S3 160 307 221 1,150 1,040 158 122 6 133 230 166 160 307 230 1,210 921 149 116 7 128 2-13 179 160 269 358 1,540 S22 142 114 8 130 209 183 160 251 439 1,530 742 165 111 9 133 230 172 180 23S 483 1,460 670 165 111 10 136 221 183 210 234 592 1,470 615 149 108 11 16S 217 133 255 246 639 1,360 557 114 111 12 1S6 213 172 234 255 694 1,410 522 106 106 13 183 205 186 213 251 822 1,560 476 101 103 14 175 205 190 213 230 960 1,710 433 98 98 15 179 205 201 213 205 1,260 1,780 409 96 96 170 160 16 172 201 198 19S 226 1,400 1,850 386 94 96 17 172 201 172 213 221 1,540 1,630 364 91 96 18 175 201 175 251 221 1,220 1,440 342 96 101 19 332 201 217 234 221 1,050 1>600 317 116 116 20 255 198 226 213 226 903 1,880 353 119 111 21 260 194 209 198 234 795 1,910 342 125 111 22 274 213 1S3 186 209 85S 1,670 307 139 111 23 246 221 175 198 205 1,020 1,490 297 136 108 24 251 205 172 209 213 1,140 1,470 287 133 111 25 251 205 201 179 221 1,240 1,580 274 139 111 '179 26 251 194 198 221 1,240 2,340 255 133 108 27 242 175 186 183 226 1,400 2,100 246 128 106 28 251 1S3 165 168 234 1,530 1,580 234 125 106 29 269 183 *160 179 246 1,810 1,500 226 122 108 30 264 175 160 - 194 260 2,060 1,420 217 1L9 119 31 251 - 180 - 260 - 2,160 201 119 Second Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 6,101 332 125 197 12,100 November ...... 6,255 238 175 2QS 12,410 December ...... 5,726 226 160 1S5 11,360 Calendar year 1943 ...... 156,026 2,270 76 427 309 , 500 January 5,270 170 10,450 February...... 4,640 _ _ 160 9,200 Maroh...... 6,070 260 160 196 12,040 April ...... 7,139 307 205 23S 14,160 May...... 28,996 2,160 209 935 57,510 June ...... 49,210 2,340 1,150 1,640 * 97,610 July ...... t ...... 17,015 1,370 201 549 33,750 August ...... 4,086 1S3 91 132 8,100 September ...... 3,309 126 96 110 6,560 Water year 1943-14 ...... 143,817 2,340 91 393 285,200 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Dec. 29 10 (no gage-height record Jan. 1 to Feb. 29; discharge computed on basis of weather records cords for stations near Tabiona and at Myton). Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 194 GREEN RIVER BASIN

Duchesne River at Myton, Utah

Location.- Water-stage recorder, lat. 40°12', long. 110°03', In NWi sec. 25, T. 3 S., R. 2 w. ulnta meridian, at Myton, 3 miles downstream from Lake Fork. Drainage area.- 2,750 square miles. Records available.- October 1899 to September 1944 (fragmentary 1903-11). Records of montniy aiscnarge prior to October 1938 have been republlshed, with some revisions, In Water-Supply Paper 918. Average discharge.- 36 years (1899-1902, 1911-44), 624 second-feet. Extremes.- Maximum discharge during year, 5,790 second-feet June 26 (gage height, 6.56 feet), from rating curve extended above 4,000 second-feet;- minimum, 49 second-feet Aug. 17, 18. 1899-1944: Maximum discharge observed, 12,800 second-feet June 10,,1922 (gage height, 7.94 feet), from rating curve extended above 8,000 second-feet; minimum dis­ charge, less than 1 second-foot July 16, 1931, and on several days In August and September 1934. Remarks.- Records good except those for periods of Ice effect, which are fair. Large diversions above station for Irrigation. Flow affected by reservoirs above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. »Apr. May June July Aug. Sept. 1 77 274 296 300 380 604 519 2,820 2,760 168 64 2 72 270 300 274 410 544 532 2,710 2,800 135 61 S 69 296 287 287 410 564 558 2,600 2,780 119 61 ' 54 69 304 279 (*) *400 675 476 2,060 2,390 100 66 69 300 287 380 751 482 1,780 2,140 86 61 6 69 279 309 380 720 618 1,680 1,300 72 59 7 72 262 318 380 61S 815 2,060 1,560 64 59 8 56 238 318 380 544 1,110 2,220 1,360 54 59 9 59 274 304 430 519 1,860 2,000 1,120 69 61 10 61 283 304 500 525 1,360 2,120 990 66 66 11 74 287 322 600 488 1,470 1,830 892 59 66 12 SB 287 304 580 519 1,440 1,900 735 52 59 13 83 279 287 520 551 1,560 2,080 570 52 52 14 83 274 292 520 476 1,770 2,320 420 54 52 15 100 262 287 520 420 2,1QO 2,570 399 54 54 300 16 103 254 279 480 359 2,430 2,640 359 52 54 17 103 250 250 270 520 436 2,570 2,450 336 49 52 18 97 258 223 625 399 2,280 2,210 30Q 49 54 19 612 258 313 564 420 1,910 2,380 283 56 59 20 448 258 369 488 384 1,670 3,340 279 59 59 21 318 254 389 426 494 1,420 3,640 350 69 59 22 331 270 364 399 414 1,360 3,310 279 72 59 23 309 316 350 409 374 1,500 2,890 254 72 59 24 296 279 296 448 374 1,790 2,890 266 66 83 25 300 266 292 394 384 1,900 3,140 274 72 91 26 274 258 313 336 384 1,760 4,270 219 64 91 27 258 223 296 345 394 1,760 4,280 204 64 91 28 262 219 230 313 448 1,900 2,690 186 61 91 '29 287 270 230 327 507 2,170 2,740 179 61 97 327 279 254 - 409 494 2,490 2,760 155 66 97 30 ~ " ~ ~ ~ 31 292 292 577 2,740 165 66 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 5,718 618 56 184 11,340 November...... 8,083 318 219 269 16,030 December...... 9,234 389 223 298 18,320 Calendar year 1943 ...... 191,383 2,700 28 524 379,600 January...... 8,421 272 16,700 February...... 8,700 _ _ 300 17,260 March...... 13,850 ' 625 313 447 27,470 April ...... 14,783 751 359 . 493 29,320 May...... 47,720 2,740 476 1,539 94,650 June ...... 78,430 4,280 1,680 2,614 156,600 July...... 26,804 2,800 155 865 53,160 August ...... 2,202 168 49 71.0 4,370 September...... 1,996 97 b2 66.5 3,960 Water year 1943-14 ...... 225,941 4,280 52 617 448,200 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ice Jan. 4 to Mar. 17 (no gage-height record Jan. 8 to Mar. 4; discharge computed on basis of weather records and records for stations upstream). Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 195 Duchesne River near Randlett, Utah

Location.- Water-stage recorder, lat. 40°l3', long. 109°47', in SEiSEi sec. 17, T. 3 S., R. 2 E. Uinta meridian, a quarter of a mile downstream from Uinta River, li miles southeast of Randlett, and 6| miles southeast of Port Duchesne. Drainage area.- 3,920 square miles. Records available.- October- 1942 to September 1944. Extremes.- 1942-43: Maximum discharge during water year, 4,150 second-feet June 2 (gage height, 5.04 feet); minimum, 108 second-feet Sept. 6, 7. .1943-44: mximurn daily discharge during water year, 7,000 second-feet June 27, based on records for Duchesne River at Mytoni and Unita River at Fort Duchesne; minimum dally discharge, 80 second-feet Aug. 17. Remarks.- Records fair. Flow regulated by several reservoirs. Diversions above station for irrigati on .

Discharge, In second-feet, 1942-44 1942-43

DEI; Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 177 1 180 -312308 374 490 450 495 413 1,530 2,540 1,100 348 Z ISO 446 485 450 495 406 2,050 3,950 1,000 511 152 3 170 301 436 413 500 490 408 2,500 2,960 900 564 141 4 150 294 352 418 450 490 413 2,870 2,240 eoo 446 126 5 140 294 332 350 450 500 432 2,960 2,170 750 574 113 6 140 308 332 350 450 495 446 2,370 dl,700 700 500 112 7 150 328 332 375 450 490 436 1,930 1,400 600 460 112 8 150 344 391 375 450 506 451 1,760 1,300 550 615 114 9 150 348 436 350 450 644 446 1,640 1,300 500 456 114 10 150 324 511 350 425 776 511 1,340 1,400 450 404 123 IX 150 308 548 400 425 521 500 1,210 1,600 425 506 123 12 200 316 500 425 450 485 441 1,110 1,600 400 570 US 13 300 352 475 450 450 511 461 1,230 1,600 375 511 148 14 490 374 466 450 450 558 356 1,2SO 1,600 350 391 132 15 461 3S2 466 500 475 542 3S6 1,870 1,500 350 290 183 16 413 374 480 500 475 400 466 1,260 1,400 400 305 US 17 408 356 485 b450 500 395 626 1,140 1,300 400 312 US 18 386 382 500 b350 550 461 701 dl,030 1,200 375 320 116 19 395 427 475 b250 575 423 820 d950 1,500 350 532 114 20 395 432 475 b300 600 395 905 dS50 1,700 300 564 116 21 382 432 475 b350 650 400 996 dSOO 1,820 325 .391 119 22 378 365 427 b450 675 408 1,010 d800 1,760 325 316 124 23 352 386 495 b600 714 40S 1,020 d825 1,700 325 297 123 24 344 456 495 b500 688 400 1,210 d945 1,700 300 248 123 25 348 446 475 b450 621 418 1,270 1,240 1,600 275 222 123 26 344' 395 466 b450 692 432- 1,250 1,650 1,500 275 204 143 27 352 378 404 b475 526 441 1,170 1,920 1,700 265 196 182 28 34S 466 361 bSOO 485 427 1,140 2,140 1,400 241 1S2 202 29 352 404 532 b500 . 470 1,220 2,400 1,300 248 158 219 30 336 413 521 b500 _ 470 1,260 2,750 1,400 316 2S2 226 31 312 446 b475 - 441 - 2,630 - 340 207 - b Stage-discharge relation affected by ice. d Doubtful gage-height record; discharge based on, record for station at Myton. Note.- No gage-height record Oct. 1-13, Jan, 5-16, Feb. 1-22, June 7-20, June 23 to July 25J charge baaed on record for station,at Myton. 196 GREEN RIVER BASIN

Discharge, In second-feet, of Ducheane River at Randlett, Utah, 1942-44 -Continued 1949-44 Day Oct. Nov. Deo. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 238 400 427 410 570 1,000 776 4,860 4,540 280 ' 102 2 219 391 418 370 590 900 776 4,580 4,630 240 104 3 219 400 378 «400 590 920 828 4,600 4,400 210 107 4 229 423 348 378 580 1,100 748 3,460 3,850 170 107 5 219 436 365 279 560 1,300 748 2,830 3,420 150 110 6 207 395 441 324 560 1,200 905 2,820 2,760 130 107 7 199 374 470 400 560 1,000 1,200 3,920 2,260 120 105 S 180 352 466 560 900 1,340 4,330 1,930 110 107 9 172 413 395 700 840 1,530 3,640 1,500 140 105 10 190 418 395 800 860 1,800 3,480 1,400 dlSO 97 11 204 395 441 950 800 1,950 3,280 1,100 dlOO 105 12 265 374 441 900 850 1,880 3,320 873 d84 104 13 279 382 391 840 900 1,950 3,410 727 86 97 14 265 404 400 840 780 2,170 4,050 542 90 89 15 251 382 395 840 670 2,680 4,440 511 86 87 450 16 255 374 427 *780 575 3,110 4,520 475 84 89 17 261 374 378 840 727 3,320 4,020 475 80 98 18 241 395 272 1,000 688 3,060 3,410 418 86 100 19 697 395 386 1 580 920 720 2,400 3,670 395 96 113 20 762 395 485 800 644 2,180 4,930 436 100 154 21 586 395 548 700 769 1,900 5,440' 570 110 126 22 632 408 506 640 688 1,700 5,120 506 110 122 23 609 516 495 660 626 1,900 4,330 475 104 120 24 537 427 408 720 621 2,120 4,240 475 105 122 25 516 391 395 640 615 2,360 4,630 542 118 151 28 470 4i3 408 540 615 2,250 d6,400 480 113 156 27 456 386 365 560 605 2,080 7,000 369 114 156 28 466 374 300 520 688 2,580 4,700 348 114 156 29 470 378 300 540 798 3,210 4,600 312 104 158 30 475 369 330 - .660 921- 4,210 4,520 270 109 165 31 427 - 400 - 940 - 4,920 - 280 113 - * Winter discharge measurement made on this day. d Doubtful gage-height record; discharge computed on oasis of record for station at Hyton. Note.- No gage-height record Dec. 26 to Jan. 2, Mar. 18 to Apr. 15, May 21-23, June 27, 28, July 30 to Aug. 9, Aug. 13-22; discharge computed on oasis of discharge measurement made Aug. 29 and records for station at Hyton. Stage-discharge relation affected by Ice Jan. 8 to Mar. 17 (no gage- height record Jan. 9 to Mar. 3, Mar. 6-15; discharge computed on oasis of record for station at Hyton). Discharge for period June 29 to July 29 computed from twice-daily readings of temporary staff gage.

Monthly discharge, In second-feet, 1942-44 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet 291 17 860 294 December...... 13,909 548 332 449 27,590 Calendar year ...... _ _ _ _ _

March...... April...... 21,572 1,270 356 719 42,790 Hfw 50,380 2,960 800 51,840 3,950 1,200 1,728 102,800 July...... 14,310 1,100 241 462 28,380 11,702 615 168 377 23,210 September...... 4,096 226 112 137 8,120 Water year 1942-43 ...... 230,314 3,950 112 631 456,800 22 210 December...... 12,574 548 . 272 406 1 24,940 Calendar year 1943 ...... 232,093 3,950 112 636 460,300

March...... 43 440 April ...... '...... May...... July...... 3,786 280 80 September ...... 3,499 165 87 117 6,940 Water year 1943-44 ...... 348,333 7,000 80 952 690,900 Time oasis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 197

Rock Creek near Mountain Home, Utah

Location.- Water-stage recorder, lat. 40°29'30" f long. 110°34'40", In SWi sec. 9, T. 1 N., R. 6 W. Ulnta meridian, at Lower Stlllwater dam site "B", a third of a mile upstream from Corral Creek, 7 miles downstream from South Fork, and 12 miles northwest of Moun­ tain Home. Altitude of gage, about 7,250 feet. Drainage area.- 149 square miles. Records available.- November 1937 to September 1944. Extremes.- Maximum discharge during year, 1,630 second-feet June 26 (gage height, 5.32 reet;; minimum, 21 second-feet Nov. 1 (probably caused by Ice jam above station). 1937-44: Maximum discharge observed, 1,790 second-feet June 4, 1938 (gage height, 11.19 feet, site and datum then In use); minimum discharge, 7 second-feet Mar. 13, 1940, Mar. 20, 1942 (probably caused by Ice Jams above station). Remarks.- Records good except those for period of no gage-height record, which are fair. No diversion above station.

Rating table, water year 1943-44 (gage height, In feet, and discharge, In second-feet) (Shifting-control method used July 11 to Sept. 30) 1.4 2.6 816 1.6 3.0 330 l.S 3.5 510 2.0 4.0 740 2.3 5.1 1,450

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 66 43 41 43 a42 41 45 59 1,030 730 164 73 2 64 4S 41 45 a42 41 44 59 910 745 156 73 3 64 54 41 45 a41 40 48 57 720 695 152 73 4 64 56 41 43 a40 41 55 57 590 650 144 73 5 63 5S 41 44 a40 41 62 63 582 536 133 74 6 63 53 41 46 a41 42 63 84 680 546 134 73 7 61 45 40 42 a43 41 60 114 735 510 132 72 8 63 56 41 42 42 42 54 136 680 474 129 71 9 63 64 38 44 43 44 51 159 690 449 136 63 10 61 60 39 43 41 42 52 208 615 423 127 67 11 67 60 42 44 38 43 52 226 615 400 117 67 12 73 59 40 42 44 41 55 250 655 372 112 67 13 71 60 42 44 41 41 54 309 745 354 110 64 14 66 56 42 44 43 42 52 336 820 334 loe 63 15 66 57 43 44 41 44 48 514 8SQ 318 107 62 16 66 56 42 44 41 41 53 590 910 300 105 62 17 65 55 40 44 44 45 46 655 790 2SS 100 62 18 64 56 47 45 41 45 51 534 760 273 103 66 19 92 53 48 44 42 42 4S 473 946 273 105 71 20 77 52 49 45 41 44 61 410 1,140 291 9S 67 21 32 49 51 44 43 41 ' 4648 365 1,120 264 95 62 22 72 52 50 45 43 40 414 940 246 93 60 23 63 55 48 45 44 44 48 502 910 234 90 59 24 68 51 45 45 44 44 50 526 922 229 87 59 25 66 43 48 45 44 33 .50 590 970 219 90 58 26 64 43 '4448 44 41 43 47 570 1,390 206 87 53 27 62 40 44 43 45 51 630 392 198 83 53 28 66 43 43 41 41 38 52 770 775 188 82 58 29 68 41 46 a40 41 45 58 952 770 180 79 59 30 62 38 45 a39 - 45 60 1,060 775 176 79 67 31 57 - 46 a41 ~ 46 - 1,080 " 166 79 ~ Second- Runoff in Month foct-days Maximum Minimum Mean acre-feet October...... 2,074 92 57 66.9 4,110 November...... 1,568 64 38 52.3 3,110 Deceaber...... 1,353 51 38 43.6 2,680 Calendar year 1943 ...... 70,559 1,190 30 193 140,000 January...... 1,350 46 39 43.5 2,630 February...... 1,215 44 33 41.9 2,410 Haroh...... 1,312 46 38 42.3 2,600 April...... 1,557 63 44 51.9 3,090 May...... 12,857 1,080 57 415 25,500 June ...... 25,057 1,390 582 835 49,700 July...... 11,324 745 166 365 22,460 August ...... 3,421 164 79 110 6,790 September...... 1,936 78 58 66.2 3,940 Water year 1943-44 ...... 65,074 1,390 38 178 1S9.100 a No gage-height record; discharge compute d on basis of records for statior s on nearby streams Time baa is; Mountain war time. To convert war time to standard time, subtract L hour. 198 GREEN RIVER BASIN

Strawberry River.at Duchesne, Utah

Location.- Staff gage, lat. 40°10', long. 110°25', In SWiNEi sec.22, T. 4 S.. R. 5 W. Ulnta meridian, at bridge three-quarters of a mile west of Duchesne and li miles up­ stream from mouth. Drainage area.- 1,040 square miles. Records available.- June 1908 to November 1910, March 1914 to September 1944. Average discharge.- 30 years (1914-44), 163 second-feet. Extremes.- Maximum discharge observed during year, 1,060 second-feet Hay 16 (gage height, 4.98" feet); minimum observed, 50 second-feet Dec. 29, 30. 1908-10, 1914-44: Majcimum discharge observed, 3,230 second-feet my 27, 1922, from rating curve extended above 1,500 second-feet; minimum observed, 1 second-foot several days in July 1931. Revisions.- The figures or maximum discharge observed for some water years have been revised, as shown In the following table. They supersede those published In the water-supply papers Indicated:

Water-Supply Water Gage height Discharge Paper year Date (feet) (second-feet) 829 ...... 1 0^7 7 cpi 1,360 859...... 1 Q'3O 1 Q"3Q ofin 1940 929 ...... 1941 Mav 13 7.30 1.240

Remarks.- Records fair. Gage read twice daily. Diversions above station for irrigation. Water diverted from Strawberry Valley Reservoir (capacity, 250,000 acre-feet) above station to Great Salt Lake Basin. . Revisions.- Revised figures of discharge, in second-feet, for high-water periods In water years 1937, 1938, and 1941 are given herein. They supersede those published In previous water-supply papers.

Day Discharge Day Discharge Day Discharge (water- year) (second -feet) (water year) (second-feet) (water year) (second-feet) 1936-37 1936-37 1937-38 Hay 4. 636 Sept. S. 860 Sept. 6. 641 5. 713 3. 676 9. 860 6. 766 1. 670 1937-38 1940-41 8. . . 945 May 1. 727 May 3. 444 9. 1,060 Z. 663 4. 476 10. . . 1,110 3. 603 5. 549 11. 1,100 4. 485 6. 624 18. 1,120 5. 465 Y, 658 13. . . 1,020 6. 430 8. 696 14. . 1,020 7. 376 9. 810 15. 1,040 12. 358 10. 937 16. 1,110 13. 457 11. 1,010 17. . 1,070 14. 606 13. 1,060 18. 1,060 15. 713 13. 1,190 19. 1,020 16. 860 14. 1,150 SO. 930 17. 835 15. 966 21. 650 16. 74? 16. 778 23. 835 19. 658 17. 675 33. 781 20. 589 18. 662 24. . 771 21. 538 19. 658 25. , 704 23. 513 30. 587 26. . 667 23. 453 31. 484 27. , , 603 24. 430 22. 433 38. . 538 25. 434 33. 484 29. . 532 36. 438 34. 658 30. . 855 37. 473 35. 554 31. 890 2S. 481 26. 500 Aug. 29. . 860 39. 505 27. 512 30. . . 1,220 30. 509 26. 508 Sept.l. 660 31. 481 39. 464

Second- Runoff In Month foot-days Maximum Mean acre-feet May 1937...... 25,984 1,120 638 51,540 5,048 1,220 163 10,010 5,OSO 860 169 10,080 Water year 1936-37..... 74,604 . 1,220 205 148,400 Calendar year 1937..... 76,407 1,220 309 151,600 May 1938...... 16; 140 860 531 32,010 4,074 860 136 e,oso Water year 1937-38..... 58,850 860 161 116,700 Calendar year 1936..... 57,654 S60 158 114,400 May 1941...... 30,093 1,190 648 39,350 Water year 1940-41..... 53,628 1,190 147 106 , 400 Calendar year 1941..... 58,736 1,190 161 116,500 GREEN RIVER BASIN 199

Discharge, In second-feat, of Strawberry River at Duchesne, Utah, water year October 1943 to September 1944

Daj Oot. Nov. Dec. Jan. Feb. Mar. Apr-. May June July Aug. Sept. '62 1 57 83 85 b80 152 212 559 262 87 2 54 75 91 b85 138 260 555 244 83 63 3 51 89 87 b65 171 260 619 228 84 65 4 54 79 88 b85 166 278 571 219 TO 66 5 54 79 79 b80 230 333 493 211 78 66- e 51 81 89 b80 221 443 474 190 76 65 7 51 72 89 b80 183 548 520 170 71 65 8 54 75 91 b80 180 640 456 161 71 65 9 51 79 83 b85 166 678 428 147 70 64 10 64 72 77 *b90 154 815 414 136 69 63 11 60 77 85 b!30 168 811 393 126 68 62 ii 67 72 74 bl20 180 611 376 124 67 63 13 63 74 75 W.10 194 871 366 119 67 65 14 60 72 72 bllO 163 934 350 117 66 64 15 60 75 68 bllO 157 1,020 337 113 66 63 b60 1)70 16 68 72 67 bioo' 160 1,040 324 110 67 63 17 57 72 62 b!30 143 975 309 108 66 65 18 57 74 52 D160 143 831 303 110 68 64 19 369 75 67 b!40 141 747 285 108 69 67 SO 111 74 89 123 149 622 276 108 76 67 21 87 77 97 log 166 596 253 115 72 67 22 67 79 99 89 141 610 250 110 71 66 23 83 79 95 91 141 689 228 108 66 67 24 83 75 75 99 143 707 219 , 108 69 67 25 77 81 60 91 154 683 219 119 67 66 26 77 74 58 87 154 627 262 105 65 66 27 77 75 60 79 154 591 276 97 65 66 26 81 83 57 65 177 579 247 94 65 66 29 87 83 *b50 75 183 571 233 92 64 67 30 83 85 1)50 * _ 95 191 551 219 89 62 66 31 83 1)55 - 152 - 591 - 89 63 - Second- Runoff in Month foot days Maximum Minimum Mean acre-feet October...... 2,398 369 51 77.4 4,760 November...... 2,312 89 72 77.1 4,590 December ...... 2,321 99 50 74.9 4,600 Calendar year 1943 ...... 52,163 840 35 143 103,500 January...... 1,860 60 3,690 February...... 2,030 70 - 4,080 March...... 3,088 160 65 99.6 6,120 April ...... 4,983 230 138 166 9,880 May...... 19,924 1,040 212 643 39,520 June...... 10,814 619 219 360 21,450 OQ July...... 4 f 25V 262 O» iO1 "Vf ( 8,400 August ...... 2,176 87 62 70.2 4,320 September...... 1,951 67 62 65.0 3,870 Hater year 1943-44 ...... 58,094 1,040 50 159 115,200 * Winter discharge measurement made on this day. b Stage-discharge relation affected by lee (no gage-height record Jan. 16 to Feb. 3, Feb. 13 to Mar. 9; discharge computed, on basis of 2 discharge measurements, weather records, and records for Duchesne River at Kyton and other stations on nearby streame. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. zoo GREEN RIVER BASIN Willow Creek near Soldier Springs, Utah Location.- Water-stage recorder, lat. 40°07'05", long. 111°00'35", In SEiNEi sec. 21, T. * s., R. 10 W. Ulnta meridian, 700 feet upstream from mouth and 4i miles southeast of Soldier Springs. Drainage area.- 44 square miles. Records available.-- May 1943 to September 1944. Extremes.- J.94B: Maximum discharge during period May to September, 192 second-feet ouiy 30 (gage height, 2.35 feet), from rating curve extended above 20 second-feet: no flow Sept. 10-30. 1943-44: Maximum discharge during water year, 123 second-feet May 17 (gage height, 2.18 feet), from rating curve extended above 65 second-feet; no flow during several months. Remarks.- Records good except those for period of no gage-height record, which are fair. Discharge, in second-feet, 1943-44 1943 1944 Day «aj June Julj Aug. Sept. May June July Aug. Sept. 1 _ 19 S.6 a7 1 3 0 64 21 4.9 0 3 2 - 22 8.2 a6 1 2 0 67 21 5.1 3 3 - 20 6.2 a5 1 0 0 64 22 5.1 3 4 - 20 7.0 a5 1 0 0 56 20 4.9 2 S - 19 6.4 a6 9 0 51 19 4.6 2 6 . 18 ' 6.4 a6 8 0 51 IS 4.4 .1 7 - 16 5.S 5.2 8 0 52 16 4.0 0 8 - IS 5.2 4.0 7 0 49 16 3.6 0 9 ie 4.9 3.7 3 2.1 49 16 3.6 0 10 - IS 4.3 3.2 0 16 49 14 3.5 0 11 20 19 3.8 3.2 0 14 46 14 3.0 0 12 20 19 3.4 3.1 0 19 47 14 2.9 0 13 20 20 3.1 2.6 0 27 43 12 2.6 0 14 19 20 3.2 2.4 0 45 40 12 2.3 0 15 IS 20 3.7 2.2 0 77 39 12 2.2 0 16 18 IS 3.2 2.2 0 90 38 ' 1 11 1.9 0 17 16 IS 3.0 1.9 0 86 36 10 l.S 0 18 15 17 3.0 1.8 0 66 36 10 l.S 0 19 14 16 2.5 1.5 0 60 35 9.3 1.8 0 20 13 15 2.4 1.4 0 53 33 9.7 1.5 0 21 12 15 3.2 1.3 0 57 31 8.6 1.3 0 22 11 14 3.7 1.2 0 60 29 7.7 1.2 0 23 11 14 3.0 1.2 0 60 29 7.4 1.1 0 24 10 14 2.4 1.2 0 60 26 7.4 1.0 0 25 10 14 2.2 1.2 0 64 26 6.S .9 0 26 9.S 12 1.9 1.2 0 66 31 6.6 .8 0 27 9.4 12 l.S 1.2 0 64 27 6.0 .7 0 28 9.6 11 1.5 1.2 0 63 24 5.S .6 0 29 9.8 9.S 3.1 1.2 0 63 22 5.3 .5 0 30 9.S 9.S 14 1.4 0 66 21 5.3 .4 0 31 9.4 a 10 1.4 0 67 - 5.1 .4 Ho gage-height record; discharge computed on basis of unpublished record for Strawberry River near Soldier Springs. Honthly discharge, In second-feet, 1943-44 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

9 8 987 August September...... s.o 1.3 0 .27 sie The period ...... 1,021.0 22 ' 0 7.14 2,020 0 0 0 0 0 0 0 0 0 0 December...... 0 0 0 0 0 Calendar year ...... - - - - - 0 0 0 0 o 0 0 0 0 0 0 0 0 0 May...... 1,245.1 90 0 40.2 2,470 1,213 67 21 40.4 2,410 369.0 22 5.1 11. 9 732 74.6 5.1 .4 2.41 146 September...... 1.4 .3 0 .05 e.s Water year 1943-44 ...... 2,903.1 90 0 7.93 5,760 Time basis; Hountaln war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 201

Currant Creek near Frultland, Utah

Location.- Water-stage recorder, lat. 40°12', long. 110°54', In SEi sec. 21, T. 33., R. 9 W. Ulnta meridian, 200 feet dovmstream from Deep Creek, 250 feet downstream from bridge on U. S. Highway 40, and 3& miles southwest of Frultland. Drainage area.- 142 square miles. Records available.- January 1935 to September 1944. Extremes.- Maximum discharge during year, 504 second-feet May 15 (gage height, 3.94 feet); minimum dally, 23 second-feet Dec. 9, 11, 12, Jan. 29, 30. 1935-44: Maximum discharge, 1,040 second-feet July 26, 1941 (gage height, 5.85 feet), from rating curve extended above 425 second-feet; minimum recorded, 4 second- feet Mar. 12, 1941, but may have been less during periods of Ice effect. Remarks.- Records good except those for periods of Ice effect or no gage-height record, which are fair. Currant Creek feeder canal, constructed by Bureau of Reclamation In 1936, diverts from headwaters of Currant Creek to Strawberry Reservoir, from which It Is diverted through Strawberry tunnel to Great Basin for Irrigation In Strawberry Valley project.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept

1 25 29 28 26 25 30 36 76 208 81 34 25 2 25 28 25 26 25 29 41 76 226 84 34 26 3 25 28 25 26 25 29 4S 73 237 81 34 26 4 25 30 24 25 25 28 57 79 201 79 33 26 5 25 30 25 25 25 29 69 104 181 73 33 25 6 26 29 28 25 25 29 69 146 179 68 33 25 7 26 26 25 25 25 30 63 191 179 65 32 25 8 26 27 27 25 25 30 58 226 165 63 34 25 9 26 28 23 24 25 29 53 257 161 59 34 25 10 26 28 28 24 25 30 56 319 151 58 33 25 11 30 28 23 24 24 33 72 3D4 144 57 32 25 12 33 28 £3 24 24 32 70 332 136 54 31 2S 13 SO 28 24 24 24 30 63 359 139 53 30 25 14 28 28 24 24 24 30 57 359 129 51 30 24 15 28 v 2s 24 24 24 29 48 390 126 52 30 25 16 28 27 23 24 24 30 52 36S 118 50 30 25 17 28 27 23 25 24 31 46 330 115 49 30 25 18 30 28 23 25 25 31 46 264 113 48 31 26 19 41 28 24 25 26 31 43 235 104 47 31 28 20 32 28 25 2& 27 32 48 212 100 51 30 2S 21 33 28 25 25 27 30 47 217 96 48 30 27 22 33 29 25 26 27 30 43 235 93 46 30 26 23 31 30 24 26 27 30 45 250 90 44 29 26 24 31 28 24 26 27 30 51 252 87 46 29 86 25 31 29 25 26 28 30 54 234 87 43 29 27 26 32 27 25 25 28 30 52 210 121 40 28 27 27 32 24 85 25 28 30 56 210 105 38 27 26 28 33 28 25 24 28 32 59 201 94 39 26 26 29 35 24 26 23 *28 33 61 196 84 37 25 27 30 33 24 26 23 _ 33 70 212 86 36 25 29 31 31 - 26 24 - 35 212 34 25 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre- feet

October...... 918 41 Si 29.6 1,320 November...... 832 30 24 27.7 1,650 December ...... 770 28 S2 24.8 1,530 Calendar year 1943 ...... 20,801 358 r 57.0 41,260 January ...... 768 26 22 24.8 1,520 February ...... 744 28 25. 7 1,480 March...... 945 35 26 30.5 1,870 April...... 1,635 72 se 54.5 3,240 May...... 7,131 390 72 230 14,140 June ...... 4,055 237 & 135 8,040 July...... 1,674 84 3'. 54.0 3,320 August ...... 942 34 2E 30.4 1, 870 September...... 776 29 24 25.9 1,540 Water year 1943-44 ...... 21,190 390 22 57.9 42,020 * Winber discharge measurement made on this day. Hote.- Stage-diaeharge relation affected by ice Dec. 13 bo Jan. 3. No gage-height record Jan. 4 to Feb. 29; discharge computed on basis of 1 discharge measurement, weather records, records for Duehesne River near Tabiona, and records for other stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtracb 1 hour. 670650 O - 45 - 14 202 GREEN RIVER BASIN

Lake Fork above Moon Lake, near Mountain Home, Utah

Location.- Water-stage recorder, lat. 40°36', long. 110°31', In NWi sec. 1, T. 2 N., R. 6 w. Ulnta meridian, about 2,000 feet upstream from head of Moon Lake at maximum stage, 2 miles upstream from Brown Duck Creek, and 16 miles northeast of Mountain Home. Drainage area.- 78 square miles. Records available.- July 1942 to September 1944. April 1933 to September 1934 at site zli mu.es upstream (published as West Fork of Lake Fork above Moon Lake, near Mountain Home). Extremes.- 1942; Maximum discharge during period July to September, 223 second-feet July 16 (gage height, 1.60 feet); minimum daily, 46 second-feet Sept. 29, 30. 1942-43: Maximum discharge during year, 934 second-feet June 25 (gage height, 2.83 feet); minimum, not determined, occurred during period of no gage-height record. 1943-44: Maximum discharge during year, 2,700 second-feet June 26 (gage height, 4.27 feet), from rating curve extended above 700 second-feet; minimum, not determined, occurred during period of no gage-height record. 1933-34, 1942-44: Maximum discharge, that of June 26, 1944; minimum daily dis­ charge recorded, 13 second-feet Apr. 14, 1933. Remarks.- Records good except those for periods of Ice effect or no gage-height record, which are fair. Discharge, in second-feet, 1942-44 1942 Day July Aug. Sept. Day July Aug. Sept. Day July Aug. Sept. Day July Aug. Sept. foe1 1 72 51 9 59 46 17 174 79 a52 25 96 50 2 72 4S 10 59 49 18 16S 73 a52 26 99 68 50 5 73 48 11 75 67 19 150 70 53 27 96 59 a47 4 : 65 54 12 119 79 20 138 68 54 28 97 55 a47 5 6S 51 13 164 104 67 21 130 65 52 29 99 a54 a46 6 63 51 14 164 96 65 22 121 61 51 30 86 a53 46 7 63 4S 15 168 83 59 23 115 58 52 31 77 52 8 62 47 16 184 83 54 24 110 64 51 a No gage-height record; discharge computed on basis of records for stations on nearby streams.

Day Oct. Nov. Deo. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 45 45 38 35S 453 332 154 67 2 45 47 40 433 371 300 178 63 3 45 48 45 4S5 300 266 164 61 4 45 45 52 474 266 256 136 58 5 45 39 55 399 239 245 132 56 6 44 45 54 349 223 239 134 55 7 43 43 60 303 223 236 136 53 8 42 41 35 28 55 245 248 236 143 52 9 41 38 50 223 300 217 115 52 10 43 38 47 214 362 208 106 52 11 52 38 44 230 380 192 103 50 12 65 38 > 25 40 242 353 186 106 48 13 62 37 45 245 319 171 88 47 14 56 37 54 239 273 166 82 46 15 52 37 70 236 242 178 , 83 45 l:o 1 16 51 37 63 203 230 189 83 45 17 49 37 60 181 284 161 93 45 18 49 37 70 168 433 150 115 45 19 50 37 90 161 535 140 152 44 20 49 37 147 166 576 138 115 43 21 48 42 1 152 181 595 156 97 43 22 47 44 159 192 601 143 97 42 n*z 25 (CO 50 41 189 273 595 132 86 41 24 45 37 30 30 214 371 601 125 82 42 25 45 b36 33 200 453 658 119 79 44 26 45 b35 33 1S9 512 601 115 75 45 27 45 37 33 186 582 496 130 70 45 fcOOQ 46 36 35 194 684 413 117 68 45 29 42 35 _ 40 206 717 399 1E3 69 44 xn 46 35 _ 256 601 385 119 85 42 O\J 40 ~ - 31 44 " - 37 485 154 70 - b Stage-discharge relation affected by ice. Note.- No gage-height record Nov. 27 to Apr. 19; discharge :omputed on basis of weather records nd records for Whiterocks River near Whiterocks. GREEN RIVER BASIN 303

Discharge, in second-fee*-, of Lake Pork above Moon Lake near Mountain Home, Utah, 1942-44 -Continued 1943-44 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 41 35 46 727 810 114 52 2 41 37 45 538 831 107 51 3 40 41 40 421 754 102 50 4 40 38 40 360 663 100 50 5 39 39 50 382 603 95 50 6 39 37 70 451 533 94 49 7 39 D35 90 500 , 473 . 88 48 8 40 b37 95 401 416 87 47 9 39 b41 100 369 401 92 47 10 39 b39 110 347 364 86 46 IX 44 38 130 387 318 83 45 12 44 38 140 473 284 116 45 13 43 38 160 565 266 114 45 14 43 38 220 615 253 111 45 15 44 37 300 675 237 104 44 30 25 25 27 30 16 44 37 340 645 223 101 44 17 43 37 360 560 208 97 44 18 «41 37 290 591 201 95 47 19 46 36 280 852 206 92 48 20 44 36 23O 1,040 240 86 45 21 45 35 220 1,000 214 80 44 22 40 35 256 796 185 74 43 23 40 36 296 838 176 69 42 24 41 35 300 960 176 66 42 25 40 b34 328 1,110 162 65 42 26 41 b33 323 1,610 150 59 42 27 40 32 403 720 142 58 42 28 41 b34 535 688 138 55 42 41 b31 697 824 131 55 44 29 - 30 4036' 32 765 824 126 54 50 31 ~ - - 796 - 113 53 « Winter discharge measurement made on this day b Stage-discharge relation affected by ice. Iota.- Ho gage-height record Hov. 27, Hov. 30 to May 20; discharge computi:ed on basis 'of weather eodi-ds, and records for Moon Lake Reservoir, and stations on nearby stream;

Monthly discharge, in second-feet, 1942-44 Seccnd- Mean Runoff in Month f cot-days Maximum Minimum acre-feet _ _ - - _ _ - - - _ _ - - - _ _ - - - _ - - - May...... _ _ - - - 2,446 184 77 129 4,850 2,196 119 52 70.8 4,360 September ...... 1,587 79 46 52.9 3,150 The period ...... _ - _ 12.36O 1,476 65 41 47.6 2,930 1,179 48 35 39.3 December...... 1,005 - - 32,4 Calendar year ...... - - - - - 868 _ 28 1,720 745 _ _ 26.6 1,480 856 40 .. 27.6 1,700 3,124 256 38 104 6,200 May...... 10,605 717 161 342 21,030 11,954 658 223 398 23,710 5,639 332 117 182 11,180 3,296 178 68 106 6,540 September ...... 1,460 67 41 2,900 Water year 1942-43 ...... 42,207 717 _ 116 83,720 1,278 46 36 41.S 2,530 1,088 41 31 ' 36.3 2,150 December...... 930 30 1,840 Calendar year 1943 ...... 41,843 717 _ 115 82,990 25 1,540 _ _ 25 1,440 837 _ _ 27 1,66O 900 _ _ 30 1,790 Bay...... 8,044 796 40 259 15,960 20,249 1,610 347 675 40,160 10,003 831 U9 323 19,840 2,652 116 53 85.5 5,260 September...... 1,375 52 42 45.8 2,730 Water year 1943-44 ...... 48,856 1,610 - 133 96,910 Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 204 GREEN RIVER BASIN

Moon Lake Reservoir near Mountain Home, Utah

Location.- Mercury Indicating gage, lat. 40°33 140", long. 110°29'30", In NEi sec. 19, T. y N., R. 5 W. Ulnta meridian, at dam. It miles downstream from Brown Duck Creek, H miles upstream from Yellowstone Creek, and 12t miles northwest of Mountain Home. Datum of gage is at mean sea level (levels by Bureau of Reclamation). Drainage area.- 108 square miles. Records available.- December 1937 to September 1944. Extremes.- Maximum contents observed during year, 36,070 acre-feet June 25 (elevation, 8,137.35 feet); minimum observed, 5,620 acre-feet Sept. 30 (elevation, 8,088.00 feet). 1938-44: Maximum contents observed, that of June 25, 1944; minimum observed, 356 acre-feet Sept. 6, 1939 (elevation, 8,073.25 feet). Remarks.- Reservoir Is formed by an earth-fill, rock-faced dam with concrete core; storage began Dec. 9, 1937. Capacity, 35,800 acre-feet between elevations 8,072.00 feet (crest of original outlet of lake 2,000 feet upstream from dam) and 8,137.00 feet (top of spillway gates). Elevation of spillway crest Is 8.121.00 feet and elevation of sill of outlet works Is 8,064.16 feet. Dead storage between sill of outlet and crest of original outlet of lake Is 2,050 acre-feet. Dead storage below sill of outlet, 11,690 acre-feet. Total dead storage, 13,740 acre-feet. Figures given herein repre­ sent usable contents. Water Is used for Irrigation on lands under Moon lake Water Users' Association and Ulntah Indian Irrigation projects. Gage usually read between 7 and 10 a.m. Cooperation.- Gage-height record furnished by Moon Lake Water Users' Association. J .

Contents, In aero-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. , Sept.

1 10,510 7,220 a9,700 all, 300 al3,600 a!5,000 al6,SOO alS,800 28,760 35,950 26,320 11,930 Z 10,280 9,760 _ « 89,340 35,950 27,540 11.400 3 9,960 - _ 13,630 _ _ 16,940 30,020 35,950 86,980 11,140 4 9,740 « _ _ _ _ 19,000 30,530 ~ 26,280 10,850 5 9,430 - - - - - 18,940 30,640 - 25,550 10,510 6 9,200 _ _ _ _ _ 16,840 30,790. _ 24,900 10,800 7 m. _ _ _ _ « 16,780 31,200 - 24,190 9,880 fl 8,440 - _ _ _ 17,230 16,690 31,530 - 23,480 9,480 9 8,320 « _ _ _ 17,260 IS, 690 31,710 - 22,880 9,230 10 8,050 - - - - 17,320 18,720 31,750 - 22,060 6,830 11 7,810 _ _ _ _ 17,380 18,780 31,790 _ 21,510 8,240 12 7,640 _ _ _ _ 17,470 18,970 32,010 - 20,890 6,080 13 7,420 _ _ _ _ 17,530 19,120 32,420 ~ 20,380 7,830 14 7,260 _ _ _ _ 17,590 19,370 33,020 w 19,870 7,680 15 7,090 - 13,100 14,390 15,920 17,680 19,870 33,590 35,950 19,370 7,590 16 7,000 _ _ _ _ _ 20,600 34,270 35,800 16,880 7,360 17 6,930 _ _ _ _ _ 21,540 34,760 35,650 16,380 7,880 18 6,840 _ _ _ _ _ 22,190 35,110 35,340 17,920 7,140 19 6,760 . _ _ _ .. 22,680 35,800 34,950 17,470 7,000 20 6,780 . - - - - - 23,050 35,800 34,610 16,990 6,860 21 _ _ _ _ _ 16,080 23,220 _ 34,350 16,540 6, TEC 22 _ - _ _ _ 16,140 23,180 - 34,190 16,070 6,580 23 _ _ _ _ _ 18,200 23,120 - 33,620 '15,600 6,440 24 _ _ _ _ 18,230 23,080 35,950 33,180 15,200 6,300 25 - - - - - 13,350 23,120 36,070 32,680 14,710 6,210 26 _ _ _ _ _ 16,380 83,120 _ 32,200 14,360 6,070 27 - _ _ _ _ 16,470 23,320 - 31,680 13,970 5,940 28 _ _ _ 14,990 _ 16,540 23,680 35,950 31,010 13,550 5,820 29 _ _ _ _ _ 18,630 24,420 35,950 30,480 13,410 5,710 30 _ « _ _ _ 16,720 25,440 35,950 29,730 18,720 5,620 31 - - 11,270 - - 16,720 - 26,900 - 29,040 18,340 - Monthly elevation and contents, water year 1943-44' Change In contents Elevation Contents Date during month (feet) (acre-feet) (acre- feet)

Q nol AA Dec. 1...... 89,700 +1,600 Calendar year 1943. . - -4,800

May 1......

Aug. 1...... U o*cn Oct. 1...... 8,087.80 5,530 Mater year 1943-44. - - -4,980 1 nterools-t ed. GREEN RIVER BASIN 205 Lake Fork below Moon Lake, near Mountain Home, Utah

Location.- Water-stage recorder, lat. 40033 I 30", long. 110°29'30", In E| sec. 19, T. a N., R. 5 W. Ulnta ^pridian, 2,000 feet downstream from Moon Lake Dam, 2 miles downstream from Brown Duck Creek, and 12 miles northwest of Mountain Home. Drainage area.- 110 square miles. Records available.- April 1942 to September 1944. September 1921 to September 1934 irragmentaryj at dam alte 2,000 feet upstream, published as west Fork of Lake Fork near Mountain Home. Extremes.- Maximum discharge during year, 2,070 second-feet (regulated) June 26 (Rage neignt, 5.46 feet), from rating curve extended above 1,130 second-feet; no flow Nov. 2 to May 3 (gates closed). , 1921-34; 1942-44: Maximum discharge recorded, that of June 26, 1944; no flow at times w,hen i^servolr gates are closed. Remarks.- Records good except those for Oct. 21 to Nov. 1, which are fair. Flow regu- latea by Moon Lake Reservoir (see preceding page). No diversion above station.

Discharge, in aecond-feet, water year October 1943 to September 3.944 Das Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 198 a!4 0 341 884 496 318 2 196 0 0 237 854 490 887 3 196 0 0 241 764 490 254 4 196 0 49 365 710 486 SS4 5 193 0 133 436 614 485 260 6 193 0 133 435 560 480 860 7 193 0 133 440 686 475 850 8 193 0 133 440 430 476 153 9 193 0 133 440 375 470 270 10 190 0 133 440 450 400 see 11 160 0 136 440 390 460 866 12 149 0 136 445 386 450*455 169 13 149 0 136 446 295 ' 130 14 128 0 136 470 874 445 108 IS 106 0 ^ 101 500 274 430 114 16 93 0 48 600 318 416 188 17 91 0 82 606 360 410 188 18 91 0 165 606 486 380 180 19 67 0 165 784 410 400 182 20 52 0 201 965 400 386 188 21 858 0 268 1,080 395 376 ISO 22 a52 0 403 898 415 390 114 23 a58 0 403 914 430 360 107 24 a52 0 403 893 436 , 336 107 25 a36 0 403 1,030 446 331 107 26 a24 0 403 1,350 455 331 107 27 a24 0 403 830 480 326 107 28 a24 0 409 686 485. 326 107 29 a24 0 409 884 490 328 107 30 aS4 0 297 S78 490 322 104 31 a24 - 837 - 496 318 - Second- Runoff in Month foot-days Maximum Minimum Mean ao re-feet 3,415 19S 84 110 6,770 14 14 C .47 88 December...... 0 0 C 0 0 Calendar year 1943 ...... 51,807 533 C 142, 102,800 January C 0 February March...... 0 0 C 0 0 0 C 0 May...... 6,806 409 C 200 18,310 June 18,653 1,350 S31 628 37,000 July...... 14,583 854 274 470 28,980 Augu 18,718 495 31E 410 25,210 September...... 5,028 318 10£ 168 9,970 Water year 1943-44 ...... 60,610 1,350 C 166 120, EDO a No gage-height record; discharge computed en basin of record of gate openings at Moon lake Dam. Time baslsi Mountain war tine. To convert war tine tc standard time, subtract 1 hour 206 GREEN RIVER BASIN

Lake Fork near Upalco, Utah

Location.- Water-stage recorder, lat. 40°15'30", long. 110°13'00", In NEiNEi sec. 4, T. 3 s., R. 3 w. Ulnta meridian, a quarter of a mile upstream from bridge on u. S. high­ way 86, 1* miles south of Upalco, 9 miles northwest of Myton, and 10 miles upstream from mouth. Drainage area.- 418 square miles. Records available.- October 1942 to September 1944. Extremes.- 1942-43: Maximum discharge during period October to September, 548 second- reet June 27 (gage height, 3.43 feet); minimum dally, 0.1 second-foot Apr. 16, May 22. 1943-44: Maximum discharge during year, 4,520 second-feet Jwie 26 (gage height, 6.05 feet), from rating curve extended above 1,400 second-feet; minimum less than 0.2 second-foot, occurred during period of no gage-height record. Remarks.- Records good except those for periods of ice effect or doubtful or no gage- neignt record, which are poor. Many diversions above and.below station for Irrigation. Flow partly regulated by Moon Lake Reservoir.

Discharge, In second-feet, 1942-44 1942-4*3 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. i _ 2.6 *88 95 80 79 51 1.1 7.8 4.0 O.S 3.0 2 - 1.3 97 90 80 68 34 67 142 1.9 4.0 3.0 3 - 1.4 74 80 SO 74 4.S 108 8.2 l.S 9.0 .8 4 - 1.3 70 70 75 83 .S 154 S.I 2.2 1.8 .2 5 - 1.3 65 80 75 72 a5 108 2S 2.0 1.0 6 _ 1.5 60 85 SO 66 alO 22 d.2 1.7 9.5 7 - 3.4 75 SO 30 93 a!5 d.2 .4 2.0 13 8 - 8.1 90 75 85 101 a20 6.6 d.2 6.9 11 9 - 7.5 105 80 75 16S aSO d.2 d.S 3.2 1.7 10 - 6.3 115 90 75 108 a40 d.2 4.4 1.4 2.0 11 _ 20 110 95 75 90 a50 .8 3.6 2.4 3.6 12 - 37 102 90 75 74 61 1.0 29 3.0 35 13 21 57 99 95 75 95 72 6.0 5.6 5.4 16 14 16 54 95 95 75 97 32 11 47 4.2 6.9 15 6.9 40 91 90 75 7S 6.9 64 1.5 S.8 7.2 16 S.O 35 95 70 70 52 .1 d.2 1.1 34 14 17 1.0 42 93 50 75 61 16 .4 2.0 4.4 2.2 > a. 2 18 1.0 46 83 *30 85 60 18 1.0 16 .8 2.0 19 .9 51 90 40 95 47 5.S d.2 48 .6 49 20 .9 56 84 60 95 51 1.6 d.2 93 .8 7.5 21 1.0 58 SO 90 100 SS 3.6 d.2 68 1.7 .2 22 .9 61 75 110 105 57 .9 .1 14 2.6 .4 23 .8 78 90 100 106 39 .8 2.0 4.6 1.1 d.2 24 .8 79 90 95 104 51 6.9 54 4.O 1.2 d.2 25 .8 84 85 90 90 62 2.4 S6 17 .S d.2 26 .8 7S 75 80 83 64 .9 6.0 12 1.7 d.2 27 .8 106 65 90 78 58 d.2 14 332 .8 d.2 28 .8 99 85 100 79 66 d.2 26 174 .7 d.2 29 .8 81 100 95 _ 76 d.2 76 9.0 1.6 12 30 .8 93 90 90 _ 56 d.2 86 133 3.2 a6a4 ' 31 1.0 - 95 90 - 42 - 32 - .4 - * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of field estimate of discharge ort Sept. 17, engineer's notes, and records for stations on nearby streams. d Doubtful gage-height record; discharge stlmated. Mote.- Stage-discharge relation affected by Ice Dec. 4-11, Dec. 21 to Feb. 28 (no gage-height record Jan. 13-17, Feb. 13-22); discharge computed on basics of weather records and records for Duchesne River at Duohesne. GREEN RIVER BASIN 807

Discharge, in second-feet, of lake Pork near Bpaleo, Utah, 1942-44 Continued 1943-44 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 99 b96 164 68 325 1,290 60 29 2 97 bes 166 67 265 1,370 45 43 3 97 wo 181 62 214 1,310 61 86 4 99 b88 217 62 118 1,060 44 14 5 104 b86 211 53 168 921 40 16 6 108 b82 166 52 205 727 39 11 7 99 b80 101 60 380 616 40 11 S 97 b78 84 79 348 452 36 10 9 1 ftcOA OK 93 bB2 101 114 282 318 a35 8.8 10 93 84 102 99 228 256 a35 30 11 104 90 86 52 237 239 34 36 12 106 112 72 22 288 176 34 27 13 108 110 78 9.5 430 116 40 2926' 14 106 110 57 20 530 62 43 15 aO.2 99 b90 t>90 108 47 83 676 31 41 19 16 93 99 66 83 748 28 40 27 17 86 108 73 108 626 23 36 33 18 52 114 83 19 590 61 36 40 19 53 110 84 12 792 67 39 40 20 67 108 84 3.0 1,620 88 45 30 21 60 95 95 1.4 1,690 129 38 25 22 70 91 70 32 1,200 68 33 29 23 90 104 60 58 1,100 66 38 24 24 91 b96 112 66 29 1,140 80 26 23 25 86 96 64 32 1,430 76 32 21 26 ' 81 91 47 26 2,670 56 29 20 27 78 86 62 32 1,600 47 28 17 28 81 81 61 62 1,020 63 28 17 29 88 97 81 203 1,280 53 26 16 30 93 _ 129 68 313 1,350 ' 65 31 21 31 - (») - 149 310 - 53 33 - * Winter discharge measurement made on this day. a Ho gage height record] discharge computed on basis of field estimate of discharge on Oct. 16 an records for stations on nearby streams. b Stage-discharge relation affected by Ice (no gage-height record Dee. 24-30, Jan. 2 to Mar. 8; discharge conputed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams.

Monthly discharge, in second-feet, 1942-44 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet 59.0 21 117 2,560 December...... 2,716 116 60 87.6 5,390 Calendar year ...... - - - - - January 1943 2,570 110 30 5,100 February. . 2,325 106 70 83.0 4,610 March...... 2,240 168 39 72.3 4,440 490.3 72 .1 16.3 972 May...... 874.4 164 .1 28.2 1,730 1,208.9 332 .2 40.3 2,400 101.3 34 .4 3.27 201 221.0 49 .2 7.13 438 September...... 12.2 .41 24 The period...... - - - - 27,980 October 1943 ...... 2 *7 Of} December...... 3,018 - 97.4 5,990 Calendar year 1943 ...... 14,470.3 332 .1 39.6 28,700 2,790 February ..... 2,610 _ _ 90- 5,180 3,058 149 78 6,070 April 2,857 217 47 95.2 6,670 Hftv 2,215.9 313 1.4 4,400 23,353 2,670 118 46,320 9,934 1,370 23 320 19,700 1,143 61 25 36.9 2,270 September...... 716.8 43 8.8 23.9 1,420 Water year 1943-44 ...... 83,104.9 2,670 - 145 105,300 Mountain war time. To convert war time to standard time, subtract 1- hour. 208 (BEEN RIVER BASIN Yellowstone Creek near Mountain Home, Utah ion.- Water-stage recorder, lat. 40°27', long. 110°22', In SEi sec. 29, T. IN., R. wTunlta meridian, at bridge a third of a mile upstream from mouth, 3i miles north­ east of Mountain Home, and 7* miles northeast of Altonah. Inage area.- 143 square miles. cords available.- April 1943 to September 1944 (discontinued). .- 1943:Haxlmum discharge during period April to September, 660 second-feet (gage height, 2.40 feetj minimum dally, 20 second-feet Sept. 18, 23, 24. 1943-44: Maximum discharge during water year, 2,130 second-feet June 26 (gage height, 3.92 feet); minimum dally, 17 second-feet Oct. 13. Remarks.- Records good except those for periods of Ice effect or no gage-height record, which are fair. Diversions for Irrigation above station. Discharge, In second-feet., 1943-44 1943 Day Apr. Kay Jane July Aug. Sept. Day Apr. Kay June July Aug. Sept. 1 - 180 328 198 30 73 16 126 212 88 43 25 2-269 276 164 51 68 17 107 239 71 40 21 3 - 310 227 160 68 66 18 97 328 68 71 20 ' 4 - 346 239 170 39 62 19 90 400 50 ISO 21 5 - 284 201 163 39 56 20 86 443 40 138 21 6 - 247 194 148 77 64 21 93 405 60 121 21 7 - 231 191 151 71 54 22 97 405 41 121 21 S - 157 198 174 70 52 23 163 395 31 107 20 9 - 126 243 129 62 43 24 - 269 395 32 110 20 10-121 880 107 66 39 25 319 471 88 12i 21 11-129 310 93 50 38 26 351 410 28 107 23 12 - 138 292 77 58 34 27 36 400 337 30 100 24 13 - 141 280 73 45 34 88 37 448 271 30. 88 23 14 - 148 251 66 40 32 29 44 513 243 58 77 22 15 - 164 236 64 40 31 30 75 410 247 39 93 21 31 366 33 n - 1943-44 Day Oct. JOY. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 23 62 73 54 50 47 46 76 682 916 £6 56 2 23 60 70 62 49 46 46 76 551 989 53 63 3 23 60 73 62 47 46 50 70 486 862 51 63 4 24 67 76 50 46 46 67 68 361 760 49 63 5 26 67 76 60 46 46 64 SI 365 634 49 51 6 26 64 66 52 47 46 66 107 416 550 47 60 7 29 66 66 52 48 44 64 $29 607 476 46 49 8 32 64 68 50 48 44 60 161 448 423 46 49 9 24 68 62 52 48 «46 67 170 438 410 49 48 10 18 70 56 50 48 46 67 198 395 379 49 46 11 19 71 62 52 46 60 68 209 443 354 48 48 12 38 71 60 52 46 64 60 224 525 300 46 52 13 17 71 60 52 46 54 60 243 668 263 46 63 14 22 70 64 62 46 SO 66 292 728 241 46 60 15 29 68 66 60 46 52 60 346 783 221 46 50 18 28 68 62 50 44 50 56 385 871 219 46 60 17 28 68 62 60 46 62 52 376 761 208 45 50 18 27 70 66 SO 44 50 62 280 743 203 44 66 19 43 73 66 50 46 48 50 880 954 193 46 63 20 32 73 62 50 47 48 56 243 1,050 233 44 68 21 58 70 60 49 48 46 64 216 972 273 43 51 22 34 79 60 49 47 46 52 235 769 198 43 46 23 32 76 68 50 47 46 *51 263 720 167 42 48 24 33 73 58 52 46 44 56 271 S71 188 46 48 25 34 73 66 64 46 44 64 897 831 147 63 48 26 1 34 68 54 66 48 46 52 276 gl,320 109 49 48 27 58 73 54 56 50 46 64 323 g825 95 49 48 28 44 77 52 66 52 44 66 405 g729 84 63 48 29 52 70 54 52 48 45 70 568 810 83 54 53 30 46 73 56 50 44 76 682 885 83 68 62 31 *? - 56 J>2 - 46 - 728 - 76 S1 - e Winter discharge measurement aaae on this day. g Computed from graph.based on gage readings. Hote.- Stage-discharge relation affected by Ice Dee. 10 to Kar. 3, Mar. 5-9, 25-29 (no gage-height record 'Dec. 22 to Kar. 3, Mar. 6-8; discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams. o gage-height record Sept. 10-30$ discharge computed on basis of discharge measurement made on Sept. 23. diversion records, and records for stations on nearby streams. Monthly discharge, in second-feet, 1948-44 Second- tfflyflnflTjfl Mean Runoff in Month foot -days Minimum acre-feet 513 S6 222 13,660 8,946 471 191 298 17,740 198 28 S4.3 5,180 180 20'30 76.8 4,720 September...... 1,060 73 35.3 2,«)Q - - - - 43,400 October 1943 ...... ^...... 937 62 17 30.2 1,360 November 2,032 79 52 67.7 4,030 1,942 76 6I 62.6 3,860 January 1944 66 49 51.5 3,170 February ...... 62 44 46.9 8,700 March...... 44 47.3 2,910 76 46 67.0 5,390 728 16,370 1,320 361 694 41,290 989 76 333 20,480 65 42 48.5 2,980 September...... 1.536 63 46 51.2 3,060 Water year 1943-44...... 63,479 1,320 17 146 106,100 Time basi«; Mountain war time. To convert war time to standard tine, subtract 1 hour. GRiEN RIVER BASIN 209

Ulnta River near Keola, Utah

Location.- Water-stage recorder, lat. 40°32 I 10", long. 110003'40", in SEiSWi sec. 25, T. 2~HT7~R. 2 W. Ulnta meridian. 800 feet downstream from bridge, three-quarters of a mile upstream from Pole Creek, and 7 miles north of Neola. Drainage area.- 181 square miles. Records available.- July 1921 to September 1927 (fragmentary), September 1929 to September 1944. Average discharge.- 16 years (1925-26, 1929-44), 174 second-feet. Extremes.- Maximum discharge during year, 3,320 second-feet June 26 (gage height, 5.20 reet;, from rating curve extended above 1,600 second-feet; minimum dally, 50 second- feet Mar. 7. 1929-44: Maximum discharge, that of June 26, 1944; minimum recorded, 32 second- feet Mar. 10, 1941, but may have been less during period of Ice effect. Remarks.- Records good except those for periods of Ice effect, which are fair, water aiverted from Pole Creek and used at Ulnta Power & Light Co.'s power plant enters river 500 feet above station. Summer flow slightly regulated by several small mountain lakes and reservoirs.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 139 101 62 60 62 58 61 S6 1,180 1,300 340 218 2 135 108 78 60 60 57 60 85 94 S 1,460 329 210 3 133 110 78 58 5S 58 6S 76 768 1,300 321 202 4 130 112 78 56 56 55 73 76 675 1,190 304 197 S 12S 110 78 58 56 53 76 93 710 1,060 297 190 6 126 97 79 60 56 52 79 12S 868 964 - 284 171 7 124 93 74 58 58 60 82 155 972 877 281 163 8 124 102 78 56 56 54 76 167 805 794 275 156 9 12.4 108 78 58 56 59 76 182 776 787 311 142 10 124 101 93 56 56 59 74 212 738 761 311 132 11 12S 99 76 58 56 61 75 226 860 690 297 126 12 130 97 73 60 54 61 SO 256 868 640 294 130 13 124 97 72 60 56 61 SO 289 964 593 297 148 14 126 93 76 60 56 61 72 356 1,040 581 290 144 15 122 90 78 58 54 56 65 476 1,150 552 281 136 16 122 88 73 68 52 56 72 587 1,180 541 275 136 17 116 «SS 73 6S 54 59 68 649 1,030 519 265 134 18 112 88 82 56 52 60 70 530 1,000 514 268 142 19 156 86 78 56 54 66 66 525 1,270 497 265 150 20 126 85 73 56 56 69 70 448 1,490 681 253 134 21 133 84 72 66 58 56 70 416 1,460 587 246 117 22 124 92 72 56 57 56 66 444 1,380 506 242 112 23 116 93 68 58 57 66 66 603 1,330 487 231 104 24 118 86 68 64 54 57 72 552 1,450 552 225 97 25 116 85 66 68 57 56 72 623 1,550 487 228 96 26 116 SO 64 70 60 67 70 569 2,370 438 215 94 27 116 78 62 70 61 57 72 662 1,330 410 207 92 28 122 85 60 69 64 56 76 836 1,150 393 202 90 29 126 76 62 66 60 57 80 1,100 1,260 380 190 90 30 118 78 64 60 - 59 88 1,220 1,380 367 228 104 31 110 ~ -64 64 - 63 - 1,270 361 225 Seccnd- Runoff in Month fcct-days Maximum Minimum Mean acre-feet

October...... 3,663 155 lie> 126 7,660 November...... 2,790 112 If. 93.0 5,630 December...... 2,271 93 6C 73.3 4,500 Calendar year 1943 ...... 63,817 745 5C 173 126,400 January...... 1,863 70 56 1 60.1 3,700 February...... 1,654 64 5J 57.0 S * oontSOU March...... 1,780 63 6C 57.4 3,530 April...... %f 184 88 6C 446° 4,330 Bay...... 13,801 1,270 76 27,370 June ...... 33,961 2,370 67E 1,132 67,340 July...... 21,161 1,460 35. 683 41,970 August ...... 8,276 340 190 267 16,420 September...... 4,161 218 90 139 8,260 Water year 1943-44 ...... 97,755 2,370 60 267 193,900 * Winter discharge measurement made on this day. Bete..- Stage-discharge relation affected by ice Dec. 26 to Jan. 27, Jan. 29 to Feb. 7, Feb. 11-20, Mar. 6-8, 2s. Mountain war tine. To convert war tine to standard time, subtract 1 hour. 210 GREEN RIVER BASIN

Uinta River at Fort Duchesne, Utah

Location.- Water-stage recorder, lat. 40°18', long. 109 051', in NWi sec. 23, T. 2 S., R. 1 E. Uinta meridian, a quarter or a mile downstream from bridge on U. S. Highway 40, half a mile north of Fort Duchesne, and 7 miles east of Roosevelt. Drainage area.- 672 square miles. Records available.- October 1942 to September 1944. September 1899 to December 1904, April to June 1906, April 1907 to November 1910 (fragmentary) at site half a mile down­ stream. May 1917 to September 1920 (fragmentary) at site below small diversion 2 miles downstream (published as Uinta River near Fort Duchesne). Records of monthly discharge prior to October 1938 have been republlshed, with some revisions and additions, in Water-Supply Paper 918. Extremes.- 1942-43: Maximum discharge during water year, 379 second-feet May 4 (gage height, 2.42 feet); minimum dally, 0.9 second-feet July 15. 1943-44: Maximum discharge during water year, 3,540 second-feet June 27 (gage height, 4.34 feet), from rating curve extended above 1,700 second-feet; minimum dally, 3.8 second-feet Oct. 16. 1899-1904, 1906-10, 1917-20, 1942-44: Maximum discharge, more than 7,500 second- feet In June 1917; no flow at times. Remarks.- Records good except those for periods of Ice effect or no gage-height record, wnicn are poor. Many diversions above station for irrigation.

Discharge, in second-feet, 1942-44 1942-43 Day Oct. Nov. Dec. Jan. .Feb. Mar. Apr. Hay June July Aug. Sept.

1 a20 2S 45 86 a5 63 84 24 5.4 20 2 a20 28 63 64 a5 165 277 14 9.0 19 3 -aSO 26 60 4S a5 266 143 14 19 15 4 a 20 26 58 72 a5 305 5S 15 16 14 5 a 20 26 63 a5 a200 126 17 12 13 > b60 e a20 26 1 "> 49 as alOO 44 12 16 14 7 aSO 27 > b50 54 alO a75 30 9.5 17 10 8 a 20 28 b70 64 a!2 aSO 23 8.2 2S 7.0 9 aSO 29 6S a!5 a40 16 7.S 19 5.8 JLO a22 27 55 a20 a30 10 7.0 18 6.6 11 a25 25 5S 28 a25 9.5 7.0 18 7.0 12 a30 26 52 84 a 20 8.6 3.2 16 5.4 13 a 28 28 49 13 a20 7.4 2.5 12 5.8 14 25 33 52 7.8 a20 10 1.2 12 5.8 15 23 36 52 2.7 IS 19 .9 12 5.8 16 23 43 b75 37 2.0 16 32 15 12 4.S 17 23 48 (») b80 44 a2 19 32 20 12 4.4 18 21 45 b90 49 al IS 27 13 18 4.4 19 23 43 blQO 41 al 19 24 9.5 45 4.4 20 24 42 b60 b70 bllO 33 al 22 21 9.5 34 4.8 21 24 42 b!20 33 al IS 21 3.2 28 6.2 22 26 43 b!30 38 a2 13 18 2.6 21 a6 23 24 52 132 31 a3 10 18 4.0 24 a5 24 25 54 121 33 a5 15 13 4.2 24 a5 25 26 52 104 39 7.0 20 IS 2.S 19 a5 26 25 45 96 33 2.S 17 ^4 3.4 17 a6 27 26 52 92 29 a2 15 21 5.0 16 a6 28 26 74 90 13 a2 IS 14 9.5 15 a6 29 28 55 19 a5 70 11 10 20 a6 30 27 5S _ alO 8.2 104 19 8.6 27 a6 31 27 - - a5 - 68 - 6.6 22 - » Winter diecharge measurement made on this day. a No gage-height record; discharge computed on basia of records for stations on nearby streams, b Stage-discharge relation affected by ice (no gage-height record Jan. 4-16, Feb. 14-22; discharge computed on basis of weather records-and records for stations on nearby streams. GREEN RIVER BASIN 211

Discharge, In second-feet, of TTinta River at Port Duchesne, Utah, 1942-44 Continued 1943-44 Day Oct. Nov. oec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6 11 43 9C 143 1,580 1,540 19 8.7 2 6 11 43 90 113 1,280 1,680 18 7.5 3 6 39 96 101 990 1,420 15 8.1 4 6 37 ( ) 100 82 645 1,200 17 8.7 5 6 43 110 82 645 1,040 15 8.1 6 e 49 120 92 838 878 17 7.5 7 e 48 130 129 1,330 720 16 6.2 8 e b60 ISO 152 1,130 555 12 6.0 9 e 20 58 110 174 1,020 36.7 10 6.6 10 5 64 100 174 976 308 9.9 4.4 11 4 b68 110 177 1,240 181 7.6 4.4 12 4 71 120 180 1,240 135 7.5 4.4 13 4 69 120 187 1,240 105 9.9 4.4 14 4 68 110 218 1,620 77 9.9 4.4 15 4 71 100 293 1,640 68 10 4.4 b70 b80 b90 16 3.8 *30 75 120 356 1,500 46 10 4.8 17 4.0 SI 69 »110 480 1,280 40 9.3 5.2 18 4.4 33 71 111 369 948 35 11 6.6 19 15 33 116 360 1,200 28 14 9.3 20 18 33 106 285 1,600 32 15 10 21 6.8 33 116 215 1,680 43 13 9.3 22 4.6 40 96 218 1,480 46 12 8.1 23 4.6 52 90 236 1,200 32 11 7.0 24 4.4 41 88 297 1,190 28 11 5.2 25 4.8 40 WO 90 400 1,330 36 11 5.7 26 5.8 39 96 369 1,950 36 11 6.2 27 7.4 34 90 394 2,500 30 8.7 5.7 28 9.5 34 113 645 1,420 26 9.9 5.7 29 12 33 126 1,040 1,410 23 8.7 6.S 30 10 35 _ 184 1,620 1,440 20 8.1 6.2 51 10 (») - - 1,800 - 19 8.7 - * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice (no gage-height record Dee. 20-31, Jan. 5 to Mar. 4, 5?r- Z75} ; diseharS8 oojnputed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams). Note..- Ho gage-height record Oct. 1-18, Nov. 3-15, Apr. l-17j discharge computed on basis of dis­ charge measurements made on Oct. 15, Apr. 17, and records for stations on nearby streams.

Monthly discharge, in second-feet, 1942-44 Seoond- Runoff in Month foot-days Maximum Minimum Mean ao re-feet 731 30 20 23.6 1,450 1,161 74 26 38.7 2,300 December...... 1,796 57.9 3,560 Calendar year ...... - - - - - 2,070 _ _ 66.8 4,110 2,390 132 _ 85.4 4,740 March...... 1,373 86 5 44.3 2,720 210.5 28 1 7.02 418 May...... 1,859 305 10 60.0 3,690 1,176.5 277 7.4 39.2 2,330 July 270.2 2* ' .9 8.72 536 583.4 45 5.4 18.8 1,160 September...... 834.2 20 4.4 7.81 465 Water year 1942-43 ...... 13,853.8 305 .9 38.0 27,480

199 1 18 3 a 633 December...... 1,947 37 62.8 J 3,860 Calendar year 1943 ...... 13,134.9 306 .9 36.0 26,060 4 300 80 April ...... 88 May......

11 8 September...... 195.6 10 4.4 6.52 388 Water year 1943-44 ...... 75,356.8 2,500 3.8 206 149,400 Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 212 GREEN RIVER BASIN

Whlterocks River near Whiterocks, Utah

Location.- Water-stage recorder, lat. 40°34', long. 109°56', in SWi sec. 18, T. 2 N., R. 1 E. Uinta meridian, 25 feet downstream from abandoned bridge, three-quarters of a mile upstream from heading of United States Whiterocks Canal, and 6$ miles north of Whiterocks. Drainage area.- 115 square mile's. Records available.- August 1921 to September 1928, February 1930 to September 1944. septemoer may to August 1904, April 1907 to November 1910 near present site. November 1917 to June 1921 at site downstream from diversion of United States White- rocks Canal and above that of Farm Creek Canal (records equivalent if flow of White- rocks Canal is included). Average discharge.- 20 years (1899-1903, 1908-10, 1930-44), 123 second-feet. Extremes.- Maximum discharge during year,2,100 second-feet June 26 (gage height, 4.95 reet), from rating curve extended above 800 second-feet; minimum daily, 23 second- feet Mar. 7. 1921-28, 1930-44: Maximum discharge, 2,750 second-feet June 21, 1922, from rating curve extended above 1,700 second-feet; minimum recorded, 10 second-feet Dec. 5, 1933, but may have been less during periods of i3e effect. Remarks.- Records good except those for periods of ice effect or no gage-height record, wnicn are fair. Flow slightly regulated by small mountain lakes.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 53 44 37 35 36 27 29 47 1,040 736 175 92 2 52 52 36 36 33 27 30 47 896 749 177 88 3 52 53 36 *35 31 27 33 42 718 697 164 85 4 51 55 36 35 29 27 38 42 599 629 164 62 5 51 51 36 35 28 »24 41 52 653 567 154 78 6 50 44 36 37 28 24 41 76 846 509 145 74 7 50 47 35 36 29 23 41 96 977 448 141 70 B 50 56 36 36 28 25 38 102 740 404 139 68 9 50 51 35 35 88 27 38 117 713 376 145 66 10 50 46 37 34 28 28 38 134 725 354 147 64 11 55 44 36 36 26 28 41 153 804 326 143 62 12 56 43 35 37 27 28 42 176 74B 303 139 62 13 53 43 36 37 27 28 41 211 837 278 137 60 14 55 43 37 36 28 28 35 290 905 256 137 60 15 52 42 38 35 28 29 38 361 941 245 136 58 16 50 40 37 35 27 28 35 462 932 235 132 58 17 47 »41 36 34- 28 29 *34 495 780 230 125 56 IB 45 42 38 34 27 29 34 420 740 227 123 60 19 73 41 41 34 29 28 34 420 896 227 120 65 20 63 41 40 34 30 28 35 336 1,020 303 95 62 21 63 39 39 34 31 26 35 323 959 296 94 56 22 60 44 39 33 31 27 34 372 796 253 130 56 23 53 46 38 34 29 27 35 441 748 237 132 56 24 53 45 38 38 28 27 37 513 764 281 132 55 25 55 43 39/ 41 28 27 38 536 756 253 134 54 26 53 41 39 41 28 28 37 462 1,350 213 132 54 27 53 39 37 41 30 28 39 530 806 192 134 53 28 56 41 35 40 £9 27 43 764 756 177 143 53 29 61 38 36 36 27 28 44 888 749 168 115 53 30 55 36 36 35 _ 29 47 1,110 743 160 106 57 31 53 - 37 37 - 29 1,060 181 101 Seoond- Runoff in Month foot-days Maximum Minimum Mean ao re-feet

October, ...... 1,673 73 45 54.0 3,320 November ...... 1,331 56 3( 44 4 2,640 December ...... 1,147 41 3E 37!o 2,280 Calendar year 1943 ...... 35,310 555 22 96.7 70,040 January...... 1,116 41 3C 36 0 2, 210 February...... 838 36 27 28.9 1,660 March...... 847 29 2^ 1,680 April...... 1,125 47 29 37J5 2,230 May...... 11,105 1,110 4£ 358 22,030 June ...... 24,942 1,350 59S 831 49,470 July...... 10,510 749 160 339 20,850 August ...... 4,191 177 94 135 8,310 September...... 1,921 92 53 64.0 3,810 Water year 1943-44 ...... 60,746 1,350 23 166 120,500 » Winter discharge measurement made on this day. Hate.- 6tage-discharge relation affected by Ice Hov. 27 to Jan. 12, Jan. 29-31, Feb. 5, 6, 11-22, Mar. 6-9, 16-19, 22, 23, 25-29. Ho gage-height record 8ept. 2-23j discharge computed on basis of records for Rock Creek near Mountain Home. Time basis! Mountain war time. ^o convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 213 Creek near Lapoint, Utah

Location.- Staff gage, lat. 40°22', long. 109°50', in SEi sec. 25, T. 1 S., R. 1 E. Ulnta meridian, 3 miles southwest of La Point and 34 miles upstream from mouth. Drainage area.- 72 square miles. Records available.- July 1942 to September 1944. Extremes.- r&ximum discharge observed during year, 44 second-feet June 5, 6; maximum gage height observed, 5.64 feet June 5; minimum discharge observed, 4.5 second-feet Sept. 6. 1942-44: Maximum discharge, 200 second-feet Aug. 29, 1943 (gage height, 8.2 feet from floodmark, site and datum then in use), from rating curve extended above 14 second-feet on basis of discharge graph determined from record for Uinta River at Fort Duchesne; minimum daily, 4 second-feet Jan. 19, Apr. 14, 15, 17, 20, 22, 23, 1943. Remarks.- Records fair. Gage read once daily. Many diversions above station for irrigation.

Discharge, in aecond-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 6.0 5.5 5.6 5.6 7.2 9.5 9.7 21 41 11 7.8 6.6 Z 5.5 5.S 6.2 «6.8 7.6 9.0 10 21 41 12 6.9 7.1 3 5.8 5.4 5.S W.O 7.2 8.4 12 20 42 12 6.5 6.2 4 5.8 5.2 6.4 W.O 7.0 8.8 12 20 43 16 7.2 5.S 5 5.5 5.4 8.0 b6.6 7.3 *8.1 11 20 44 17 7.4 5.0 6 5.6 5.1 9.0 W.2 S.O 6.6 8.1 21 44 IS 6.9 4.5 7 5.6 5.2 8.1 b7.0 7.6 6.6 12 20 42 IS 6.5 5.0 8 5.1 5.5 7.6 b6.8 8.1 6.S 15 20 43 16 6.6 5.4 9 5.4 5.S 7.2 b7.0 8.1 S.I 17 21 42 16 6.4 5.6 10 5.8 5.1 .6.6 b6.8 bS.O 8.4 17 22 41 14 7.1 7.4 11 5.4 5.1 6.0 b7.2 bS.O 9.1 16 23 40 11 6.S 6.4 12 6.0 5.4 6.1 b7.4 t>7.8 11 14 23 42 10 6.9 5.9 13 5.5 5.1 6.0 b7.4 b7.6 11 13 21 40 9.8 5.8 6.1 14 5.8 1 5.2 6.1 b7.0 bS.O 9.3 9.9 21 39 9.4 6.2 6.5 15 5.5 5.1 5.8 6.6 bS.O 8.8 10 22 38 8.S 5.S 6.9 IB 5.8 4.6 6.2 b7.0 b7.6 8.1 11 22 37 9.6 6.1 6.1 17 6.4 5.1 5.5 b7.0 bS.O 8.3 13 23 36 10 6.4 5.8 18 8.3 5.6 5.4 b7.0 b7.8 S.6 11 22 35 9.3 7.5 6.1 19 9.3 5.0 6.0 b6.8 b8.2 9.0 11 23 34 9.4 7.1 5.8 20 7.6 5.1 6.4 b6.8 b9.0 9.0 10 22 28 10 6.6 6.2 21 7.2 4.7 5.8 b6.8 9.5 7.8 9.9 25 19 11 6.1 6.4 22 6.6 5.0 6.1 b6.6 9.0 8.1 9.9 24 17 9.6 5.9 5.8 23 6.0 4.8 6.0 W.O 9.3 7.2 11 24 15 10 5.7 6.1 24 6.4 5.2 6.4 bS.O 8.3 7.5 12 26 15 11 6.4 5.8 25 5.8 4.8 6.6 8.3 9.3 7.5 12 29 13 9.6 5.9 6.1 26 6.0 5.1 6.8 9.0 9.1 6.4 11 31 17 9.0 6.8 5.9 27 6.1 5.6 5.6 8.8 il 6.0 10 36 18 8.8 7.2 6.2 28 5.8 5.5 5.4 b8.4. 10 6.6 12 39 20 9.4 7.4 5.7 29 7.0 5.4 5.8 bS.O 11 7.6 15 41 27 9.0 6.9 5.9 30 6.4 6.0 5.8 b7.8 _ * 7.2 20 37 24 8.0 7.1 6.2 31 5.4 - 5.5 7.5 - 8.0 - 40 - 8.5 6.6 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 190.4 9.3 5.1 6.14 378 157.4 6.0 4.6 5.25 312 December...... 195.8 9.0 5.4 6.32 388 Calendar year 1943 ...... 3,032.6 38 4 8.31 6,020 7 23

April ...... May...... June 977 44 13 32.6 1,940 July 7.8 6.66 410 September...... 180.7 7.4 4.5 6.02 358 Water year 1943-44 ...... 4,123.7 44 4.5 11.3 8,185 * Winter discharge measurement made on this day. b Stage-discharge relation affected by loe. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 314 GREEK RIVER BASIN

White River near Meeker, Colo.

Location.- Water-stage recorder, lat. 40°02', long. 107°52', in sec. 30, T. 1 N., R. 93 W., 1 mile upstream from Curtis Creek and 3i miles east of fteeker. Drainage area.- 762 square miles. Records available.- my 1901 to October 1906, May 1910 to November 1913 (at site 2i niles downstream), and October 1933 to September 1944 in reports of Geological Survey. May 1901 to October 1906 and May 1910 to September 1944 in reports of State engineer. Average discharge.- 39 years, 637 second-feet. Extremes.- Maximum discharge during year, 2,770 second-feet May 24 (gage height, 3.51 feet); minimum daily, 228 second-feet Jan. 5, Mar. 7, 8. 1901-6, 1910-44: Maximum daily discharge, 6,070 second-feet June 16, 1921; ninimum daily, 112 second-feet July 17, 1934. Remarks.- Records excellent. Diversions above station for irrigation.

Rating tables,, water year 1943-44 (gage height, In feet, and dldischarge, 1In second-feet) (Shifting-control method used Oct. 1-10, Oct. 29 to Hov. 1, Mar. 12 to Apr. 13, May 17 to Aug. 6) Oct. 1-31 Nov. 1 to Sept. 30 1.1 225 1.0 210 2.5 1,280 1.2 255 1.2 270 3.0 1,920 1.3 295 1.3 315 3.2 2,260 1.4 350 1.7 55E 3.4 2,680 1.5 410 2.1 8SO Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 275 342 288 264 320 246 274 416 2,360 ,280 359 264 2 275 302 310 249 297 252 261 442 2,400- ,200 348 261 3 271 310 274 306 267 255 267 418 2,240 ,170 348 261 4 271 327 268 302 274 249 284 364 1,970 ,120 337 261 5 263 342 292 228 264 252 288 394 1,680 ,030 342 261 6 255 342 315 284 252 246 297 454 1,560 934 337 258 7 252 320 310 270 258 228 297 571 1,630 838 332 252 8 252 288 315 240 279 228 279 627 1,650 731 326 249 9 255 320 302 258 292 261 279 667 1,720 683 332 249 10 255 348 302 267 270 258 284 880 2,030 675 326 249 11 263 342 270 315 234 255 288 829 2,220 667 326 252 12 306 326 267 264 261 274 292 934 2,260 579 337 261 13 306 320 264 255 252 406 306 1,300 2,060 536 332 261 14 322 315 297 302 258 424 364 1,640 2,060 522 332 258 15 317 310 274 320 274 359 354 1,940 2,000 503 342 267 16 312 306 258 320 25S 310 342 2,300 2,050 510 348 27ft 17 306 306 264 302 270 337 342 2,220 1,890 503 332 274 18 295 326 267 302 258 332 310 1,560 1,740 44S 337 270 19 322 320 315 302 252 306 315 1,350 1,750 442 342 267 20 322 315 315 315 258 302 306 1,290 1,940 478 342 261 21 312 315 302 315 261 288 . 306 1,440 2,060 472 320 261 22 312 326 297 315 258 270 302 1,480 2,030 472 302 264 23 306 332 279 337 246 297 292 1,970 1,850 460 297 264 24 295 320 292 342 252 302 292 2,440 1,790 466 297 279 25 295 320 264 332 25S 270 306 2,240 1,970 496 337 279 26 291 284 302 270 252 279 326 2,130 2,030 472 310 252 27 283 261 249 306 246 267 332 2,030 1,940 436 284 249 28 291 288 252 315 249 252 412 2,060 1,620 418 267 252 29 334 274 284 292 252 270 400 2,210 1,520 412 264 25S 30 356 267 310 288 _ 270 394 2,280 1,390 412 267 267 31 356 - 292 306 - 284 - 2,440 - 376 267

Second Mean Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 9,126 356 252 294 18,100 November...... 9 414 261 314 16,670 December ...... slgio 315 249 287 17,670 Calendar year 1943 ...... 187,668 2,060 210 514 372,200 January...... 9 , 083 342 228 293 18,020 February...... 7 , 622 320 234 263 15,120 March...... 8,829 424 228 285 17,510 April ...... 9 391 412 261 313 18,630 43,318 2,440 364 June ...... 57,410 2,400 1,390 1^914 113I900 July...... 19 ,735 1,280 376 637 39,140 August ...... 9 969 359 264 322 19 770 September ...... 7,'840 279 249 261 15)550 Water year 1943-44 ...... 200,647 2,440 228 548 398,000 Time basis: Mountain war time. To time to standard time, subtract 1 hour. (SEEN RIVER BASIN 215 White River near Watson, Utah Location.- Water-stage recorder, lat. 39°58', long. 109°10', In sec. 2, T. 10 S., R. 24 6. Salt Lake meridian, Just downstream from Evacuation Creek and 7 miles north of Watson. Datum of gage Is 4,949.78 feet above mean sea level, datum of 1929. Drainage area.- 4,020 square miles. Records available.- April to October 1906, published as White River near Dragon, and October 1933 to September 1944 In reports of Geological Survey. April 1923 to Sep­ tember 1944 In reports of State engineer of Colorado. Records of monthly discharge p'rlor to October 1938 have been republlshed, with some revisions and additions', in Water-supply Paper 918. Average discharge.- 21 years (1923-44), 749 second-feet. Extremes.- rSLXlmum discharge during year, 2,880 second-feet May 18 (gage height, 3.55 feet); minimum daily, 132 second-feet Dec. 30. 1906, 1923-44: Maximum daily discharge^ 8,160 second-feet July 15, 1929; minimum discharge, 52 second-feet July 19, 20, 1934. Remarks.- Records excellent except those for period of ice effect, and those for Sept. 1-30, which are fair. Diversions above station for irrigation.

Rating tables, water year 1943-44, except period of Ice effect (gage height, In feet, and discharge, In second-feet) (Shifting-control method used Sept. 7-30) Oct. 1 to Feb. 29 Mar. 1 to Sept. 3O 0.5 115 0.7 215 1.8 830 .6 140 .9 305 2.5 1.56O .8 205 1.1 405 2.9 2,040 1.0 290 1.4 570 3.6 2,950 1.2 400 1.4 540 Discharge, in second- feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 320 449 364 325 34O 470 432 648 2,400 1,310 345 251 2 310 442 37O 426 340 480 456 548 2,390 1,230 ;S20 251 3 281 407 376 330 350 520 449 548 2,460 1,170 ; S15 246 4 276 376 370 263 330 500 432 548 2,430 1,160 ; S1O 256 5 276 394 376 335 360 480 504 520 2,170 1,090 3O5 246 *6 272 407 376 3B2 350 430 532 482 1,870 1,010 3OO 242 7 26S 407 3S8 352 3SO 420 548 498 1,660 890 S1O 251 8 263 3S8 394 258 410 420 554 570 1,560 766 ; S10 246 9 25S 364 358 270 410 470 542 648 1,690 70S ; S10 242 10 25S 358 376 290 »380 540 520 750 1,600 642 355 238 11 290. 394 346 290 330 590 510 940 1,880 616 320 23S 12 491 3S8 364 260 350 650 498 1,170 2,060 60O SOO 236 13 376 38S 340 260 330 7OO 4S8 1,400 2,130 559 I 92 246 14 358 388 340 26O 35O 740 4S8 1,670 2,040 537 i"96 246 15 358 3S2 346 270 36O 780 504 1,840 1,940 515 292 246 16 358 »382 364 27O 340 SO6 504 2,33O 1,900 504 296 246 17 352 376 364 «270 36O *684 49S 2,360 1,900 476 £ 96 251 18 352 376 370 28O 37O 630 454 2,660 1,840 471 ^ 00 264 19 388 376 358 3OO 3SO 576 444 2,090 1,670 438 ; SOO 269 20 394 362 376 320 37O 570 427 1,340 1,600 43S 305 274 21 394 376 435 32O 370 5O4 422 1,6SO 1,680 449 296 264 22 400 382 414 32 O 370 449 410 1,720 1,800 444 £ 92 256 23 " 388 400 370 32 O 3SO 460 405 1,740 1,840 449 £ 74 256 24 382 414 35S 33O 4OO 438 395 2,170 1,730 4S2 £ 78 264 25 376 388 346 32 O 440 454 400 2,590 1,630 714 292 264 26 370 376 340 300 410 444 422 2,530 1,730 460 287 274 27 376 370 330 310 390 416 427 2,380 1,810 43S ; 00 282 28 364 340 358 340 410 405 454 2,220 1,850 400 £ S7 264 29 364 358 177 320 430 395 559 2,040 1,570 375 J 74 260 30 382 370 132 300 _ 395 702 2,160 1,420 365 £ 56 264 31 435 - 1S4 32O - 406 - 2,2OO - 360 251

Second- Runoff in Month foe t-days Maximum Minimum Mean acre-feet

October...... 10,730 491 258 346 21 November...... 11,598 449 340 23^000 December...... 10,760 435 132 347 21,340

Calendar year 1943 ...... 213,003 3,050 132 584 422,500 January...... 9,483 428 25S 306 18,810 February...... 10,790 440 33O 372 21,400 March...... 16,221 806 395 523 32 ,170 April ...... 14,380 702 395 479 28,620 May...... 47,510 2,66O 4S2 1,533 94,230 June ...... 56,290 2,460 1.42O 1,876 111,6OO July ...... 2O,06S 1,310 360 647 39,800 August ...... 9,2*64 355 251 299 18,370 September...... 7,635 2S2 23S 254 15,140 Water year 1943-44 ...... 224,729 2,660 132 614 445,700 » Winter discharge measurement m ide on this day. Note.- Stage-discharge relation iffeeted by ice Jan. 9 to Mar. 15. Time oasis: Mountain war time. To convert war time to standard time, subtract 1 hour. 216 (SEEN RIVER BASIN

South Fork White River near Buford, Colo. VP Location.- Water-stage recorder, lat. 39°55', long. 107°33', In SEi sec. 36, T. 1 S., R. 91 W., 50 feet upstream from Peltler Creek and 6 miles southeast of BuforQ. Drainage area.- 156 square miles. Records available.- July 1903 to October 1906, June 1910 to November 1915, October 1942 to September 1944. July 1919 to November 1920 at site 5 miles downstream (records not equivalent). Extremes.- ffeixlmum discharge during year, 1,820 second-feet June 21 (gage height, 5.09 feet), from rating curve extended above 1,350 second-feet; minimum dally, 74 second- feet Nov. 30. * 1903-6, 1910-15, 1942-44: mxiinum discharge observed, 3,230 second-feet June 17, 1906 (gage height, 8.2 feet, site and datum then In use), from rating curve extended above 1,600 second-feet; minimum dally recorded, that of Nov. 30, 1943. Remarks.- Records good except those for Dec. 1 to Apr. 30, which are fair. No diversion or regulation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 106 108 eo 87 92 84 89 96 1,300 734 163 112 2 IDS 96 38 83 90- S6 88 101 1,410 665 163 112 3 106 119 85 90 S7 88 90 94 1,240 660 161 111 4 106 114 89 90 93 90 94 94 992 645 155 111 5 106 106 87 84 89 90 99 101 7S8 565 151 108 6 106 99 90 87 S9 88 101 116 6S5 502 149 108 7 106 99 90 90 89 86 98 139 728 442 151 106 8 105 88 90'90 88 90 84 99 151 752 402 147 105 9 105 96 84 90 90 99 176 938 366 147 105 10 105 105 90 88 84 90 94 220 1,290 349 147 105 11 108 100 66 92 76 90 99 224 1,510 334 141 105 12 119 100 S2 88 86 90 108 235 1,600 304 137 104 13 112 9S S4 84 87 94 111 298 1,440 284 135 102 14 117 96 88 84 88 100 97 358 1,560 270 131 102 15 116 94 86 94 85 96 94 470 1,430 260 135 105 16 114 97 86 98 84 88 90 570 1,550 250 135 104 17 *112 108 87 94 87 90 92 580 1,330 235 131 102 18 108 94 87 94 88 «93 87 406 1,250 227 128 102 19 116 *94 92 *94 87 87 90 349 1,350 224 133 101 20 112 94 90 94 87 96 90 340 1,570 229 131 99 21 110 93 90 92 69 94 89 358 1,680 220 128 98 22 111 94 88 96 89 88 88 430 1,620 218 126 97 23 110 94 88 96 89 93 85 605 1,410 211 122 97 24 106 94 86 94 S9 92 89 776 1,400 216 124 97 25 110 93 84 90 88 86 90 746 1,520 222 139 97 26 110 80 90 84 86 93 92 758 1,480 200 124 97 27 110 75 86 90 87 69 93 782 1,240 1S9 121 97 28 112 79 87 92 36 32 99 . 818 986 183 117 97 29 121 78 86 92 86 92 96 926 950 178 116 98 30 117 74 90 88 - 93 94 1,080 854 174 116 101 31 111 - 92 90 - 90 - 1,230 - 170 114 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre feet

October ...... 3,421 121 105 110 6.79JO November...... 2,859 119 74 95.3 5,670 December...... 2,714 92 80 87.5 5,380 Calendar year 1943 ...... 78,382 1,150 74 215 155,500 January ...... 2,791 98 83 90.0 5,540 February 2,537 93 76 87.5 5,030 Haroh...... 2,792 100 82 90.1 5,540 April ...... 2,824 111 85 94.1 5,60O Bay...... 13,627 1,230 94 440 27,030 June ...... 37,853 1,680 685 1,262 75,030 July...... 10,128 734 170 327 20,090 August ...... 4,218 163 114 136 8,370 September . .\ ...... 3,085 112 97 103 6,120 Water year 1943-44 ...... 88,849 1,680 74 243 176,200 * Winter discharge measurement made on this day. Mote. - Stage-d Is charge relation affected try Ice Nov. 9-12, 27, Dec. 6-13, 19-26, Jan. 19 to Feb. 1, Feb. 2, 7, 8. No gage-height record Jan. 2-1S, Mar. 2-17 (stage-discharge relation probably affected by Ice during part of period); discharge computed on basis of weather records and records for White River near Keeker. Time -basis; Mountain war time. To convert war time to.atondard time, subtract 1 hour. ORBEM RIVSR BASIN 217,

Price River above Scofleld Reservoir, near Scofleld, Utah

Location.- Water-stage recorder, lat. 39°46', long. 111°11', In SEi sec. 18,' T. 12 S.~, R. 7 K., at mouth of canyon, 800 feet upstream from bridge, half a mile upstream from Pontown Creek, and 4 miles north of Scofield. Drainage area.- 62 square miles. Records available.- June 1931 to September 1932 (fragmentary), October 1938 to September 1944. Extremes.- Maximum discharge during year, 577 second-feet May 15 (gage height, 3.00 feet); minimum dally recorded, 7.4 second-feet Sept. 21-23, but may have been less during period of'Ice effect. 1931-32, 1938-44: Maximum discharge, 673 second-feet May 19, 1932; minimum re­ corded, 3 second-feet Sept. 10-30, 1932, Nov. 9, 1942, but may have been less during periods of Ice effect or no gage-height record. Remarks.- Records good except those for period of Ice effect, which are fair. Small transmountaln diversions in headwaters for Irrigation in Sevier River Basin, and one diversion above station for Irrigation.

Rating table, water year 1943-44, except periods of lee effect (gage height, In feet, and discharge, In second-feet) (Shifting-control method used Oct. 1 to Nov. S3) 0.2 4.5 0.8 273 .3 8.1 1.0 e'.e, 405 .4 13 1.4 11S 3.0 577 .6 26 1.8 184

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 8.1 b!4 D13 32 390 69 17 10 2 8.1 b!2 b!4 32 413 66 17 10 3 8.C b!2 »b!7 33 437 6166 J 16 U 4 8.6 b!2 b20 40 361 15 11 5 S.6 12 b23 57 312 56 14 11 6 8.6 b!2 b27 85 282 52 14 10 7 8.6 toll b31 114 288 50 14 10 8 9.0 toll b28 144 268 46 12 11 9 9.0 »b!2 b27 190 260 43 12 10 10 8.6 b!2 b26 255 252 41 13 10 11 12 bll 29 265 242 39 13 10 12 17 D10 29 328 231 33 IS 10 13 13 DID 29 401 216 37 12 10 14 12 DID 26 453 197 34 13 10 IS 11 DID b23 509 180 . 33 15 9.5 > b9 b8 b8 > D10 . 16 10 b9 b22 522 164 31 14 9.0 17 10 b9 b21 466 151 31 13 7.7 18 10 8.1 b20 361 133 30 14 7.7 19 18 b8 20 341 122 30 14 3.1 20 15 7.7 21 302 112 31 13 7.7 21 13 3.1 21 344 103 .28 13 7.4 22 14 S.6 19 417 96 26 12 7.4 23 13 9.0 20 500 90 26 IE 7.4 24 12 19 509 79 25 12 7.7 25 12 19 4S7 89 24 12 7.7 26 12 . b9 21 458 108 23 11 8.6 27 13 (*) 23 437 90 22 12 8.6 28 15 * 24 409 81 21 ~1112 8.6 29 16 24 405 75 19 8.6 30 16 _ 26 413 71 18 10 9.5 31 16 - - - 409 - 17 10 -

Seoond- Runoff in Month foot-days Maximum Mininum Mean ao re-feet

October...... 365. £ 18 S.3L 11.3 726 November...... 301.5 14 7.'r 10.0 698 Deoenber ...... 279 9 553 Calendar year 1943 ...... 14,264.3 241 7 39.1 23,290 January...... "...... 248 _ _ 8 492 February...... \ ...... 232 _ _ 8 460 March...... 310 _ _ 10 615 April...... 682 31 13 22.7 1,350 May 9,718 522 32 313 19,280 June ...... 5,893 437 71 196 11,690 July...... 1,133 69 17 36.5 2,250 August ...... 405 17 10 13.1 803 September ...... 275.2 11 7.^I 9.17 .546 Water year 1943-44 ...... 19,842.5 522 1.' 54.2 39.360 * Winter discharge measurement made.on this day. b Stage-discharge relation affectsd by Ice (no gage-height record Jan. 5 to Apr. 2; discharge com­ puted on basis of 3 discharge measurements, weather records, and records for stations on nearby streams). Time baais; Mountain war tlmev To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 15 318 GREEN RIVER BASIN

Scofield Reservoir near Scofleld, Utah

Location.- Inclined staff gage, lat. 39°47', long. 111 008', in sec. 10, T. 12 S.. R. 7E77~300 feet from face of dam on Price River and 5 miles northeast of Scofield. Datum of gage is 4.51 feet above mean sea level, datum of 1939. Drainage area.- 163 square miles. Records avallable.- October 1941 to September 1944. Fragmentary records 1936 to 1941 on rue in orrice of State engineer. i Extremes.- Maximum contents during year, 31,740 acre-feet June 14-18 (gage height, 775S5750 feet); minimum, not determined. 1941-44: Maximum contents, 32,370 acre-feet May 28, 29, 1943 (gage-height, 7,596.75 feet); minimum observed, 3,030 acre-feet Oct. 36, 1943. Maximum contents known, about 56,500 acre-feet at time first failure occurred Hay 31, 1928 {gage height, about 7,607.2 feet). Remarks.- Reservoir is formed by earth-, and rock-fill, rock-faced dam. Storage began in May 1926. Original capacity, about 61,000 acre-feet. Due to several partial failures capacity is now limited to 30,000 acre-feet between gage heights 7,571.0 feet (bottom of outlet tunnel) and about 7,5^6.7 feet (top of 5-foot flashboard control on spillway). Dead storage negligible. Gage read to half-tenths about 9 a.m. daily; figures given herein represent usable contents at that time. Water used for irrigation in vicinity of Price.

Contents, in acre-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Har. Apr. ' May June July Aug. Sept. 1 e3,720 e4,900 e6,000 7,150 e8,300 9,560 10,830 13,960 25,150 30,280 19,980 10,900 2 _ - - 13,960 25,640 30,280 19,530 10,570 Z 8,420 - - 13,960 27,120 30,280 19,080 10,240 4 _ ~ _ 13,730 27,630 30,280 18,640 9,930 5 - - - 13,730 28,130 30,280 18,210 9,800 6 _ _ _ 13,730 2S.640 30,280 17,770 9,620 7 - _ _ - 13,730 ^39,140 30,170 17,350 9,310 8 - - - 13,730 29,660 29,660 17,010 9,010 9 _ _ - 13,960 30,170 29,140 16,610 8,720 10 - - - 14,500 30,690 28,640 16,090 8,420 - 11 _ _ _ 15,280 30,690 28,640 15,690 8,140 12 - - - 15,520 31,210 28,130 15,260 7,860 13 - - - 16,090 31,530 27,630 15,120 7,580 - * 14 * _ 16,920 31,740 27,120 14,890 7,310 15 - - - 18,210 31,740 26,630 14,500 7,050 16 _ _ _ 18,730 31,740 26,230 14,110 6,790 17 - - - 19,980 31,740 25,640 14,110 6,280 18 - - 19,980 31,740 25,640 13,960 6,030 19 -. _ 13,060 19,980 31,210 25,150 13,730 5,830 20 - - - 19,980 31,210 25 , 150 13,360 6,690 21 _ _ _ 19,980 31,210 24,670 12,990 5,500 22 - - - 19,980 31,210 24,180 12,990 5,310 23 - - - 20,430 31,210 23,700 12,630 5,220 24 _ _ - 20,430 30,690 23,230 12,270 5,130 25 - - - 21,350 30,690 22,750 12,270 5,040 26 _ _ _ 21,820 30,690 22,380 12,270 4,900 27 - - 14,110 21,820 30,690 22,280 11,920 4,770 28 - - 14,110 22.S80 30,690 21,820 < 11,570 4,630 29 _ - - 2E.750 30,690 21,350 11,370 4,500 30 - - _ 23,230 30,480 20,890 11,230 4,370 31 - 10,830 - 24, ISO - 20,520 11,100 - e Interpolated.

Monthly gage height and contents, mater year October 1943 to September 1944 Change in contents Date Gage height Contents during month (feet) (acre-feet) (acre- feet) Oct 1 +1,180 Dec. 1...... - e6,000 +1,150 Calendar year 1943.... _ . ( 920 +1,150

593 25 Aug. 1...... 584 75 Oct. 1...... ,578.70 4,370 Water year 1943-44.... - - +650

e Interpolated. Time basis: Mountain ar time. To convert war time to standard time, subtract 1 hour. GREEK RIVER BASIN 319

Price River near Scofield, Utah

Location.- Water-stage recorder and concrete control, la,t. 39°47', long. 111°07', in &Ef sec. 10, T. 12 S., R. 7 E., 1,000 feet downstream from Scofield Reservoir, 5 miles northeast of Scofield, and 9 miles upstream from White River. Drainage area.- 163 square miles. Records available.- November 1917 to September 1921, June to September 1925, April 1926 to septemoer lyisl, October 1938 to September 1943. Average discharge.- 11 years (1926-31, 1938-44), 62.2 second-feet.' Extremes.- Maximum discharge during year, 494 second-feet (regulated) May 19; practically no now at times when reservoir gates were closed. 1917-20, 1926-31, 1938-44: Maximum discharge, 1,000 second-feet on or about May 24, 1920 (gage height, 10.4 feet from floodnferk, site and datum then in use), from rating curve extended above 500 second-feet; practically no flow at times when reser­ voir gates were closed. Remarks.- Records good except those for periods of no gage-height.record, which are rair. Flow completely regulated by Scofield Reservoir (see preceding page). Small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1 1 114 155 136 206 126 2 1 1 114 157 65 202 134 3 1 1 114 15S 32 198 140 4 1 1 114 159 32 195 144 5 1 1 el!4 161 156 195 14S 6 1 1 el!4 162 184 195 145 7 1 1 e!14 162 182 195 143 8 1 1 el!4 164 206 195 146 9 1 i 1 el!4 166 218 193 148 10 4 1 el!4 167 218 186 149 11 9.2 1 el!4 16S 216 178 149 12 9.2 1 el!4 16S 214 184 146 13 9.6 1 el!6 170 211 184 145 14 9.6 1 e!90 184 214 182 141 15 - 10 1 e240 250 222 178 137 1 1 1 1 > 1 16 10 1 e325 250 226 172 132 17 10 1 413 24S 226 171 127 18 10 1 455 242 193 153 123 19 10 1 475 234 206 135 115 20 10 1 489 191 218 133 104 21 5 1 475 182 216 132 95 22 1 1 464 - 186 206 141 91 23 1 1 44S 1S6 206 145 88 24 1 1 435 185 212 120 84 25 1 1 417 185 216 27 78 "184 26 1 1 39S 216 109 71 27 1 60 378 184 211 109 65 28 1 114 364 1S2 214 63 29 1 114 221 182 212 S! 60 30 1 _ 114 152 181 211 119 54 31 1 - - - 154 210 117 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 125.6 10 1 4.1 249 November ...... 30 1 60 December ...... 31 _ - 1 61 Calendar year 1943 ...... 20,403.6 239 _ 55.9 40,460 January...... 31 1 61 February...... 29 _ 1 58 March...... 31 1 61 April ...... 42S 114 1 14.3 849 May...... 7 Q77 489 114 257 15,820 June ...... 5)553 250 155 185 11,010 July...... 5,905 226 32 190 11,710 August ...... 4,883 206 2V 15S 9,690 September ...... 3,491 149 5^ 116 6,920 Water year 1943-44 ...... 28,514.6 489 - 77.9 56,550 e Stage-discharge relation indefinite; discharge computed on basis of discharge measurement iu= May 5, 12 and records for station near Heiner. Note.- No gage-height record Oct. 1-10, Oct. IS to May 4; discharge computed on basis of field estimate made Oct. 25 and record for station near Heiner. Time basisr Kountain war time. To convert war-time JB standard time, subtract 1 hour. 220 GREEN RIVER BASIN

Price River near Heiner, Utah

Location.- Water-stage recorder, lat. 39 043'05", long. 110°51'55", in SWi sec. 1, T. 13 3., R. 9 E., two-thirds of a mile north of Heiner and three-quarters of a mile downstream from Willow Creek. Records available.- June 1934 to September 1944. Average discharge.- 10 years, 117 second-feet. Extremes.- Maximum discharge during year, 868 second-feet (regulated) May 18 (gage height, 3.44 reet); minimum, not determined, occurred during period of ice effect. 1934-44: Maximum discharge, 9,340 second-feet Sept. 13, 1940 (gage height, 7.98 ' feet), by slope-area method; minimum, less than 1 second-foot at times Sept'. 1-10, 1934. Remarks.- Records good except those for periods of ice effect or no gage-height record,- wnicn are fair. Station is above diversions from main stream for irrigation. Several small diversions from tributaries above station for irrigation and municipal supply. Flow affected by Scofield Reservoir (see p. 218).

Rating table, water year 1943-44, except period of Ice effect (gage height. In feet, and discharge, In second-feet) (Shifting-control method used Mar. 13 to Apr. 8} 0.6 7.0 1.3 63 2.6 415 .7 11 1.6 111 3.0 609 .8 16 1.9 177 3.4 840 1.0 30 2.2 S65

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept.

' 1 12 10 b7 74 23S 386 238 229 129 2 12 11 b7 97 254 394 193 226 135 3 11 10 blO 138 266 386 144 218 153 4 10 10 (*) blO 160 280 357 127 212 al60 5 9.8 12 17 180 297 346 170 206 a!65 6 S.2 9.0 22 1S7 342 338 257 206 al60 7 7.8 S.6 25 158 402 327 232 206 158 8 7.8 *S6 129 446 319 251 203 153 9 7.4 35 S2 484 31S 270 206 153 10 7.0 (*) 95 102 542 303 £66 200 158 11 16 114 140 557 301 266 185 153 12 *19 68 135 567 S97 263 137 155 13 18 47 93 593 297 260 185 153 14 17 37 77 620 290 257 185 149 15 17 26 63 709 346 260 185 146 b6 bS > b7 16 17 25 71 792 361 266 . 185 140 17 17 34 66 822 361 266 177 135 18 30 60 66 834 354 241 170 125 19 100 b7 53 60 816 330 ESS 146 123 20 26 46 64 786 290 260 142 113 21 S3 30 66 756 260 257 140 102 22 21 28 66 744 257 248 144 97 23 14 37 64 733 257 257 155 95 24 12 54 64 726 254 294 153 90 25 12 29 66 709 257 263 77 > 87 26 12 26 66 680 301 257 ' 93 82 27 12 26 67 653 270 251 119 77 28 12 (*) 21 185 620 257 244 119 74 29 12 28 209 542 251 233 123 69 30 12 _ 53 223 411 244 235 129 64 31 10 ~ - 74 411 - 232 121

Seoond- Runoff in Month foot-days Maximum Minimum Mean acre feet

October...... 522.0 100 7.C 16.8 1,040 November...... 231.6 12 7.72 459 December...... 186 - 6 369 Calendar year 1943 ...... 33,148.6 306 _ 90.8 65,740 January...... 155 5 307 February...... S03 _ _ 7 403 March 1,175 114 7 37.9 2,330 April ...... 3,S18 223 60 107 6^380 Hay 17,636 834 232 569 34 900 June...... 9,308 oy*«QJ! 244 310 18^460 July...... 7,501 294 127 24£ 14,880 August ...... 5.S32 229 77 169 10,380 September...... 3,763 165 64 125 7,460 Water year 1943-44 ...... 49,130.6 834 - 134 97,450 * Winter discharge measurement made on th]£ day. a No gage-height record; discharge computed on basis of record for station near 3cofleld. b Stage-discharge relation affected by lee. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 221

Gooseberry Creek near Scofield, Utah

Location.- Water-stage recorder, lat. 39°43', long. 111°18', In 8W£ sec. 6, T. 13 a., T*. 6 E., 300 feet downstream from old Jfeunmoth Dam, 5i miles upstream from confluence with Price River,' and 7 miles west of Scofleld. Drainage area.- 16.4 square miles. Records available.- October 1930 to September 1931, May 1940 to September 1944. Extremes.- Tfexlmum discharge during year, 265 second-feet May 15 (gage height, 1.95 feet); minimum not determined (occurred during period of no gage-height record). 1930-31, 1940-44: Ifexlmum discharge, 366 second-feet I1ay 18, 1941 (gage height,. 2.25 feet); minimum discharge recorded, 2 second-feet on many days In August and September 1931. Remarks.- Records good except those for periods of no gage-height record, which are fair. Transmountaln diversion above station to Sevler River Basin for Irrigation, part of which is water diverted Into Gopseberry Creek from Boulger Creek. A small reservoir on Gooseberry Creek 5 miles above station (capacity, about 1,900 acre-feet) Is used to regulate these diversions.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3.5 10 170 30 9.5 6.5 2 3.5 11 170 28 9.5 , 6.0 3 3.5 12 180 29 8.6 6.0 4 3.5 17 160 26 e.5 5.5 5 3.5 24 150 24 S.5 L 5.0 6 3.5 35 140 23 8.5 5.0 7 3.5 50 140 21 8.0 5.0 8 3.5 60 128 21 8.0 5.5 9 3.5 80 126 20 8.5 5.5 10 3.5 100 130 19 8.5 5.5 11 4.7 110 130 IS 8.0 5.5 12 6.0 130 126 18 7.6 5.5 13 5.0 170 117 17 s.o 5.0 14 4.4 210 106 16 s.o 5.0 IS 4.4 220 94 15 e.o 4.7 ( 4 I 4 3 S 3.5 5 18 4.1 1S9 85 15 7.5 4.7 17 4.7 147 77 14 7.0 4.4 18 6.5 140 61 14 7.0 4.4 19 6.0 130 54 14 7.0 4.7 20 5.5 120 60 14 6.5 4.7- 21 5.0 147 46 14 6.5 4.7 22 4.7 201 43 12 6.0 .4.4 23 212 41 12 6.0 4.4 24 212 39 12 6.0 4.4 25 200 40 12 6.0 4.4 26 190 51 12 6.0 4.4 27 180 43 12 7.0 4.4 28 170 37, 11 7.0 4.4 29 170 34 11 6.0 30 170 32 10 6.0 11 31 - - - 170 - 10 6.5 - Seoond- Runoff in Month foot-days Maximum Minion* Mean acre-feet

November...... ISO _ 4 238 December...... 134 - . 4 246 Calendar year 1943 ...... 6,013.5 117 _ 16.5 11,930 93 3 184 87 _ _ 3 173 108.5 _ 3.5 . 215 150 _ _ 5 , 298 May...... 220 129 7,910 June 2,SOO ISO ss 93.3 5,550 30 10 16.9 1,040 229.5 9.5 6.0 7.40 455 September...... 148.4 6.5 4.4 4.95 294 Water year 1943-44 ...... 8,607.9 220 - 23.2 16,870 Kote.- Ho gage-height record Oct. 23 to Mar. 27, tor. 29 to Itoy 15, Hay 18-20, May 25 to June 7; discharge computed on basis of weather records, records for Price River above Scofleld Reservoir, near Scofleld, and other stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 222 GR N RIVER E&SIN

White River near Soldier Summit, Utah

Location.- Water-stage recorder and concrete control, lat. 39°55', long. 111°04', in SEt sec. 30, T. 10 S., R. 8 E., 600 feet downstream from North Fork and 1 mile south­ east of Soldier Summit. Records available.- April 1938 to September 1944. Extremes.- Maximum discharge during year, 241 second-feet May 9 (gage height, 2.96 feet); minimum daily recorded, 2.6 second-feet Oct. 4 (less during periods of ice effect). 1938-44: Maximum discharge, 288 second-feet May 10, 1941 (gage height, 3.70 feet); no flow at times in July, August, and September 1939. Remarks.- Records good except those for periods of ice effect, which are fair. Two small diversions from North Fork for irrigation.

Discharge, in second-feet. water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. I Mar. Apr. May June July Aug. Sept. 1 2.9 4.0 t>23 56 53 19 6.4 3.5 2 2.6 3.5 > t>24 67 55 19 6.4 3.5 3 2.8 3.5 1 h *b35 67 52 19 5.3 3.5 4 2.6 3.5 (-») 40 72 4S IS 5.3 3.5 5 2.9 3.5 41 90 43 18 5.3 3.5 6 3.0 3.5 43 114 43 17 5.0 3.5 7 2.9 3.5 45 138 45 16 5.0 3.5 8 2.9 3.5 t>4 38 163 41 13 5.0 3.2 9 S.O 3.2 33 189 40 13 5.0 2.9 10 3.0 3.2 (*) 32 226 39 13 5.0 3.2 11 4.0 3.2 36 204 38 12 4.7 2.9 12 4.4 3.0 40 201 35 12 4.7 3.2 13 3.5 3.0 36 203 34 12 4.4 3.2 14 3.4 3.0 33 203 S3 11 4.4 3.2 15 3.2 3.2 27 208 32 11 8.3 3.2 > b3 > te.5 ' b2.5 16 3.2 3.2 26 192 31 11 6.0 3.2 17 3.4 3.2 25 165 30 11 5.3 3.5 18 3.2 3.2 24 136 29 10 5.3 3.5 19 6.2 3.4 24 118 28 9.5 5.3 3.5 20 4.8 3.2 26 107 26 9.5 5.0 3.5 21 4.4 3.2 25 103 25 9.1 5.0 3.5 22 5.3 3.5 25 98 24 8.7 4.7 3.5 23 4.4 4.4 28 94 24 S.3 _4.7 3.5 24 4.4 3.4 ' b8 33 89 22 8.7 4.4 3.5 25 4.4 3.5 33 84 24 8.3 5.0 3.5 26 4.4 3.2 34 78 28 7.9 4.7 3.5 27 4.4 3.2 (*) 40 72 23 7.6 4.7 3.8 28 '4.44.4 3.2 43 67 21 7.2 4.4 4.1 29 3.2 46 62' 20 7.2 4.1 4.1 30 4.8 3.0 _ 53 63 20 6.S 4.1 4.1 31 4.4 - 57 - 6.4 3.8 - Second- Runoff in Month fee t-days Maximum Minimum Mean acre-feet

October...... 117.8 6.2 2*6 5 .80 234 November...... ioo!s 4.4 3.0 s'.o5 54 199 December ...... 93 184 Calendar year 1943 ...... 5,548.1 110 . 15.2 11,010 January...... 77.5 2.5 154 February...... 72.5 _ _ 2.5 144 March...... 188 _ _ 6.1 373 ' April...... 1,011 53 23 33. 7 2,010 May...... 3,786 226 56 122 7,510 June ...... 1,006 55 20 i 33.5 2,000 July...... 360.2 19 6.4 11.6 714 August ...... 156.7 8.3 3.8 5.05 311 September ...... 103.8 4.1 2.9 3.46 206 Hater year 1943-44 ...... 7,072.8 226 - 19.3 14,040 * Winter discharge measurement made on this day. b Stage-discharge relation affected t>y Ice (no gage-height record Dec. 11-26, Jan. 8 to Apr. 3; discharge computed on basis of 4 discharge measurements, weather records, and records for stations on nearby streams). Time basis : Mountain war time. To convert war time to standard time, subtract 1 hour. GREEN RIVER BASIN 233 i North Fork White River near Soldier Summit, Utah

Location.- Water-stage recorder, lat. 39°56', long. 111°04', in NEi sec. 30, T. 10 S., R. 8 E., 500 feet upstream from mouth and 1 mile southeast of Soldier Summit. Records available.- October 1942 to September 1944. April 1938 to September 1942 ( fragmentary) in files of Bureau of Reclamation. Extremes.- Maximum discharge during year, 121 second-feet May 9 (gage height, 3.50 feet); minimum daily, 0.1 second-foot Oct. 8. 1942-44: Maximum discharge, that of May 9, 1944: minimum, no flow at times during 1942-43. Remarks.- Records good except those for period of no gage-height record, which are fair. One small diversion above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 , 0.7 10 32 20 5.4 1.0 0.6 2 .5 10 35 21 5.2 .9 .6 3 .5 11 36 20 5.2 .6 .6 4 .6 16 39 19 5.0 .5 .6 5 .6 18 49 18 5.0 .5 .6 6 .6 20 63 18 4.8 .5 .6 7 .3 25 73 17 3.7 .5 .6 8 .1 1.0 19 83 16 1.4 .6 .6 9 .2 17 95 15 1.3 .5 .6 10 .3 15 113 14 1.2 .5 .5 11 .6 17 99 14 1.2 .6 .4 12 .9 23 96 13 1.2 .6 .4 13 .6 21 92 13 1.2 .5 .4 14 .6 19 S5 12 1.2 .4 .5 15 .6 15 64 12 1.1 .7 .6 > 1.0 > 0.9 > 0.8 0.8 1 16 .8 12 78 11 1.1 1.0 .6 17 .7 1 11 70 11 1.0 1.5 .6 18 .8 10 60 10 1.0 1.2 .6 19 1.4 9.9 55 9.6 .8 1.3 .6 20 1.4 11 51 8.2 .9 1.2 .6 21 1.5 10 46 7.0 .9 1.2 .6 22 1.5 9.0 45 6.8 .9 1.1 .6 23 1.4 2.0 10 48 6.8 .8 1.0 .7 24 1.4 13 40 6.3 .9 .8 .8 25 1.5 13 36 7.2 1.0 1.1 .7 26 1.5 14 38 9.3 1.0 .9 .7 27 1.8 17 28 7.2 1.2 .8 -8 28 1.0 20 25 6.3 1.1 .7 .8 29 1.8 21 23 5.8 1.1 .6 .8 30 1.2 _ 24 23 5.4 1.1 .6 .8 31 1.3 - - - 28 - 1.1 .6 -

Second- Runoff in Month foot days Maximum Minimum Mean acre-feet

October...... 26.9 1.5 0.1 0.87 55 November...... 30.0 ' 1.0 60 December...... >...... 27.9 - -.9 55 Calendar year 1943 ...... 2,310.8 57 0 6.53 4,590 January...... 24.8 .8 49 February...... 23.2 _ _ .8 46 March...... 47.0 _ _ 1.52 93 April...... 460.9 25 9.0 15.4 914 Hay...... 1,752 113 22 56.5 3,480 June ...... 359.9 21 5.4 12.0 714 July...... 60.0 5.4 .8 1.94 119 August ...... 24.3 1.3 .4 .78 48 September ...... 18.5 .8 .4 .68 37 Water year 1943-44 ...... 2,855.4 113 .1 7.80 5,670 Kote.- No gage-height record Mov. 1 to Apr. 15 (stage-discharge relation affected by Ice during most of period); discharge computed on basis of field estimates of discharge Nov. 9, Dec. 27, Feb. 4 discharge measurements Apr. 3, 15, weather records, and records for stations on nearby streams. Time basis; JJountain war time. To convert war time to standard time, subtract 1 hour. 324 GREEN RIVER BASIN

Huntington Creek near Huntington, Utah

Location.- Water-stage recorder, lat. 39°32'15", long. 111003'45", in SEi sec. 6, T. 17 S.y R. 8 E., 1 mile upstream from Fish Creek and 7 miles northwest of Huntington. Drainage area.- 188 square miles. Records available.- May 1909 to September 1917, October 1918 to November 1920 (frag- mentaryj, April 1921 to September 1944. Average discharge.- 29 years (1910-17, 1921-29, 1930-44), 99.8 second-feet. Extremes.- Maximum discharge during year, 1,020 second-feet May 15 (gage height, 4.06 reet;; minimum, 8.2 second-feet Nov. 7, but may have been less during periods of ice effect. 1909-44: Maximum discharge, 2,500 second-feet Aug. 2 or 3, 1930 (gage height, 7.5 feet, from floodmark), from rating curve extended above 600 second-feet; minimum re­ corded, 2 second-feet Nov. 5, 1926, during period of ice effect, but may have been less during other periods of ice effect. Remarks.- Records good except those for periods of ice effect, which are fair. Small aiversions above station for irrigation. Flow slightly regulated by small reservoirs above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. ay June July Aug. Sept.

1 34 30 33 29 39 48 755 261 117 60 2 34 £5 33 30 40 50 705 249 121 53 3 34 35 33 30 45 50 655 235 119 47 4 34 34 33 29 45 52 545 216 119 45 5 35 35 34 (*) 28 51 62 482 205 117 44 6 36 29 32 27 56 94 473 178 113" 42 7 33 21 31 25 56 132 518 167 111 41 8 33 30 30 24 53 163 518 156 113 41 9 34 39 33 «30 51 255 564 14S 115 40 10 33 *31 33 36 48 31S 555 140 111 40 11 36 29 30 35 46 359 541 134 IDS 39 12 41 28 30 3E 50 44S 573 130 108 S3 13 37 2S 29 33 47 550 611 156 106 39 14 35 24 28 32 45 641 597 154 106 39 15 33 24 28 30 39 745 559 150 106 39 > 23 t 25 16 33 24 26 36 45 740 509 144 104 39 17 31 25 25 37 40 583 452 142 101 39 18 37 23 £6 34 41 427 435 161 104 39 19 47 24 27 34 38 410 423 15S 102 40 20 34 26 30 35 44 363 423 156 99 39 21 42 24 32 34 41 44S 402 146 97 39 22 39 31 29 35 40 5S7 355 140 95 3S 23 37 29 28 35 38 680 348 140 92 38 24 36 24 21 34 44 700 333 13S 95 38 25 3S 33 23 3E 44 700 352 134 92 38 26 3? 22 25 31 41 680 448 136 87 38 27 38 21 23 36 45 675 359 140 85 37 28 40 28 *22 37 47 685 329 136 80 37 29 38 2528 21 40 45 735 294 134 80 37 30 35 22 _ 39 45 790 284 130 77 37 31 29 - 23 - 41 - 780 - 126 71 ~ Seccnd- Runoff in Month fcot-days Maziatio Minimum Mean acre-feet October...... 1,115 47 2£ 36.0 2,210 November...... 832 39 2] 27.7 1,680 December...... 873 34 2] 28.2 1,730 Calendar year 1943 ...... 31,042 446 - S5.0 61,570 January...... 713 23.0 1,410 February...... 725 _ _ 25.0 1,440 March...... 1,020 41 24 32.9 2,020 April...... 1,349 56 3£ 45.0 2,680 May...... 13,950 790 4E 450 27,670 June ...... 14,397 755 S84 480 28,560 July...... 4,940 261 I2e 159 9,800 August ...... 3,151 121 73 102 6,250 September...... 1,2E1 60 31! 40.7 2,480 Water year 1943-44 ...... 44,286 790 - 121 87,840 * Winter discharge measurement made on this day. Note.- Stage-discharge relation affected by ioe Dec. 10, 12, 13, 16-20, Dec. 25 to Mar. 9 (no gage- height record Jan. 10 to Feb. 5, Feb. 12 to Mar. 9; discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby streams. Time basis; Mountain war tine. To convert war time to standard time, subtract 1 hour. (JREEN RIVER-BASIN 225

Boulger Creek near Falrview, Utah

Location.- Water-stage recorder, lat. 39°38', long. 111°16', in NWi sec. 4, T. 14 S., , R. e £., 2 miles upstream from mouth and 9^ miles east of Fairview. Records available.- May 1938 to September 1944. April to September 1928, May to septemoer I9t;9, and April to August 1931 in files of State engineer. * Extremes.- Maximum discharge during year, 61 second-feet May 31 (gage height, 2.11 reet); minimum discharge recorded, 0.7 second-foot Mar. 28-31, but may have been less during winter period of no gage-height record. 1938-44: Maximum discharge, 69 second-feet May 16, 1940 (gage height, 2.11 feet); minimum daily recorded, that of Mar. 28-31, 1944, but may have been less at times each year. Remarks.- Records good except those for periods of no gage-height record, which are fair. Diversion above station to Gooseberry Creek Basin where water is rediverted to Sevier River Basin for irrigation.

Discharge, in second-feet, 'water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1.3 0.7 o.s 45 8.0 2.2 1.4 2 1.3 .7 .9 37 7.7 2.1 1.4 3 1.3 .7 .9 28 7.2 1.9 1.4 4 1.3 .7 .9 82 6.6 1.9 1.4 5 1.3 .7 .9 21 5.9 1.8 1.3

6 1.3 (*) .7 .9 21 5.6 1.8 1.3 7 1.3 .7 1.0 23 5.4 1.8 1.3 8 1.3 X .7 1.2 28 4.9 1.9 1.3 9 1.3 .S 1.2 33 4.7 1.9 1.3 10 1.3 .8 2.2 30 4.5 1.9 1.3 11 1.6 .8 4.9 27 4.4 1.8 1.3 12 1.4 .8 9.6 26 4.2 1.8 1.3 13 1.4 -, .8 11 ' 28 3.8 1.8 1.3 14 1.3 , -()*« " .8 14 24 3.8 1.8 1.3 15 1.3 .8 17 21 3.8 1.8 1.3 al.l > al.O > aO.9 > aO.8 16 1.3 .S 17 19 3.6 1.7 1.3 17 1.2 .8 14 17 3.6 1.8 1.3 18 1.4 .S 11 16 3.6 1.8 1.3 19 b2.0 .8 10 16 3.6 1.7 1.3 20 bl.5 .8 10 15 3.6 ' 1.6 1.3 21 1.4 .S 14 14 3.5 1.6 1.3 22 1.4 .8 19 12 3.3 1.5 1.3 23 1.4 .8 23 11 3.3 1.5 1.3 24 1.4 .8 25 11 3.3 1.5 1.3 25 al.4 .e 26 11 3.0 1.4 1.3 26 al.4 .S 26 12 2.8 1.4 1.3 27 al.5 .8 26 10 2.7 1.4 1.3 28 al.5 0.7 .S 31 9.3 2.7 1.4 1.2 29 al.4 .7 .S 36 8.7 2.6 1.4 1.3 30 al.4 - .7 .8 45 S.4 2.4 1.4 1.3 31 al.5 ~ ~ .7 48 2.3 1.4 Second- Runoff ia Month foot-days Maximum Minimum Mean ao re-feet October ...... 42.9 2.0 l.J 1.38 85 November ...... 33.0 1.1 65 December ...... 31.0 - - 1.0 61 Calendar year 1943 ...... 1,394.9 34 3.82 2,760 January...... 27.9 .9 55 February...... 23.2 _ _ . S 46 March...... 21.7 _ _ .7 43 April...... 23.2 .8 .77 46 May...... 448.4 48 .8 14.5 389 June ...... 604.4 45 8.4 20.1 1,200 July...... 130.4 S.O 2.3 4.21 259 August ...... v ...... 52.7 2.2 1.4 1.70 106 September...... 39.3 1.4 1.2 1.31 7e Water year 1943-44 ...... 1,478.1 48 - 4.04 2,930 * Winter discharge measurement nade'on this day. a No gage-height record; discharge computed on basis of 1 discharge measurement, weather records, records for Gooseberry Creek near Scofleld,and other stations on nearby streams, b Stage-discharge relation affected by ice. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 226 GREEN RIVER BASIN

Cottonwood Creek near Orangevllle, Utah

Location.- Water-stage recorder, lat. 39°15'55", long. 111 007'40", In SWi sec. 10, T. IB s., R. 7 E., 2 miles upstream from Grimes Wash and 5 miles northwest!* of Orangevllle. Drainage area.- 200 square miles. Records available.- May 1909 to September 1927 (fragmentary), May 1932 to September 1944. Average discharge.- 28 years (1910-20, 1921-27, 1932-44), 106 second-feet. Extremes.- faximum discharge during year, 1,140 second-feet June 13 (gage height, 5.15 reet); minimum recorded, 7.6 second-'feet Mar. 28, but may have been less during period of Ice effect. 1909-27, 1932-44: Maximum discharge, 2,870 second-feet Aug. 9, 1941 (gage height, 6.38 feet), from rating curve extended above 780 second-feet: minimum discharge observed, 4 second-feet Jan. 24, 1933 (discharge measurement), but may have been less during periods of ice effect. Remarks.- Records good except those for periods of ice effect or doubtful gage-height record, which are fair. Small diversions above station for irrigation. Ephralm and Spring City tunnels constructed by Bureau of Reclamation In 1936 and 1938, respective­ ly, and several small canals divert from headwaters of Cottonwood Creek to Great Basin for irrigation In San Pitch River Basin.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June* July Aug. Sept.

1 23 23 24 20 32 4S 922 435 62 35 2 23 23 24 22 33 40 S20 400 60 35 3 23 25 23 22 38 38 666 3S9 58 34 4 24 24 23 22 44 48 541 346 57 33 5 24 26 27 (*) 21 56 74 495 305 56 33 6 23 22 25 20 56 109 495 277 54 33 7 23 ' 19 21 19 54 US 517 252 52 32 8 23 24 21 19 43 135 560 229 52 32 9 23 28 24 *24 33 d200 766 212 55 32 10 22 »24 27 £4 40 d275 772 194 49 31 11 24 22 22 24 43 d350 841 178 48 30 12 24 21 21 24 41 d425 915 169 47 30 13 23 21 20 25 36 d500 954 154 46 30 14 23 21 20 23 34 d550 954 147 46 29 15 23 21 19 21 31 d600 908 140 52 29 ' 16 > 18 16 23 21 18 20 31 d600 799 129 49 29 17 22 21 18 24 31 d500 708 123 4S 29 18 31 22 IS 26 33 d400 702 115 56 30 19 38 21 19 24 31 346 702 115 45 29 20 24 21 20 24 37 324 714 115 42 2S 21 25 21 21 22 31 350 666 103 39 £8 22 26 27 21 22 31 425 600 9S 39 27 23 27 22 20 24 33 492 570 103 37 27 24 25 IS 19 24 3S 542 546 91 40 27 25 26 21 20 21 36 627 634 81 41 27 26 26 IS 19 21 36 660 690 7S 37 26 27 26 19 17 21 39 66C/ 560 74 37 2e 28 27 23 *15 18 40 694 513 72 36 27 29 26 21 16 21 44 860 ,490 68 35 27 30 26 21 16 _ 27 46 944 482 67 35 27 31 23 - 16 - 32 - - 958 - 63 36 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 769 ( 3S 22 "24.8 1,530 November...... 660 2S IE 22.0 1,310 December ...... 634 27 IE 20.5 1,260 Calendar year 1943 ...... 26,453 464 _ 72.5 52,480

January...... 496 16 984 February . . 522 _ _ 18 1,040 March...... 701 32 IE 22.6 1,390 April ...... 1,156 . 56 31 38.5 2,290 May...... 12 r S9 2 958 36 416 25,570 June ...... 20,502 954 48£ 683 40,670 July...... 5,322 435 63 172 10i560 August ...... 1,446 62 35 46.6 2,870 September...... 897 . 35 27 29.9 1,780 Water year 1943-44 ...... 45,997 95S - ' 126 91,250 * Winter discharge measurement made on this day. d Doubtful gage-Height record; discharge computed on basis of records for Huntington Creek near Huntington. Mote.- Stage-discharge relation affected by ice Dec. 12-20, Dec. 24 to Mar. 8 (no gage-height record Jan. 5 to Feb. 4, Feb. 7 to Bar. 8); discharge computed on basis of weather records and records for Huntington Creek near Huntington. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. DIRTY DEVIL RIVER BASIN 227 (Formerly published as Fremont River Basin)

Fremont River below Fish Lake, near Fremont, Utah

Location.- Water-stage recorder, lat. 38°35'30", long. 111040'30", In NEi sec. 34, T. 25 S., R. 2 E., half a mile downstream from outlet gates of Fish Lake, Si miles north­ east of Twin Creeks ranger station, and 10 miles northwest ol Fremont. Drainage area.- 27 sqhare miles. Records available.- June 1939 to September 1944. Extremes (regulated).- Maximum dally discharge during year, 86 second-feet June 24; practically no now at times when gates are closed at outlet of Fish Lake. 1939-44: Maximum dally discharge, 90 second-feet June 29, 1941; practically no flow at times when gates are closed at outlet of Fish Lake. Remarks.- Records good except those for periods of no gage-height record, which are fair. KJLOW regulated by Fish Lake, half a mile above station. No diversion.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 3.2 69 82 1.7 2 3.0 66 ' 1418 1.6 3 2.8 66 1.4 4 3.0 66 14 al.4 5 3.2 65 12 al.3 6 2.8 - aO.2 68 10 al.3 7 2.8 60 a9.6 al.2 8 2.6 59 a9.3 al.8 9 2.6 56 a8. 9 al.l 10 2.8 52 a8.6 al.O 11 4.0 a50 aB.3 1.0 12 1.9 , a48 a7.9 .9 13 2.6 .2 a47 a7.6 1.0 14 2.6 .2 a46 a7.2~ 1.8 15 2.6 .2 a44 a6.9 1.1 . aO.8 aO.6 aO.4 aO.4 > aO.4 ao.4 > aO.5 16 2.4 .8 a42 a6.6 1.0 17 3.6 .2 a41 a6.2 1.4 18 4.0 .2 a40 a5.9 4.2 19 1 £.8 .2 a38 aS.5 7.6 20 .2* a36 a5. 2 6.8 21 .2 a3 5 a4.9 7.0 23 .2 a34 a4.5 6.0 23 44 a32 a4.2 5.7 24 86 a30 a3.8 5.5 25 > a2 83 a29 a3.5 5.3 26 84 a28 a3.2 5.3 27 80 26 a2.B 5.3 28 76 25 a2.5 5.3 29 74 25 a2.1 6.0 30 - 71 24 1.8 5.0 31 ~ - - 22 1.7 Second- tKanott in Month foot-days Maximum Minimum Mean ' acre-feet

October...... 79.3 4.0 2.56- 157 November...... 24.0 _ .8 48 December ...... 18.6 _ .6 37 Calendar year 1943 ...... 2,106.5 61 5 77 4,180 January...... 12.4 ~ ~ .4 25 Febru&ry 11.6 .4 cOrt« March...... 12.4 _ _ .4 25 April...... 12.0 _ _ .4 24 May...... 15.5 _ _ .5 31 June ...... 602.4 86 20.1 1,190 July...... 1,363 69 22 44.0 8,700 August ...... 2£8. 7 22 1.7 7.38 454 September...... 95.8 7.6 .9 3.19 190 Water year 1943-44 ...... 2,475.7 86 - 6.76 4,900 a No gage-height record; discharge computed on basis of field estimate of discharge Oct. 25 and record of gate changes at Pish Lake, except July 11-26, Aug. 7-29, Sept. 4-10, which were interpo­ lated, Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 228 DIRTY DEVIL RIVER BASIlt (Formerly published as Fremont River Basin)

Fremont River near Blcknell, Utah

Location.- Staff gage, lat. 38°18', long. 111°31', In NEi sec. 7, T. 29 3., R. 4-E., 500 feet upstream from highway bridge, 1,500 feet downstream from Torrey Canal and Kill dltclv, 1 mile downstream from Government Creek, and 3 miles southeast of Blcknell. Drainage area.- 776 square miles. Records avallable.- May 1909 to December 1912 (published as Fremont River near Thurber) ana October 1937 to September 1944. Extremes.- Maximum discharge during year not determined; minimum observed, 61 second-feet lug. 23, 25, 26, 30. 1909-12, 1937-44: Maximum discharge, 1,200 'second-feet about Apr. 5, 1942 (gage height, 5.8 feet, present site, from floodmarks), from rating curve extended above 700 second-feet; minimum observed, 18 second-feet June 2, 4, 13-15, 17, 18, 1912. Remarks.- Records poor. Records Include flow of Torrey Canal and Mill ditch and represent flow of Fremont River above these diversions. Discharge computed by combining flow In canals with that In river below canals. Gages read once dally except as noted. Several diversions above station for irrigation. Flow affected by Fish Lake and John­ son and Forsythe. Reservoirs.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 83 85 88 104 10O 110 126 _ 71 a70 64 2 se 86 83 104 100 106 _ 73 a70 63 3 34 96 39 - 92 106 1O7 _ 72 a70 70 4 84 87 89 94 102 110 _ 71 a70 71 5 83 88 91 112 96 114 - 72 tt70 68 6 86 88 89 90 a!09 118 _ 71 a70 69 1 87 aS8 91 92 117 125 _ 73 a70 71 8 85 89 96 94 114 132 106 73 a7O 72 9 85 88 98 98 101 12S _ 73 71 70 10 83 89 96 96 94 156 . - 70 70 71 11 84 89 95 95 9S 214 _ 73 70 71 12 85 a88 a94 90 104 222 _ 72 69 73 13 86 aSS a94 94 101 220 _ 70 69 72 14 87 a 88 a94 96 92 134 _ d70 69 71 15 87 89 a94 96 112 137 - 69 70 71 16 88 92 a93 112 102 160 _ 69 69 17 91 a92 a93 94 106 156 _ 1ft 94 92 a'92a93 117 a!04 178 _ 19 93 91 allO alOO 197 _ 20 93 a87 a92 alOS 96 120 - 68 71 71 96' 21 SO 83 a92 100 134 _ 70 63 72 22 82 84 a92 10O 107 130 _ 72 62 71 23 79 63 a91 100 101 a 120 - 72 61 71 24 eo 81 a91 96 104 117 . 67 71 62 72 25 81 87 a90 102 109 117 136 69 61 70 26 79 S4 9O alOO 96 127 _ 71 61 76 27 |° 85 S9 93 102 114 .. 67 66 76 28 3t> S2 90 alO2 106 a!20 - 70 66 72 29 86 82 92 107 106 a 120 - 71 65 30 83 85 94 a!04 _ a 120 . B70 61 70 31 80 - 92 101 - a 122 - - a70 63 Seoond- Runoff in Month foot-days Maxima Minima Mean acre-feet

December...... 2,852 98 88 92 5,660 Calendar year 1943 ...... 29,300 300 49 SO. 3 53,120 3,089 117 90 99.6 6,130 March...... 222 106 _ _ _ May...... July...... 2,190 73 67 70.6 4,340 2,094 73 61 67.5 4,150 September...... 2,126 76 63 70.9 4,220 Hater year ...... - - - - - a Ho gage-height record; discharge Interpolated. d Doubtful gage-height record; discharge Interpolated. time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 229

San Juan River near Pagosa Springs, Colo.

Location.- Water-stage recorder, lat. 37°22'05% long. 106°53'40", in SEi sec. 12, T. 36 N-, R. 1 W., a quarter of a mile, upstream from private highway bridge, hair a mile'up­ stream from West Fork, and 9.5 miles northeast of Pagosa Springs. Datum of gage Is 7,597.63 feet above mean sea level, datum of 1929. Drainage area.- 86.9 square miles. t Records available.- May 1935 to September 1944. Extremes.- Maximum discharge during year, 1,410 second-feet May 16 (gage height, 3.84 reet); minimum dally, 9 second-feet Feb. 11. 1935-44: Maximum discharge, 2,070 second-feet May 12, 1941 (gage height, 4.84 feet), from rating curve extended above 1,300 second-feet: minimum dally, 5.5 second-feet Dec. 20, 1939. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good except those for periods of Ice effect or no gage-height record, wnicn are fair. Diversions above station for Irrigation.

Discharge, in second- feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jaq. Feb. Mar. Apr. May June July Aug. Sept.

1 22 26 16 14 15 20 3S 162 86S 400 59 27 2 22 22 17 alS 12 16 38 186 916 373 57 25 3 22 24 14 , a!6 13 15 57 198 766 337 55 24 4 21 25 15 a!5 12 15 114 186 556 346 51 23 5 19 24 15 a!4 13 12 1S2 £36 470 425 50 23 6 19 23 16 a!7 12 24 206 460 520 435 52 23 7 IS 22 16 a!7 14 SO 246 574 616 355 47 23 8 19 24 15 a!5 14 17 230 622 730 328 48 22 9 18 2S 14 alS 14 17 214 634 808 337 75 21 10 17 26 13 *17 13 20 136 664 844 294 57 20 11 18 IS 13 14 9 21 12S 6SS 832 246 52 20 12 34 18 13 14 11 24 178 808 706 214 51 19 13 23 17 14 14 10 *2Q 178 964 670 206 44 18 14 20 16 15 14 11 IS 121 1,120 736 194 39 18 15 19 16 14 14 13 21 88 1,180 778 182 38 19 16 18 16 12 14 16 34 86 1,140 760 162 36 eo 17 18 16 14 12 14 27 71 922 682 154 35 18 18 17 16 15 14 14 24 62 634 676 143 37 18 19 31 16 16 14 16 24 57 580 676 166 54 18 20 25 16 16 14 16 22 56 646 664 206 50 17 21 24 16 16 16 15 21 51 766 760 178 48 16 22 24 16 15 16 14 21 45 862 730 143 39 18 23 24 20 14 16 15 20 55 892 658 139 37 17 24 21 19 13 13 15 oo 111 1,080 628 132 46 19 25 22 18 12 12 15 23 125 940 62S 118 47 20 26 22 19 15 16 14 22 114 736 598 101 39 26 27 22 15 16 16 14 21 IBS 634 562 92 34 24 28 26 15 14 18 14 E3 198 658 505 80 33 22 29 57 15 13 16 16 24 154 802 480 78 31 23 30 43 16 15 14 _ 27 139 880 475 73 30 20 31 33 - 13 12 - 37 850 67 2S Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 737 57 n 23. S l,46tt November...... 573 28 15 19.3 1,150 December ...... 449 17 12 14.5 891 Calendar year 1943 ...... 35,925 53 S _ 9S.4 71,260 January 45S 18 1£ 14 8 908 February...... 394 16 9 is!e 781 March...... 672 37 1£ 21.7 1,330 April...... 3,659 246 3E 12E 7,260 May...... 21,724 1,180 16 £ 701 43,090 June ...... 20,328 916 470 678 40,320 July...... 6,704 435 67 216 19,300 August...... 1,399 75 2E 45.1 2,770 September...... 621 27 16 20.7 1,230 Water year 1943-44 ..;...... 57,723 1,180 9 153 - 114,500 * Winter discharge measurement Bade on this day. a Ho gage-height record; discharge computed on basis of weather records and records for stations on nearby streams. Note.- Stage-discharge relation affected by Ice Hov. 28 to Jan. 1, Jan. 11, Feb. 11-15. Time basis; Mountain mar time. To convert mar time to standard time, subtract 1 hour. 230 SAN JUAN RIVER BASIN

San Juan River at Pagosa Springs, Colo.

Location.- Water-stage recorder, lat. 37°15'55", long. 107°00'40", in Si sec. 13, T. 35 N., R. 2 W., under lower highway bridge at town of Pagosa Springs. Datum of gage is 7,052.04 feet above mean sea level, datum of 1929. Drainage area.- 298 square miles. Records available.- January 1911 to November 1914, May 1935 to September 1944. Extremes.- Maximum discharge during year, 4,540 second-feet May 16 (gage height, 7.17 feet); minimum daily, 36 second-feet Dec. 25. 1911-14, 1935-44: Maximum discharge, 5,790 second-feet my 13, 1941 (gage height, 7.92 feet), from rating curve extended above 4,500 second-feet; minimum daily, 22 second-feet Dec. 19, 1938. Maximum stage known, 17.S feet Oct. 5, 1911 (discharge, about 25,000 second-feet). Remarks.- Records good. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 62 73 46 40 55 50 156 505 3,350 1,310 149 61 2 60 66 56 40 53 56 171 547 3,140 1,330 141 60 3 62 77 39 48 48 59 256 547 2,500 1,260 135 59 4 58 77 46 43 51 53 389 555 1,770 1,190 127 58 5 55 75 52 37 55 49 520 720 1,440 1,270 121 58 6 55 71 56 46 51 42 600 1,080 1,530 1,260 127 58 7 52 50 56 46 52 44 696 1,340 1,770 1,100 116 58 8 53 50 51 41 59 48 642 1,390 2,050 972 111 59 9 51 62 48 44 60 52 62S 1,420 2,690 906 146 56 10 50 63 49 46 56 58 468 1,500 3,230 834 . 133, 54 11 50 56 49 48 50 62 468 1,420 3,230 740 124 55 12 70 56 46 45 50 71 585 1,590 2,660 655 121 53 13 60 53 58 43 60 65 637 2,140 2,520 585 103 52 14 55 52 55 44 46 63 501 2,860 2,540 530 89 51 15 55 51 51 45 53 52 379 3,640 2,580 468 85 52 16 55 51 41 46 53 58 372 3,510 2,460 425 83 56 17 52 51 42 45 53 70 303 2,740 2,220 406 80 53 18 50 52 48 45 50 86 288 1,600 2,090 395 80 55 19 63 51 56 45 47 73 300 1,360 2,160 398 114 52 20 70 51 56 46 46 71 288 1,610 2,310 632 108 50 21 65 50 51 48 52 66 281 1,860 2,630 456 108 49 22 66 53 52 49 47 59 249 2,120 2,540 379 89 49 23 65 63 52 50 46 66 292 2,690 2,260 338 83 50 24 62 63 48 49 50 79 452 3,210 2,200 326 91 52 25 62 60 36 43 48 79 480 3,010 2,150 307 103 56 26 66 62 49 48 47 73 433 2,540 ,990 263 91 68 27 66 43 49 53 51 71 564 2,130 ,830 238 80 70 28 71 43 41 53 51 70 624 2,000 ,590 213 73 70 29 120 44 39 52 47 73 543 2,740 ,470 195 70 75 30 111 44 48 52 102 464 3,130 ,440 178 68 72 31 91 - 37 51 - 138 - 3,140 - 168 65 -

Second- Runoff in Month foot-day s Maximum Minimum Mean acre feet

October ...... 1,983 120 50 64.0 3,930 November ...... 1,713 77 43 57.1 3,400 December ...... 1,503 58 36 48.5 2,980 Calendar year 1943 ...... 113,365 1,920 36 311 224,900 January...... 1,431 53 37 46.2 2,840 February...... 1,487 60 46 51.3 2,950 arch...... 2,058 138 42 66.4 4,080 April.. ..:...... 13,029 696 156 434 25,840 Bay...... 60,694 3,640 505 1,958 120,400 June ...... 68,540 3,350 1,440 2 'ese285 135,900 July...... 19,727 1,330 168 39,130 August ...... 3,214 149 65 104 6,370 September...... 1,721 75 49 57.4 3,410 Water year 1943-44 ...... 177,100 3,640 36 484 351,200 Time basis; Mountain war time. To convert war time to standard time, subtract 1 hou SAN JUAN RIVER BASIN 231

San Juan River at Rosa, N. Hex.

Location.- Water-stage recorder, lat. 37°00'20", long. 107°24'10", in sec.'20, T. 32 N., ~*R* 5 W., 75 feet upstream from highway bridge, a quarter of a mile downstream from Piedra River, and 1 mile north of Rosa. , Drainage area.- 1,990 square miles. Records available.- October 1930 to September 1944 in reports of Geological Survey. September 1920 to December 1931 in reports of State engineer. Average discharge.- 24 years (1920-44), 1,240 second-feet. Extremes.- Fkximum discharge during year, 9,080 second-feet May 15 (gage height, 6.86 feet); minimum daily, 105 second-feet Sept. 23. 1930-44: mximura discharge, 17,200 second-feet Apr. 23, 1942 (gage height, 8.50 feet), from rating curve extended above 11,000 second-feet by logarithmic plotting; minimum daily, 70 second-feet (estimated) Dec. 1, 2, 1934. Ifeximum flood known occurred Oct. 5, 1911. Remarks.- Records good except those for periods of ice effect or no gage-height .record, which are fair. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 233 295 178 b!50 b!70 199 1,210 2,380 6,480 3,120 a460 187 2 219 261 193 b!60 blSO »233 1,180 2,520 6,480 3,040 a 420 178 3 240 247 175 *b!65 *b!70 295 1,400 2,320 5,780 2,810 a390 178 4 230 264 »142 b!60 blSO 315 1,940 2,000 4,720 2,810 a360 160 5 216 268 1)170 b!40 b!90 283 2,520 2,450 3,370 3,040 334 157 6 212 268 193 b!60 bSOO 216 2,810 3,360 3,960 2,960 324 154 7 212 240 20S b!50 b!90 181 2,960 4,240 4,620 2,660 328 157 8 202 178 181 b!40 b200 1S1 2,660 4,520 5,020 2,380 303 148 9 206 190 196 b!30 208 199 2,740 4,420 5,560 2,850 346 145 10 193 230 190 b!50 b205 233 1,940 4,780 6,010 2,120 488 138 11 187 233 142 b!70 b!90 303 1,S80 4,780 6,010 al,900 374 128 12 216 226 138 blSO blSO 351 2,520 4,720 5,780 al,700 346 122 13 258 226 1)170 bl60 b!70 364 2,310 6,010 5,130 al,500 315 120 14 226 216 216 b!50 b!90 477 2,320 6,970 5,130 al,400 275 113 15 212 212 216 b!40 blSO 510 1,510 7,990 5,130 al,300 244 116 16 205 »205 190 b!45 b!95 342 1,480 7,470 5,130 al,200 230 122 17 199 202 *151 b!50 bl90 400 1,210 6,480 4,620 al,150 222 158 18 190 212 1)170 b!50 *178 583 1,070 4,620 4,520 al,100 236 130 19 212 212 1)200 b!55 b!72 472 1,230 3,870 4,620 al,100 272 128 20 287 208 226 b!55 b!70 450 1,520 4,330 4,920 al,700 387 120 21 254 202 219 b!60 x 178 396 1,500 4,720 5,130 1,240 369 111 22 236 205 199 *b!60 bl90 387 1,330 5,240 4,920 1,040 315 109 23 233 258 212 b!70 blTB 410 1,230 5,730 4,620 854 258 105 24 236 295 199 blSO 181 526 2,060 6,480 4,620 854 261 109 25 222 264 169 b!70 202 644 2,180 6,240 4,620 558 396 172 '392 26 226 240 1)175 b!60 196 5f>4 1,760 5,560 4,240 704 208 27 226 1)205 b!50 190 532 2,520 5,240 4,140 619 299 230 28 230 166 b!90 b!60 199 516 2,810 4,720 3,700 565 250 272 29 324 154 b!60 b!70 b200 510 3,040 5,730 3,360 532 222 226 30 440 D160 blSO b!70 _ 690 2,520 6,480 3,560 504 202 208 31 342 - b!50 b!60 - 1,050 - 6,480 - a 480 190 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

187 236 14,520 December ...... 5,703 226 138 184 11,310 Calendar year 1943 ...... 314,976 4,420 138 863 624,800

118,700 May......

September...... 4,577 272 105 153 9,080 Water year 1943-44 ...... 465,622 7,990 105 1,272 925,500 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of weather records and records for stations at Pagosa Springs and at Parmington. b Stage-diicharge relation affected by ice. Time basis'! Mountain war time. To convert war time to standard time, subtract 1 hour. 232 SAN JUAN RIVER BASIN

San Juan River near Blanco, N. Mex.

Location.- Water-stage recorder, lat. 36°43'50", long. 107°48'50B , in ME$ Sec. 18, T. 29 N., R. 9 W., half a mile upstream from highway bridge, 1 mile upstream from. Canyon Largo, and li miles east of Blanco. Drainage area.- 3,320 square miles. Records available.- December 1908 to October 1910 (gage heights only January to October 1910) and October 1930 to September 1944 in reports of Geological Survey. December 1908 to December 1909 and June 19S7 to December 1931 in reports of State engineer. Average discharge.- 16 years (1928-44), 1,578 second-feet. Extremes.- Maximum discharge during year, 11,800 second-feet nay 16 (gage height, 6.75 feet); minimum daily, 179 second-feet Jan. 5. 1930-44: Maximum discharge, 23,300 second-feet May 14, 1941 (gage height, 8.46 feet); minimum daily, 17 second-feet Aug. 18, 24, 25, 1939. Remarks.- Records good except those for periods of ice effect or no gage-height record, which are fair. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 411 575 324 227 b240 *230 1,920 2,630 6,460 4,260 a640 909 2 424 525 403 *224 *b270 262 1,470 2,680 3,460 4,040 a580 881 3 420 474 343 b250 b260 395 1,620 2,680 7,600 3,930 525 867 4 446 371 282 b240 b260 605 2,170 2,460 6,640 3,330 500 854 5 433 371 265 179 b270 525 2,690 2,530 5,480 3,830 480 834 6 420 363 . 304 b220 272 395 3,120^ 3,270 5, ISO 4,150 456 840 7 488 347 339 b200 2S2 321 3,220 4,160 5,790 3,730 470 821 8 428 307 343 b!90 286 286 2,990 4,640 6,460 3,280 456 765 9 415 262 332 b!80 321 310 2,910 4,640 7,010 2,880 470 8740 10 ' 415 290 343 b!90 314 367 2,460 4,900 7,600 2,740 609 a720 "592 11 403 324 307 b210 234 515 2,130 5,180 7,810 2,280 a 680 12 415 324 227 b230 248 756 2,570 5,180 7,600 2,040 510 a650 13 433 321 276 b200 b240 666 2,760 6,OSO 6,820 1,780 480 a620 14 456- 318 332 b!90 230 774 3,080 7,360 6,640 1,580 460 a 600 15 424 307 363 b!90 b240 1,070 2,070 9,900 6,640 1,440 438 a680 16 433 307 355 t.190 b250 762 1,620 10,400 6,820 1,360 376 598. 17 415 304 307 b200 *b260 644 1,520 10,200 6,460 1,230 376 576 IB 420 304 218 b200 b240 945 1,280 8,020 5,960 1,190 392 587 19 460 307 237 b210 b220 868 1,280 6,120 6,120 1,190 442 560 20 515 304 336 *b210 b210 750 1,620 6,120 6,120 1,430 535 535 21 570 304 351 b210 b210 644 1,720 6,640 6,460 1,880 560 480 22 515 265 363 b220 D220 545 1,670 7,200 . 6,290 1,530 560 456 23 492 293 347 t.240 b23C 680 1,380 7,010 5,960 1,310 490 438 24 487 433 347 b260 b240 702 1,870 8,960 5,960 1,230 465 470 25 487 375 324 b240 D280 987 2,320 8,960 6,960 1,270 465 545 26 482 321 272 b220 b270 822 2,130 7,810 5,640 1,230 576 675 27 478 296 275 bsio 248 720 2,410 7,200 5,640 1,150 520 747 28 492 372 324 b220 234 654 2,600 6,460 5,040 al.OOO S60 847 29 594 237 314 t.240 221 622 3,530 7,200 4,630 a900 944 735 30 804 286 230 b230 . 696 2,990 8,020 4,500 a800 965 717 31 672 - 244 b220 - 1,140 - 8,460 - a720 944 - Second- Runoff in Month foe t-days Maximum Minimum Mean acre-feet

804 November December...... 9,631 403 218 311 19,100 Calendar year 1943 ...... 381,953 5,460 149 1,046 757,600 -lamiftry , 179 214 13,170 February 210 14,480 March. 1,140 230 631 38,790 1,280 133,100 May...... 193,120 10,400 2,460 6,230 383,000 191,750 3.460 4,500 6,392 380,300 July...... 65,260 4,260 720 2,105 129,400 17,136 965 ' 376 553 33,990 September...... 20,327 909, 438 678 40,320 Water year 1943-44 ...... 622,676 10,400 179 1,701 1,235,000 * Winter discharge measurement mad» on this day. a Ho gage-height record; discharge computed on basis of records for stations at Rcsa and at Farmlngton. b Stage-discharge relation affected by ice. , Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN-JUAN RIVER BASIN 233

San Juan River at Farmington, N. Hex.

Location.- Water-stage recorder, lat. 36°43', long. 108°13', In SEi sec. 17, T. 29 N.» R. 13 W., 360 feet downstream from highway bridge, 4,000 feet downstream from Anlmas ' River, and 1 mile west of Farmlngton. Drainage area.- 6^580 square miles. N Records available.- June'1904 to September 1906, September 1912 to December 1914, and October 1930 to September 1944 In reports of Geological Survey. September 1912 to July 1918 and November 1921 to December 1931 In reports of State engineer. Average discharge.- 21 years (1922-25, 1926-44), 3,625 second-feet. Extremes.- Maximum discharge during year, 17,600 second-feet May 17 (gage height, 5.95 feet); minimum dally, 430 second-feet Jan. 9. 1930-44: rfexlmum discharge, 32,800 second-feet Sept. 28, 1935 (gage height, 8.0 feet, estimated), from rating curve extended above 18,000 second-feet; minimum dally, 27 second-feet Aug. 22, 1939. Remarks.- Records good. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 766 1,150 648 540 615 571 1,920 3,580 13,900 8,720 1,360 1,020 2 730 1,060 706 *b500 670 615 2,010 3,720 13,900 8,060 1,20Q 985 3 730 985 706 b540 648 748 2,010 3,850 13,000 7,350 1,080 959 4 754 881 604 b600 659 1,050 2,400 3,580 11,400 7,350 985 946 5 748 790 593 580 694 959 2,960 3,580 8,950 7,640 881 920 6 748 790 604 530 682 S16 3,450 4,420 3,280' 7,350 816 953 7 754 778 648 b490 718 686 3,990 5,720 9,180 7,230 881 907 S 71S 706 648 b460 670 510 4,130 6,640 10,400 6,450 790 894 ». 682 646 688 b430 730 510 3,850 6,830 11,100 5,720 S16 829 10 682 646 718 «450 766 5S8 3,720 7,230 12,500 5,380 985 816 1.1 682 71S 659 b480 593 790 2,350 8,060 13,300 4,690 1,060 790 12 694 750 571 b580 604 1,160 3,080 7,850 13,300 3,990 394 778 13 730 694 540 b470 637 1,160 3,560 8,950 12,200 3,450 816 754 14 766 688 686 b460 571 1,090 4,150 11,100 11,700 3,030 754 71S 15 754 682 694 b460 560 1,280 5,080 14,200 11,700 2,720 730 718 16 730 670 659 b470 615 1,880 2,500 16,600 11,700 2,550 626 778 17 637 659 686 b490 637 985 2,540 17,000 11,100 2,400 582 694 IS 730 659 520 b510 637 1)260 2,010 14,800 10,100 2,280 71S 694 19 754 659 510 *b520 571 1,440 1,900 11,100 10,400 2,220 742 694 20 881 659 637 *540 550 1,850 2,070 10,400 10,900 2,480 742 670 21 959 648 694 b580 550 1,160 2,360 10,600 11,700 3,580 790 648 22 933 637 750 615 550 985 2,320 11,400 11,700 2,960 790 593 23 , 881 ' 659 694 686 671 894 2,050 11,700 11,100 2,590 750 593 24 881 816 648 657 582 985 2,140 13,600 10,900 2,540 ,829 615 25 868 855 626 615 670 1,280 2,810 14,500 11.-100 2,520 778 342 26 S29 718 540 530 748 1,310 2,850 13,600 10,900 2,220 316 955 27 848 637 530 b500 670 1,090 2,720 12,500 10,900 1,940 803 1,050 2B 816 626 588 b550 626 985 3,200 11,700 10,100 1,800 766 2,270 29 985 571 595 b580 582 933 4,280 11,900 9,180 1,640 1,180 1,420 30 1,370 604 490 b560 _ 980 3,990 13,600 8,950 l,52rf .1,080 1,090 31 1,340 - »470 *540 - 1,390 - 14,200 - 1,450 1,060 - Seoond- Runoff in Month foct-days Maximum Minimum Mean acre-feet

December...... 19,196 730 470 619 38,070 Calendar year 1943 ...... 676,284 10,100 406 1,853 1,341,000

March...... Ifav 9,952 611,900

September...... 26,551 2,270 593 885 52,660 Water year 1945-44 ...... 1,043,199 17,000 430 2,850 2,069,000 * Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 0-45-16 234 SAN JUAN RIVER BASIJE

San Juan River at Ship Rock, N. Flex.

Location.- Water-stage recorder, lat. 36°47'35", long. 108°43'55", In SWi sec. 22, T. 30 N., R. 18 W., 3 miles northwest of Ship Rock and 6 miles downstream from Chaco River. Datum of gage Is 4,848.6 feet above mean sea level (from river-profile survey). Drainage area.- 12,800 square miles. Records available.- January to October 1911, October 1930 to September 1931, and October J.yi5a to septemoer 1944 In reports of Geological Survey. January to October 1911 and November 1915 to December 1931 In reports of State engineer. Average discharge.- 24 years (1916-20, 1921-25, 1927-31, 1932-44), 2,898 second-feet. Extremes.- Maximum discharge during year, 18,500 second-feet May 17 (gage height, 8.36 reet;; minimum daily, 360 second-feet Jan. 10. 1930-31, 1932-44: Maximum discharge, 44,200 second-feet Sept. 28, 1935, from rating curve extended above 20,000 second-feet by logarithmic plotting; maximum gage height, 10.30 feet Oct. 14, 1941; minimum daily discharge, 8 second-feet Aug. 25, 26, 1939. A stage of about 6.5 feet, site and datum then In use, occurred Aug. 11, 1929 (discharge, about 80,000 second-feet). A greater discharge probably occurred Oct. 6, 1911, when a stage of 22.0 feet on old,gage (relation to present datum unknown) was recorded. Records of water analyses for the water year 1944 are given In Water Supply Paper 1022. Remarks.- Records fair. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to, September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 942 1,240 664 524 ' 650 602 1,750 4,000 14,300 8,520 1,380 1,010 2 830 1,110 63S 524 783 596 2,180 3,820 14,300 7,950 1,220 936 3 814 1,010 762 554 870 671 2,040 3,920 13,800 7,580 1,100 936 4 798 942 699 671 822 933 2,320 3,920 11,300 7,220' 972 909 5 830 830 644 611 769 1,150 2,860 3,580 . 9,530 7,22O 824 900 6 790 854 632 435 762 987 3,360 4,150 7,950 7,050 735 840 7 606 79 S 671 542 741 748 3,820 5,480 8,140 6,880 705 874 8 862 806 720 734 706 578 4,300 6,720 9,530 6,230 668 840 9 776 776 806 536 664 572 4,100 7,220 10,800 '5,620 66S 759 10 755 727 830 360 a720 578 4,000 7,580 12,000 5,330 840 743 11 762 762 734 410 a780 626 3,630 8,140 13,300 4,920 1,030 743 12 755 814 671 536 590 96O 3,450 7,950 13,800 4,530 981 728 13 79S 830 602 566 626 1,450 3,910 8,520 12,800 3,800 799 705 14 846 K50 650 542 602 1,250 'e4,400 10,400 11,500 3,430 705 690 15 862 822 720 a480 566 1,320 3,360 13,000 11,500 3,070 653 728 16 846 806 741 a490 614 1,580 3,020 16,000 11,500 2,780 618 743 17 830 790 699 500 596 1,060 2,700 16,600 11,500 2,690 570 743 18 783 806 626 542 620 978 2,250 16,600 10,200 2,430 551 690 19 762 798 518 566 608 1,550 2,040 12,000 10,200 2,340 1,020 698 20 86 B 798 572 590 536 1,290 2,110 10,200 10,800 3,140 775 675 21 978 776 713 60S 566 1,180 2,620 10,400 11,500 3,480 759 653 22 1,000 776 762 608 590 1,030 2,620 11,100 12,000 3,690 759 660 23 951 776 832 632 554 83S 2,550 11,800 11,500 3,070 712 a640 24 933 846 713 720 620 870 2,320 12,800 10,300 2,600 646 a630 25 924 1,020 699 720 638 1,050 2,780 14,900' 11,300 2,340 775 869 26 S62 906 678 671 755 1,520 3,020 13,800 11,100 2,340 775 1,800 27 870 776 590 470 755 1,210 3,020 12 , 800 10,400 2,100 824 1,640 28 82B 727 608 54S 713 1,030 3,450 12,000 10,400 1,840 743 2,240 29 924 706 67S 67S 626 924 4,200 11,500 9,320 1,670 954 3,730 30 1,220 671 671 713 906 4,300 13,300 8,720 1,570 1,050 1,750 31 1,430 - 57B 657 - 1,030 14,300 1,440 1,050 Second- Runoff in Month foci t-days Maximum Minimum Mean acre-feet

October ...... 27,223 1,430 75£ 878 51,000 November ...... 25,129 1,240 671 838 49,840 December ...... 21,115 832 51E 681 41,880 Calendar year 1943 ...... 685,082 10,100 C7C 1,877 1,359,000 January ...... 17,741 734 360 572 35,190 Febpjary...... 19,442 870 536 670 38,560 March...... 31,067 1,580 572 1,002 61,620 April ...... 92,430 4,400 1,750 3,083 183,400 May...... 308,500 16,600 3,580 9.95S 611,900 June ...... 336,090 14,300 7,950 11,200 666,600 Juiy...... 128,910 8,520 1,440 4,158 255,700 August ...... 25,911 1,380 551 836 51,390 September ...... 30,502 3,730 630 1,017 60,500 Water year 1943-44 ...... 1,064,110 16,600 360 2,907 2,111,000 a No gage height record; discharge computed on basis of records for stations at Parmington, N. Max., and near Bluff, Utah. e Indefinite stage-discharge relation; discharge computed on basis of records for stations Farmington, N. Hex., and near Bluff, Utah. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 235

San Juan River near Bluff, Utah

Location.- Water-stage recorder, lat. 37°09', long. 109°52', in SW-j? sec. 7, T. 42 S., ft. 19 b'., 1,600 feet downstream from Gypsum Creek, 1,800 feet upstream from bridge, and 20 miles southwest of Bluff. Altitude of gage, 4,050 feet (from river-profile map). Drainage area.- 23,000 square miles (revised). Records available.- October 1914 to September 1917, March 1927 to September 1944. Kecoras or monthly discharge prior to October 1938 have been republished, with some revisions and additions, in Water-supply Paper 918. Average discharge.- 20 years (1914-17, 1927-44), 3,017 second-feet. Extremes.- Maximum discharge during year, 18,800 second-feet May 17 (gage height, 14.80 reetj; minimum, 108 second-feet Jan. 9). 1914-17, 1927-44: Maximum discharge, 70,000 second-feet Sept. 10, 1927 (gage height, 32.0 feet), from rating curve extended above 30,000 second-feet: no flow July 3-13, 1934, Aug. 24-27, 29, 1939. Flood of Oct. 6, 1911, which is greatest known at Shiprock, N.'Mex., probably exceeded that of Sept. 10, 1927, at this station, but stage was not accurately determined. Remarks.- Records good. Diversions above station for irrigation. No diversion between station and mouth of river.. Records of water analyses and sediment loads for the water year 1944 are given in Water-Supply Paper 1022.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

I 1,050 1,570 S10 719 957 712 1,250 5,190 14,600 9,010 1,540 985 2 999 al,400 771 598 1,060 712 1,900 4,480 14 , 600 6,970 1,490 1,030 3 922 , 1,370 817 570 1,070 700 2,650 4.29O 14,1OO 3,350 1,340 971 4 873 1,200 831 564 1,080 784 2,650 4,350 13,600 7,740 1,210 957 5 852 1,160 810 632 1,130 922 2,730 4.0OO 11,800 7,840 1,100 9SO 6 859 1,O80 752 680 1,030 1,16O 3,650 3,750 9,500 7,650 957 943 7 S17 1.O10 790 564 992 1,100 4,460 4,480 8,350 7,880 804 985 8 804 1,010 732 409 1,010 943 4,670 6,350 9,1£0 7,190 771 943 9 845 999 852 248 957 778 5,020 7,860 10,300 6,460 817 373 10 894 S87 1,170 264 936 700 4,750 8,750 11,400 5,770 752 866 11 831 845 1,060 463 901 632 4,290 9,550 13,200 5,540 804 784 12 860 831 95O 373 922 674 3,62O 9,740 14,300 5,040 908 745 13 950 S87 894 284 797 1,170 3,660 9,520 14,300 4,430 1,060 764 14 880 901 873 309 6S6 1,880 4,290 10,200 12,800 3,710 908 719 15 90S S87 756 436 726 1,860 5,120 12,500 12,100 3,410 804 700 16 957 873 83S 386 662 1,640 4,080 15,200 12,000 3,100 758 674 17 922 866 859 414 609 1,900 3,120 17,200 12,200 2,800 700 732 18 90S 817 852 347 817 1,530 2,960 13,100 12,100 2,590 842 732 19 922 S52 817 396 693 1,410 2,560 15,000 10,900 2,520 2,040 732 20 936 831 738 592 668 1,700 2,220 11,400 10,700 3,740 1,430 712 21 971 852 656 732 656 1,900 2,400 10,400 11,300 3,480 1,010 706 22 1,030 971 752 719 662 1,580 2,930 10,900 12,100 3,640 936 6S6 23 1,060 1,080 887 817 632 1,320 2,930 11,800 12,200 3,530 784 686 24 1,040 S52 936 1,030 674 1,180 2,940 12,400 11,500 3,150 831 674 25 992 866 943 1,080 83S 1,120 2,730 14,100 11,200 2,640 726 662 26 1,030 957 S94 943 817 1,260 3,330 14,500 11,600 2,470 719 674 27 936 1,060 SS7 1,010 880 1,720 3,650 14,000 11,400 2,460 859 1,750 28 S80 964 771 824 943 1,510 3,200 12,900 11,400 2,220 999 3,160 29 950 ' 83S 700 680 866 1,330 4,000 12,300 10,400 1,950 9O8 3,440 30 1,180 778 .693 810 1,220 4,990 12,900 9,590 1,780 764 4,180 31 1,330 - 674 936 - 1,160 14,700 1,600 1,180 - Second- Runoff in Month f cot-days Maximum Minimum Mean acre- feet

October...... 29,408 1,330 804 949 56,330 November ...... 29,494 1,570 77S 983 58,500 December ...... 25,767 1,170 656 831 51,110 Calendar year 1943 ...... 753,032 10,400 246 2,063 1,494,000 January ...... 13,831 1,080 24S 607 37,350 February...... 24,671 1,130 609 851 48,930 March...... 38, 207 1,900 632 1,232 75,780 April ...... 102,750 5,120 1,250 3,425 203,800 May...... '...... 322,810 18,100 3,750 10,410 640,300 June ...... 355,190 14 , 600 8,350 11,840 704,500 July...... 142,710 9,010 1,600 4,604 283,100 August ...... 30,751 2,040 700 992 60,990 Septsmbsr...... 33,415 4,180 662 1,114 66,280 Water year 1943-44 ...... 1,154,004 18,100 248 3,153 2,289,000 No gage-height record; discharge Interpolated. Time baala; Mountain war time. To convert war time standard time, subtract 1 hour 236 SAN JUAN RIVER BASIN

West Fork San Juan River above Borns Lake, near Pagosa Springs, Colo.

Location.- Water-stage recorder, lat. 37°29'00", long. 106°55'45", In sec. 36. T. 38 N., K. i W., half a mile dovmstream from Beaver Creek, 1$ miles upstream from Borns Lake, and 16 miles northeast of Pagosa Springs. Correction.- Datum of gage published In Water-Supply Paper 979 was erroneous. Figure given was that for station near Pagosa Springs. Drainage area.- 41.2^ square miles. Records available.- April 1937 to September 1944. Extremes.- Maximum discharge during year, 825 second-feet June 10 (gage height, 4.35 reet;, from rating curve extended above 525 second-feet; minimum dally, 9.8 second- feet Jan. 30. 1937-44: Maximum discharge, 1,100 second-feet June 3, 1938, from rating curve extended above 600 second-feet; maximum gage height, 4.87 feet June 23, 1941; minimum discharge not determined. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records excellent except those for Oct. 1 to Apr. 30, which are fair. No dl- version or regulation.

Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 21 IS 21 15 10 13 15 26 660 422 54 IS 2 20 20 20 15 10 13 17 31 5S5 41S 51 18 3 19 22 IS 15 11 13 20 30 442 394 49 17 4 17 22 20 14 11 13 26 38 350 378 46 17 5 17 22 20 15 12 13 31 72 329 394 48 17 17 19 18 14 12 13 37 112 398 366 46 17 7 16 17 IS 14 12 13 42 13S 474 312 42 17 16 19 17 14 12 13 38 164 538 268 41 16 15 18 17 14 12 13 37 188 650 222 54 16 10 15 IS 19 14 12 13 30 164 710 175 41 16 11 IS IS IS 14 12 13 27 150 690 166 40 15 12 20 18 19 14 12 14 32 210 615 154 37 15 13 16 IS 19 14 12 14 37 294 590 14S 34 15 14 17 18 IS 14 12 14 29 422 600 144 31 14 15 16 IS 17 14 12 14 23 454 610 134 31 15 16 15 18 17 14 12 14 22 438 565 122 29 15 17 15 IS 18 14 12 14 20 336 53S 122 29 15 18 14 18 IS 14 12 14 18 225 560 112 29 14 19 17 IS IS 14 12 14 18 212 625 159 34 14 20 17 17 18 14 12 14 IS 26S 665 188 34 14 21 IS IS 17 14 12 14 16 332 690 140 29 14 22 19 18 17 14 12 14 16 406 635 120 26 14 23 IS 18 16 14 12 14 20 482 605 108 24 14 24 18 20 16 12 12 14 31 518 605 104 26 16 25 18 IS 15 13 12 14 28 470 565 94 27 19 26 19 IS 16 13 12 13 31 414 580 84 24 22 27 19 19 16 12 12 13 38 382 530 76 22 26 28 22 21 16 11 12 13 32 434 474 71 21 27 29 32 21 16 10 12 13 31 534 462 66 20 23 30 24 22 15 9.S - 13 24 595 446 62 19 20 31 19 - 15 10 - 14 - 620 - 58 18 - Second- Runoff in Month fcot-days Maximum MinimuB Mean acre-feet October...... 564 32 14 18.2 1,120 November...... 567 22 17 18.9 1,120 December ...... 543 21 15 17.5 1,080 Calendar year 1943 ...... 26,749 445 _ 73.3 53,060 Januirv- - - ...... 416. S 15 9.8 13.4 827 Febr u&ry 342 12 10 11. S 678 Marc 41S 14 13 13.5 829 April ...... 804 42 15 26. S 1,590 May...... 9,159 620 26 295 IS, 170 June ...... 16,786 710 329 560 33,290 July...... 5,781 422 58 A86 11,470 August ...... 1,055 54 IS "34.0 2,09O September...... '...... 510 27 14 17.0 1,010 Rater year 1943-44 ...... 36,945. S 710 9.8 101 73,270 Note.- No gage-height record Feb. 3 to Apr. 14; discharge computed on basis of £ discharge meaaure- ments made at a point 3 miles downstream, weather records, and records for San Juan River at Pagosa Springs. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 237

West Fork San Juan River near Pagosa Springs, Colo.

Location.- Water-stage recorder, lat. 37°22'30", long. 106°53'45B , In NEi sec. 12, T. 36 N., R. 1 W., 30 feet downstreaa from highway bridge, 0.6 mile upstream from mouth, and 10 miles northeast of Pagosa Springs. Datum of gage Is 7,605.57 feet above mean sea level, datum of 1929. Drainage area.- 87.9 square miles. Records available.- April 1935 to September 1944. Extremes.- Maximum discharge during year, 1.680 second-feet June 21 (gage height, 5.00 reet;, from rating curve extended above 1,100 second-feet; minimum dally, 22 second- feet Jan. 8, Sept. 14. 1935-44: Maximum discharge, 2,300 second-feet June 23, 1941 (gage height, 5.83 feet), from rating curve extended above 1,300 second-feet; minimum dally, 10 second- feet Dec; 19, 1937. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good Apr. 1 to July 20 and fair remainder of year. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 38 *33 31 25 34 32 33 115 1,360 696 S9 30 ?, 37 34 30 26 ' 3234 34 36 126 1,300 732 84 30 3 36 37 27 2S 36 48 124 1,020 674 81 26 4 32 35 30 26 34 35 76 136 741 62S 74 23 5 31 34 33 24 §6 32 116 180 674 651 71 28 6 31 32 33 26 34 28 126 283 759 623 76 26 7 31 30 32 27 33 29 143 371 916 547 67 26 B 30 - 31 30 22 36 31 148 415 1,070 487 - 64 27 9 30 32 29 23 37 32 136 433 1,300 447 34 27 10 30 30 29 *25 35 34 113 503 1,400 403 67 27 11 30 30 28 25 »33 36 116 479 1,380 355 61 25 1?, 37 29 33 25 34 38 128 559 1,260 323 61 26 13 31 29 35 24 37 »32 130 741 1,160 895 52 £4 14 31 23 34 25 38 27 102 1,020 1,200 271 46 22 15 30 23 30 26 34 25 82 1,240 1,200 243 47 24 1,6 30 29 26 27 35 28 81 1,210 1,140 209 47 24 17 29 29 23 27 34 33 71 934 1,060 260 47 24 28 29 32 27 32 36 *70 664 1,050 188 47 23 19 36 29 35 27 31 35 63 579 1,160 847 55 23 20 34 30 34 23 33 34 65 620 1,230 307 53 23 Bl 33 31 33 29 30 32 61 786 1,340 212 52 23 28 33 34 33 30 31 30 58 894 1,280 183 43 23 ?7> 32 37 30 31 32 33 74 1,110 1,160 172 40 23 30 37 27 30 33 36 106 1,160 1,160 170 43 26 25 31 37 27 29 30 34 109 1,070 1,100 154 45 30 32 32 30 32 32 32 109 993 1,060 138 43 34 32 27 32 33 33 31 136 894 988 128 40 40 28 35 27 30 33 32 31 140 921 836 118 37 45 49 27 26 33 30 31 118 1,170 790 109 34 41 W) 44 29 30 34 34 109 1,290 764 104 32 35 31 37 - 25 35 - 34 ~ 1,310 - 97 30 " Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 28 Hovenber...... 936 37 27 1,860 December...... 942 35 25 30.4 1,370 Calendar year 1943 ...... 50,164 758 18 137 99,500 862 35 22 27.8 1,710 963 37 30 33.2 1,910 March 1,005 33 25 32.4 1,990 April...... 2,913 148 33 97.1 5,780 Hay...... £2,430 1,310 115 724 44,490 32,853 1,400 674 1,095 65,170 10,127 732 97 327 20,090 1,714 89 30 55.3 3,400 September...... 838 45 22 27.9 1,660 Water year 1943-44 ...... 76,620 1,400 22 209 152,000 * Winter discharge measurement made on this day. Note.- No gage-height record Oct. 7-11, 16-13, Nov. 12-30, Aug. 22 to Sept. 30; discharge computed on basis of 1 discharge measurement, weather records, and records for stations on nearby streams. Stage-discharge relation affected by ice Dec. 29 to Jan. 15. No gage-height record Dec. 1-28, Jan. 16 to Har. 29 (stage-discharge relation probably affected by Ice during entire period); discharge computed on basis of 2 discharge measurements, weather records, and records for stations on nearby atrffama. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 238 SAN JUAN RIVER BASIN

Turkey Creek near Pagosa Springs, Colo.

Location.- Water-stage recorder, lat. 37022'15", long. 106°56'45", at west side of'see. 10, T. 36 N., R. 1 W., 2i miles upstream from mouth and 8 miles northeast of Pagosa Springs. Drainage area.- 23.0 square miles. Records available.- May 1937 to September 1944. Extremes.- Maximum discharge during year. 452 second-feet May 14 (gage height, 2.97 fe.et); minimum daily, 0.1 second-foot Sept. 21, 23. 1937-44: Maximum discharge, 860 second-feet May 12, 1941 (gage height, 3.73 feet), from rating curve extended above 550 second-feet: minimum daily, that of Sept. 21, 25, 1944. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good above 10 second-feet and fair below. A large part of flow diverted rrom drainage basin above station during irrigation season.

Discharge, in second-feet, water.year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 5.6 *11 7.2 4.3 6.0 6.2 15 40 246 114 11 1.3 ?, 6.S 12 7.3 4.6 5.8 6.6 17 45 230 117 11 .9 3 7.5 12 5.8 5.0 6.0 7.0 22 4S 17S 109 11 .9 4 1.2 11 6.2 4.7 6.2 6.4 35 56 127 102 9.8 .7 5 1.0 11 6.4 4.4 6.4 6.0 44 72 114 107 9.4 .7 6 1.0 10 6.6 4.9 6.2 ' 5.4 51 101 122 9S 9.4 .8 7 1.0 8.8 6.4 4.7 6.2 5.8 57 125 136 84 9.0 .7 R .9 3.2 6.0 4.5 6.8 6.2 55 132 164 7S S.6 .S 9 .7 9.2 5.7 4.8 7.0 6.6 51 166 212 72 14 .5 10 .6 9.S 5.6 5.0 6.0 7.0 41 160 230 66 11 .4 11 .6 9.4 5.2 5.0 5.3 7.6 44 137 216 57 9.4 .2 1.2 9.2 5.3 4.9 6.2 e.o 54 175 220 50 9.0 .2 13 2.3 S.2 6.5 «4.6- 7.R 7.S 50 233 198 46 S.O .3 14 5.6 6.5 S.2 4.6 5.2 7.5 40 324 192 42 7.2 .2 15 6.6 S.5 7.1 4.6 »V.S 6.8 35 324 223 36 7.2 .5 6.6 6.5 6.3 4.9 6.3 7.4 34 306 209 33 7.2 .5 3.7 S.5 4.S 4. a 6.0 8.6 31 219 195 34 7.3 .3 i a .8 s.e 5.6 4.9 5.S 9.S 28 13S 164 32 6.9 .3 3.7 S.2 6.0 5.0 6.0 9.0 ' »24 122 202 36 10 .3 20 5.3 *e.2 6.0 5.2 6.2 S.2 23 140 212 45 9.4 .2 6.8 S.5 6.3 5.3 5.S 7.6 22 166 216 37 8.6 .1 7.5 7.e 6.0 5.4 5.6 7.2 21 202 202 31 7.2 .2 23 8.2 6.S 5.S 5.4 5.8 S.2 27 248 les 25 6,6 .1 7.1 11 5.8 5.2 6.0 9.0 37 260 192 25 7.2 .4 25 8.2 11 5.3 5.0 5.6 8.6 36 256 178 22 8.3 .8 Zfi 7.6 8.5 6.3 5.4 5.8 S.O 43 220 167 21 6.6 2.0 ?7 7.8 7.0 6.0 5.6 6.0 7.8 49 195 151 17 5.5 1.8 ?K 8.5 6.5 5.0 5.6 6.0 3.2 50 184 133 15 5.2 2.S 29 14 6.5 5.6 5.6 5.8 9,4 41 234 125 14 5.2 2.8 30 12 6.7 6.0 5.6 _ 11 33 246 122 13 5.2 1.4 31 11 - 4.3 S.8 - 13 ~ 242 ~ 12 4.2 ~ Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 162.1 14 0.6 5.23 322 269.0 12 6.5 S.97 534 December...... 187.6 8.2 4.3 6.05 372 Caleadar year 1943 ...... 11,108.9 219 .6 30.4 22,040 Japuarw. 155.6 5.8 4.3 5.02 309 Febr 176.9 7.8 5.2 6.10 351 Hare 241.9 13 5.4 7.80 480 1,115 57 15 37.2 2,210 May...... 5,568 324 40 180 11,040 5,484 246 114 183 10,880 July ...... 1,590 117 12 51.3 3,150 255.5 14 4.2 S.24 507 September...... 23.0 2.6 .1 .77 46 Water year 1943-44 ...... 15,228.6 324 .1 41.6 30,20O » Wint&r discharge measurement made on this day. Mote.- Stage-discharge relation affected by ice Nov. 7-11, 16, 17, 27-30, Dec. 1-.13, 17-19, Dec. 30 to Jan. 11. No gage-height record Jan. 12 to Apr. 3 (stage-discharge relation affected by ice during most of period); discharge computed on basis of 4 discharge measurements, weather records and records for San Juan River at Fagosa Springs. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 239

Rito Blanco near Pagosa Springs, Colo.

Location.- Water-stage recorder, lat. 37011'40", long. 106°54'20", in SWi sec. 12, T. 34 R. i w., at road crossing 600 feet upstream from Sheep Cabin Creek and 7f miles south­ east of Pagosa Springs. Drainage area.- 23.3 square miles. Records available.- May 1935 to September 1944. Extremes.- Maximum discharge during year, 290 second-feet my 14 (gage height, 2.90 reet;, from rating curve extended above 180 second-feet; no flow Sept. 14-32. 1935-44: Maximum discharge, 475 second-feet May 13, 1941 (gage height, 3.21 feet, site and datum then in use), from rating curve extended above 350 second-feet: no flow . at times in 1939, 1940, 1943-44. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records fair, except those for periods of ice effect or no gage-height record, wnicn are poor. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Dot. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 13 45 107 33 1.6 0.4 2 .3 2.1 1.2 1.2 1.3 1.6 17 45 91 27 1.6 .3 3 .4 2.S 1.0 1.2 1.2 1.6 22 42 84 20 1.2 .3 1.4 31 43 72 15 1.2 .3 5 .4 3.3 1.2 1.1 1.3 1.2 36 51 66 16 1.2 .2 t> 1.3 1.1 42 69 67 12 1.0 ..3 1,2 43 89 75 10 .S .2 8 .4 .9 1.2 1.2 1.3 1.2 40 39 91 8.1 2.6 .2 9 .4 .9 1.3 1.2 1.4 1.4 28 91 116 6.7 2.6 .2 10 33 107 89 5.4 2.6 .1 11 .5 1.4 1.0 1.2 1.4 1.9 a37 93 SO 4.5 2.1 .1 12 .9 1.0 »1.2 *1.4 1.9 a4o 125 69 3.9 1.6 .1 13 1.1 W 1.2 1.9 a34 16S 64 3.6 1.2 .1 14 .5 1.3 1.1 2.1 a28 215 64 3.0 1.0 0 15 .2 1.2 1.2 1.1 1.1 2.S a24 212 62 3.0 .9 0 16 .2 a2o 190 62 2.8 .9 0 17 .2 1.2 .9 1.1 1.0 5.7 16 162 59 2.8 .9 0 18 .2 1.1 1.0 1.2 1.0 2.5 16 114 54 2.6 1.0 0 19 .4 1.0 1.1 1.2 .9 2.? 15 95 53 2.6 5.1 0 20 .S .9 1.2 1.2 .9 5.1 14 100 55 3.3 3.0 0 21 .6 ».9 1.3 1.2 1.0 3.0 13 107 59 3.0 2.3 0 22 .5 .8 1.4 1.2 1.0 2.1 13 118 57 2.6 1.4 0 23 .6 1.2 1.2 1.2 1.0 2.5 20 135 51 2.1 1.2 .S 24 .5 1.7 1.2 1.2 1.0 3.6 38 142 51 3.3 3.9 .6 25 .6 1.4 1.1- 1.2 1.0 3.9 39 120 50 2.1 4.2 .5 26 .4 1.4 1.2 1.2 1.1 3.6 41 107 43 1.9 2.5 1.2 27 .3 .9 1.3 1.3 .9 3.9 50 93 43 1.7 1.9 .S 28 .3 .9 1.4 1.3 .9 5.1 55 88 36 1.7 1.2 .7 29 2.62.6' .9 1.3 1.3 1.0 6.0 47 100 34 1.7 1.0 .8 30 .9 1.2 1.3 8.4 45 102 35 1.7 .7 .5 31 1.4 1.1 1.3 11 102 1.7 .5 Second- Runoff in Montlj foot-days Maximum Minimum Mean acre-feet Ooto her...... 19.3 2.6 0.2 0.62 38 Hove 43.0 3.9 >8 1.43 85 Deoember...... 36.2 1.4 .9 1.17. 72 Calender year 1943 4,447.2 94 0 12.2 8,820 Janu ary 37.0 1.3 1.1 1.19 73 Febr 32.9 1.4 .9 1.13 65 Marc h...... 99.7 11 1.1 3.22 19S Aprl 910 55 > I3 30.3 1,800 May. 3,364 215 42 109 6,670 June 1,944 116 34 64.8 3,860 July 20S.8 33 1.7 6.74 414 Augu 54.9 5.1 .5 1.77 109 Sept 8.7 1.2 0 .29 17 Water.year 1943-44 ...... 6,758.5 215 0 18.5 13,400 * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of weather records and records for stations on nearby streams. Note.- Stage-discharge relation affected by Ice Nov. 28 to Dec. 21. No gage-height record Dec. 3-8, Dec. 22 to Feb. 11 (stage-discharge relation probably affected by Ice during most of period); dis­ charge computed on basis of 1 discharge measurement, weather records, and records for station on nearby streams. Time basis; Mountain war time. To convert war time to standard time1; subtract 1 hour. 240 SAN .JUAN RIVER BASIN

Navajo River at Banded Peak Ranch, near Chromo, Colo.

Location.- Water-stage recorder, lat. 37°05'00", long. 106°41'30", In NWi sec. 24, T. 33 N., K. 2 E., on Banded Peak Ranch, half a mile downstream from Aspen Creek and 9 miles northeast of Chromo. Drainage area.- 69.8 square miles. Records available.- April 1937 to September 1944 (no winter records 1943). Extremes.- Maximum discharge during year, 773 second-feet May 15 (gage height, 2.78 feet); minimum dally, 18 second-feet Dec. 25. 1937-44: Maximum discharge, 1,340 second-feet May 13, 1941 (gage height, 4.02 feet); minimum dally, 12 second-feet Dec. 28, 1939. Maximum flood known occurred Oct. 5, 1911.' Remarks.- Records good except those for periods of no gage-height record, which are poor. HO diversion or regulation above station.

Discharge, In second-feet, water year October 1943 to September 1944 Da, Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 33 36 26 21 27 25 31 116 655 365 65 41 33 34 23 22 26 26 34 116 620 340 62 -40 33 35 20 22 25 27 41 109 560 31S 61 36 4 32 32 21 21 25 26 43 116 440 328 56 36 5 31 32 24 20 26 25 66 154 405 435 58 36 6 30 29 26 21 05 25 110 246 435 360 61 36 30 26 26 22 25 25 130 322 495 295 56 36 31 25 26 21 26 26 130 322 535 254 54 36 9 30 27 25 22 25 27 110 30S 605 222 94 34 10 £9 2e 25 23 24 26 100 345 625 203 66 33 11 32 27 25 24 23 29 110 336 620 186 64 31 42 27 26 23 24 29 120 400 575 163 62 31 13 34 26 27 23 23 26 100 510 550 14S 55 31 14 32 26 25 23 SS 25 90 590 550 137 51 31 IS 31 27 23 23 23 24 85 660 545 121 43 38 16 31 26 21 23 23 26 82 640 560 111 46 - 31 17 30 27 22 23 23 29 73 565 530 lie 46 30 18 30 27 24 23 23 32 74 410 525 116 52 30 19 36 *2S 26 23 22 31 70 400 555 126 62 29 20 35 29 26 23 23 30 74 490 590 140 64 26 21 34 2S 25 23 23 26 72 530 600 145 64 26 22 34 29 26 24 23 28 72 560 565 116 54 23 23 33 30 23 23 23 30 84 620 550 116 51 29 24 31 31 20 23 24 32 96 660 555 107 70 30 25 31 27 16 23 23 31 67 640 520 96 70 31 26 31 29 20 23 24 29 94 600 510 91 59 33 27 32 26 23 24 24 29 114 575 470 83 51 32 28 35 25 22 25 24 29 140 540 435 78 48 36 29 46 24 20 25 25 30 111 620 415 75 46 32 30 44 25 22 26 _ 31 100 670 410 72 43 29 31 40 - 20 26 - 31 - 645 67 42 Seccnd- Runcff in Month fcct-days Maximum MininuB Mean acre-feet October...... f...... 1,040 December...... 726 27 ie 23.4 1,440 Calendar year ...... - - . _ - 711 26 22.9 696 27 869 32 24 April ...... 2,653 140 31 5,260 May...... 680 16,005 655 July...... 5,528 September...... 978 41 2E 32.6 1,940 Hater year 1943-44 ...... 45,676 680 ie 125 90,580 » Winter discharge measurement made on this day. M°te.- Ho gage-height record Oot. 27 to Hov; 1, Nov. 30 to Apr. 23 (stage-discharge relation affected by Ice during part of period); discharge computed on basis of 1 discharge measurement, weather records, and records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 241

Nava'jo River at Edith, Colo.

Location.- Water-stage recorder, lat. 37°00*10", long. I06°54'so", In NWi aec. 24, T. 32 N., R. 1 W., 340 feet downstream from highway bridge at- Colorado-New Mexico State line, a quarter of a mile east of Edith, and 1 mile upstream from Coyote Creek. Datum of gage Is 7,033.00 feet above mean sea level (Bureau of Reclamation bench mark). Drainage area.- 165 square miles. Records available.- September 1912 to December 1914 and June 1935 to September 1944 In reports or Geological Survey. September 1912 to December 1928 and June 1935 to Sep­ tember 1944 In reports of Colorado State engineer. September 1912 to December 1928 In reports of New Mexico State engineer. Average discharge.- 25 years, 187 second-feet. Extremes.- Maximum discharge during year, 956 second-feet May 15 (gage height, 4.54 feet); minimum dally, 20 second-feet Dec. 25. 1935-44: Maximum discharge, 2,840 second-feet Apr. 23, 1942 (gage height, 6.55 feet), from rating curve extended above 1,100 second-feet; minimum dally, 11 second- feet Feb. 4, 1943. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good except those for period of Ice effect, which are fair, Diversions above station for Irrigation.

Discharge, in second-feet,' water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr. May June July AUg. Sept.

1 38 47 28 22 31 30 109 248 715 460 66 47 2 56 43 29 23 29 32 115 260 729 420 63 49 36 44 21 24 27 35 148 242 701 390 63 48 4 36 43 24 23 29 34 212 212 608 390 62 47 36 43 27 21 30 32 24S 260 495 490 63 47 6 34 40 29 24 28 31 260 370 548 435 64 48 34 33 29 24 27 32 268 485 608 385 58 43 35 35 28 22 30 34 264 490 656 310 56 42 9 34 36 27 23 30 36 257 455 722 296 96 41 10 32 36 27 24 28 38 215 490 757 276 77 38 11 34 33 27 25 25 43 221 490 757 256 70 36 12 48 33 26 24 '2927 47 257 515 70S 214 69 35 13 42 34 31 23 44 268 660 656 187 63 33 14 39 33 29 23 23 42 221 726 626 166 58 33 15 38 31 27 24 25 36 182 860 614 146 57 35 16 38 30 23 25 25 41 179 785 620 125 54 35 17 38 31 24 25 25 47 146 70S 620 117 56 33 18 36 32 27 25 24 54 120 506 632 108 57 33 19 47 32 30 25 24 54 136 450 694 104 66 32 20 44 32 30 25 27 52 1S9 536 757 123 69 31 21 40 32 27 25 26 BO 129 566 813 143 72 30 22 42 33 26 26 26 47 126 596 771 121 60 31 23 43 36 28 26 27 48 141 662 736 114 57 33 24 40 36 24 26 28 56 224 743 736 114 63 41 25 40 32 20 24 28 57 218 729 701 110 83 42 26 39 32 25 26 27 54 182 656 626 100 66 42 27 39 26 26 29 29 51 254 620 590 88 58 41 28 42 26 24 29 28 50 304 560 554 83 54 47 29 60 26 22 29 28 52 288 656 506 79 50 44 30 57 26 25 29 _ 69 227 722 518 74 47 43 31 52 "- 21 29 - - 98 - 694 70 48 Second- Runoff in Moath foot-days MaxiauB Minimi* Mean acre-feet

1,249 60 32 40.3 2,480 1,026 47 26 34.2 2,040 December ...... 815 31 20 26.3 1,620 Calendar year 1943 ...... 43,857 648 11 120 87,010 772 29 21 24.9 1,530 February . . . » 790 31 23 27.2 -1,570 1,428. 98 30 46.1 2,830 6,048 304 109 SOS 12,000 16,952 860 212 547 33,620 19,774 813 495 659 39,220 6,494 490 70 209 12,880 1,945 96 47 3,860 September ...... 1,180 49 30 39.3 2,340 Water year 1943-44 ...... 58,473 860 20 160 116,000 * Winter discharge measurement made on this day. Kote.- Stage-discharge relation affected by ice Xov. 29 to Mar. 19. Time toasles Mountain war time. To convert war time to standard time, subtract 1 hour. 242 SAN JUAN RIVER BASIN

Little Navajo River at Chromo, Colo.

Location.- Water-stage recorder, lat. 37°02'10", long. 106°50'35", in SEi sec. 4, T. 32 N., R7 IE., at highway bridge at Chromo, a quarter of a mile upstream from mouth. Datum of gage is 7,288.52 feet above mean sea level, datum of 1929. Drainage area.- 21.9 square miles. Records available.- May 1935 to September 1944. Extremes.- Maximum discharge during year, 139 second-feet May 5 (gage height, 3.72 feet); minimum dally, 0.2 second-foot July 19-21, 23, 24, July 28 to Sept. 4, Sept. 10-24. 1935-44: -Maximum discharge, 399 second-feet May 14, 1941 (gage height, 4.32 feet, site then in use), from rating curve extended above 250 second-feet: no flow Aug. 31, 1938, July 7, 1939. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good except those for periods of ice effect or no gage-height record, wnicn are poor. Diversions above station for irrigation. ,

scharge. in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.9 2.3 bl.7 bl.6 1.7 1.9 ' b!2 30 52 4.9 0.2 0.2 2 1.8 2.6 1.8 bl.7 1.6 2.1 b!4 25 42 ' 4.6 .2 .2 S 1.4 3.1 b2.0 1.8 1.6 2.4 b!6 22 38 4.0 .2 .2 4 1.8 3.4 bl.8 1.7 1.7 2.7 b20 61 31 7.5 .2 .2 5 1.9 3.6 2.1 1.6 1.7 2.7 30 92 27 19 .2 .5 R 1.9 2.1 b2.1 1.7 1.6 2.6 52 66 24 11 .2 .5 7 1.9 2.1 2.1 1.8 1.6 2.4 45 72 25 7.5 .2 .4 a 1.9 2.'3 2.1 1.8 1.7 2.4 45 66 31 5.4 .2 .4 9 1.9 2.8 2.1 1.7 1.8 2.7 39 61 30 4.3 .2. .3 10 1.9 3.4 l.S 1.7 i.e 3.4 29 66 25 4.3 .2 .2 36 1? 2.3 2.8 1.8 1.7 1.7 5.2 38 84 22 2.9 .2 .2 13 2.3 2.1 2.0 1.6 1.6 6.6 35 97 18 2.7 .2 .2 14 2.3 1.8 2.1 1.5 1.5 7.6 29 112 17 2.4 .2 .2 15 2.3 1.9 2.0 1.5 1.4 »8.5 27 116 16 2.5 .2 .2 2.3 1.9 1.9 1.5 1.3 6.5 21 100 14 2.5 .2 > .2 2.3 2.3 1.8 1.6 1.3 8.0 *16 79 11 2.5 .2 .2 18 1.6 2.1 bl.9 1.7 1.3 5.0 15 53 8.7 1.0 .2 .2 1.9 *2.3 bl.9 1.7 1.3 4.5 17 44 6.0 .2 .2 .2 20 1.8 i.e b2.0 1.6 1.3 8.0 15 51 5.4 .2 .2 ,2 1.8- 1.8 2.1 1.6 1.3 6.5 21 50 6.7 .2 .2 .2 1.6 2'.01.9 2.3 1.6 1.4 5.0 20 53 6.9 .3 .2 .2 23 1.6 1.9 1.6 1.4 7.5 33 59 4.6 .2 .2 .2 1.4 2.2 1.9 1.6 1.4 8.0 39 57 4.9 .2 .2 .2 25 1.4 2.1 bl.7 1.7 1.4 8.5 32 52 5.2 .3 .2 .3

QC 1.4 1.9 bl.7 1.7 1.5 8.0 29 50 5.4 .3 .2 .3 1.6 1.8 i.e 1.8 1.7 8.5 42 54 3.5 .3 .2 .3 28 1.6 bl.7 1.9 1.7 1.8 9.5 47 52 3.8 .2 .2 .3 2.6 bl.7 bl.9 1.7 1.6 10 36 59 2.9 .2 .2 .3 1.6 bl.7 bl.8 1.7 - 11 31 55 2.9 ,2 .2 .3 " 31 1.6 bl.7 1.7 ~ 11 ~ 54 ~ .8 .2 -

Seccnd- Runoff in Month fcot-days Maximum Minimum Mean acre-feet

68 9 2 30 December...... 59.5 2.3 1.7 1.92 118 Calendar year 1943 ...... 3,073.4 82 .1 8.42 6,090 51.7 1.8 1.5 1.67 44.8 1.8 March...... 185.5 11 1.9 5.98 861 52 12 Hay...... 1,960 116 22 ^_ 63.2 515.9 52 95.2 19 .2 6.2 .2 September ...... 7.7 .5 .2 .26 15 Water year 1943-44 ...... 3,933.9 116 .2 10.7 7.80O * Winter discharge measurement made on this day b Stage-discharge, relation affected by ice. Note.- Ho gage-height record Nov. 21-27, Dec. 11-17, Jan. 3 to nar. 31 (stage-discharge relation ffected by ice during moat of period); discharge computed on basis of 3 discharge>ge measurements an< weather records. Time basis; Mountain war tim> To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 243

Pledra River near Pledra, Colo. Location.- Water-stage recorder, lat. 37°14', long. 107°20', in sec. 8, T. 34 N., R. 4 W., at crossing of U. S. Highway 450, three-quarters of a mile upstream from Yellow Jacket Creek and 14 miles north of Piedra. Drainage area.- 371 square miles. Records available.- November 1911 to July 1912, October 1939 to September 1944. Extremes.- Maximum discharge during year, 4,810 second-feet May 15 (gage height, 6.82 reet;, from rating curve extended above, 3,040 second-feet; minimum daily, 45 second- feet Sept. 23, 24. 1911-12, 1939-44: Maximum discharge, 5,400 second-feet May 13, 1941 (gage height, 8.0 feet, from floodmarks, site and datum then in use), from rating curve extended above 3,040 second-feet; minimum daily, 23 second-feet Dec. 20, 1939. Maximum flood known occurred Oc.t. 5, 1911. Remarks.- Records excellent .except those for Oct. 1 to Feb. 29, which are good. Diversions above station for irrigation.

Rating tables, water year 1943-44, except period of ice effect (gage height, in feet, and discharge, in second-feet)ond-feet) (Shifting-control method used Oct. 1 to Dec. 31, Jan. 4, Jan. 21 to Feb. 29, May 13, 14) Oct. 1 to May 14 15 to Sept. 30 1.7 2.6 205 4.9 1.820 1.6 2.2 123 4.2 1,270 1.9 3.0 380 5.5 2,600 1.7 2.4 175 4.7 1,790 2.1 3.6 690 6.0 3,30O l.e 2.7 290 5.3 2,580 2.2 4.1 1,020 6,4 3,900 1.9 70 3.2 540 6.3 4,020 2.4 4.5 1,370 2.0 S5 3.8 940

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 72 35 57 b57 60 55 Ill 845 2,470 1,180 125 63 2 7S 78 68 b54 59 58 113 908 2,340 1,150 121 60 . 3 76 S4 59 b62 56 61 154 852 1,950 1,120 113 59 4 73 88 54 67 58 60 254 852 1,530 1,110 107 58 5 72 93 62 b56 60 59 450 l.OSO 1,320 1,190 101 56 605 1,490 1,110 56 6 69 90 67 b54 57 51 1,500 107 58 - 7 67 56 72 *b56 59 51 720 l.SOO 1,870 972 103 8 69 56 66 b60 e\ 54 714 1,880 2,010 S56 96 58 9 69 74 67 b56 65 56 702 2,000 2, 270 800 119 53 10 67 82 56 b56 «61 6Q 535 2,040 2,370 751 142 56 11 65 78 48 b58 55 65 595 2,120 2,330 667 113 53 12 78 79 58 b60 57 73 732 2,260 2,080 564 103 52 13 74 76 73 b58 68 77 726 2,840 1,850 512 92 51 14 69 73 78 b52 62 73 550 3,760 1,840 475 82 49 15 68 69 74 b52 65 65 450 4,000 1,860 430 78 49

ID1 R 66 68 64 a56 61 60 435 3,860 1,810 395 76 56 17 64 73 60 a56 58 68 371 3,100 1,640 360 74 54 18 62 73 84 a56 58 77 366 1,930 1,640 355 73 52 19 S4 70 » 69 a56 56 74 380 1,650 1,770 335 85 51 20 90 68 76 a56 56 73 358 1,810 1,860 600 85 49 21 77 «69 72 57 58 69 317 1,930 1,890 445 94 48 22 72 74 67 58 56 60 263 2,270 1,750 370 78 47 n-r AO 72 79 68 59 55 65 390 2,590 1,680 294 73 45 24 70 78 67 62 56 73 615 2,890 1,760 286 80 45 25 72 74 53 61 58 78 615 2,380 1,660 278 H03 49 26 74 67 60 64 57 74 630 2,160 1,700 234 94 65 27 -7876 50 68 62 56 67 726 1,930 1,560 200 7S 78 28 50 65 61 56 66 1,040 1,910 1,370 175 72 SO 29 148 55 58 61 55 67 859 2,410 1,300 158 68 76 151 57 64 60 - 81 774 2,540 1,250 145 65 69 30 ~ - ~ - - 31 113 70 58 107 2,510 135 64 Second Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 2,435 151 62 78.5 4,830 November...... 2,156 93 50 72.2 4,300 December...... 2,029 78 48 65.5 4,020 Calendar year 1943 ...... 92,213 1,540 46 253 182,900 January ...... 1,801 67 52 58.1 3,570 February...... 1.699 68 55 5S.6 3,370 March...... 2,077 107 51 67.0 4,120 April ...... 15,550 1,040 111 51S 30,840 May...... 66,607 4,000 845 2,149 132,100 June ...... 54,220 2,470 1,250 1,607 107,500 July...... 17,652 1,190 135 569 35,010 August ...... 2,864 142 64 92.4 5,680 September ...... 1,700 80 45 56 .-7 3,370 Water year 1943-44 ...... 170,800 4,000 45 467 338,700 « Winter discharge measurement made on this flay. a No gage-height record; discharge computed on basis of weather records and records for San Ju River at Fagosa Springs. b Stage-discharge relation affected by ice. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 244 SAN JUAN RIVER BASIN

Valleclto Reservoir near Bayfleld, Colo.

Location.- Float gage, lat. 37°23', long. 107°34', in sec. 19, T. 36 N., R. 6 W., at vaiied to Dam on Los Pinos (Pine) River, 1,000 feet upstream from Little Red Creek and 11 miles northeast of Bayfield. Datum of gage is 7,580 feet above mean sea level (Bureau of Reclamation bench mark). Gage heights have been reduced to elevations above mean sea level. Records available.- April 1941 to September 1944. Extremes.- Maximum contents during year, 86,820 acre-feet July 6, 7 (elevation, 7,649.6 reet;; minimum, 13,710 acre-feet Sept. 30 (elevation, 7.604.8 feet). 1941-44: Maximum contents, 94,350 acre-feet June 19, 1942 (elevation, 7.652.7 feet); minimum, that of Sept. 30, 1944. Remarks.- Dam completed In March 1941. Capacity of reservoir, 126,280 acre-feet between elevations 7,580 (sill of outlet gate) and 7,665 feet (crest of spillway). Dead storage, 3,395 acre-feet. Water is used for irrigation in Pine River Basin. Figures given herein are usable contents. Cooperation.- Gage heights furnished by Bureau of Reclamation.

Honthly elevations and contents, water year October 1943 to September 1944 Change In contents Date Elevation Contents during month (feet) (acre-feet) (acre-feet)

Dec. ;?1...... 7,619.0 28,670 -790 _ _ -16,930

7 634 4

Water year 1943-44...... _ -34.760

Time basis; Mountain war time, To convert mar time to standard time, ubtract 1 hour. SAN JUAN RIVER BASIN 245

Los Plnos River near Bayfield, Colo. (Locally known as Pine River) Location.- Water-stage recorder, lat. 37°21', long. 107°36', In sec. 26, T. 36 N., R.>7 w., a quarter of a mile downstream from Red Creek and 9 miles north of Bayfield. Datum of gage Is 7,415.08 feet above mean sea level, adjustment of 1912. Drainage area.- 284 square miles. Becorgs available.- October 1933 to September 1944 in reports of Geological Survey, octooer 1927 to September 1944 (at present site) and May to September 1926 (at site 2 miles upstream) In reports of State engineer. Average discharge.- 17 years (1927-44), 375 second-feet. Extremes.- Maximum discharge during year, 2,240 second-feet June 17 (gage height, 4.82 reet;; minimum dally, 21 second-feet Jan. 8. 1926-44: Maximum dally discharge, 5,070 second-feet May 26, 1926; minimum dally, 3.2 second-feet Feb. 11, 1941 (result of storage In Valleclto Reservoir): minimum daily (prior to construction of Valleclto Reservoir),, 38 second-feet Dec. 21, 22; 1937. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records' excellent. Discharge regulated by Valleclto Reservoir (see p. 244). Diversions above station for Irrigation.

Rating table, water year 1943-44 (gage height, in feet, and discharge in second-feet) (Shifting-control method used Dot'. 11 to Dec. 19, Jan. 7 to Feb. 10, Sept. 9-30) 0.9 17 1.5 64 2.6 440 1.0 25 1.7 122 2.S 540 1.1 34 l.S 146 3.0 670 1.2 44 2.0 £06 4.0 1,470 1.3 56 2.3 310 5.0 2,420

Discharge, in second-feet, water year October 1943 to September 1944 bay Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. I 372 358 149 91 69 68 72 171 2,110 1,490 60O 1,020 Z 372 296 88 91 69 68 74 177 2,120 1,420 564 1,010 3 372 180 88 91 69 68 76 177 2,110 1,420 564 1,000 4 372 180 88 91 69 68 73 180 2,120 1,420 558 996 5 372 177 88 91 69 68 80 122 2,120 1,480 558 988 6 368 177 SS 76 69 68 82 102 2, ISO 1,420 552 972 7 368 17.7 88 23 69 68 S4 112 2,110 1,410 552 916 8 368 177 89 21 69 68 S4 116 2,120 1,280 558 376 9 364 177 89 23 69 68 84 120 ' 2,140 1,200 546 376 10 364 177 89 22 69 68 82 134 2,170 996 540 360 11 369 177 39, 30 68 68 S4 193 2,170 876 540 860 12 359 177 89 68 68 68 '8886 237 2,190 876 540 844 13 359 . 177 89 68 6S 68 275 2,200 772 535 S28 14 359 177 S9 68 6S 68 86 395 2,220 712 535 823 15 359 174 89 68 68 68 81 648 2,220 712 535 756 16 .354 174 89 68 68 68 SI 1,120 2,220 712 530 . 733 17 354 174 89 68 68 69 81 2,140 2,170 712 530 719 18 354 174 S9 69 6S 69 SI 2,120 2,090 712 530 719 *9 354 174 89 69 68 69 81 2,080 1,980 719 530 705 20 350 114 91 69 68 69 S4 2,100 1,880 712 530 663 21 342 88 91 69 68 69 S2 2,090 1,880 712 525 688 22 342 88 91 69 68 69 S2 1,600 1,830 705 525 614 23 342 88 ' 91 69 68 69 84 1,690 1,680 705 490 600 24 342 88 91 72 68 69 86 2,110 1,880 705 450 588 26 342 88 91 70 69 69 S9 2,050 1,880 698 450 582 26 342 88 91 70 68 69 SS 2,000 1,780 69S 445 570 27 342 108 91 70 68 69 91 1,990 1,740 691 764 552 28 342 190 91 70 68 69 95 1,990 1,740 691 1,050 576 29 342 190 91 70 68 69 95 2,020 1,630 684 1,040 594 30 342 190 91 70 69 118 2,080 1,580 677 1,040 546 31 342 - 91 70 - 69 " 2,140 ~ 677 1,030 ~ Seoond- _ Runoff in Month foot-days MaxiBUlD Minimum 119811 aore-feet October...... 11,015 372 342 355 21,850 November...... 4,954 338 88 165 9,830 December...... ~ ...... 2,837 149 S8 91.5 5,630 Calendar year 1943 ...... 119,920 1,290 50 329 237^900 January...... 2,034 91 21 65.6 4,030 February...... 1 933 69 66 6S.4 3,980 March...... o* io» 69 DOAft 68.5 4,210 1...... 2^539 118 72 84.6 5,040 ft? ^4,473 2,140 102 1,112 8,380 Jane ...... 60,450 2,220 1 *67758C 2,015 119,900 July...... 28,634 1,490 924 56 79O AuguSt...... 18,730 1,050 445 604 37^150 Septenber...... 23,019 1,020 546 767 45,660 Water year 1943-44 ...... 192,791 2,220 21 527 382,400 Time basis; Mountain war time. To convert war time to standard tiae, subtract 1 hour. 246 SAN JUAN RIVER BASIN

Los Pinos River at Ignacio, Colo.

Location.- Water-stage recorder, lat. 37°07'45", long. 107°37'50", in sec. 5, T. 33 N«, R. 7 W., three-quarters of a mile upstream from Ignacio and 2 miles upstream from Rock Creek. Drainage area.- 448 square miles. Records available.- April 1899 to October 1903, September 1910 to December 1914, and octooer i9bu to September 1944 in reports of Geological Survey. April 1899 to October 1903, September 1910 to November 1912, and March 1913 to December 1931 in reports of State engineer of New Mexico. Average discharge.- 28 years (1910-11, 1913-40), 373 Second-feet, prior to completion or yaiiecito uam. Extremes.- Maximum discharge recorded during year, 2,140 second-feet May 19 (gage height, 4.«a feet); minimum daily, 36 second-feet Nov. 27. 1910-14, 1930-44: .Maximum discharge recorded, 5,570 second-feet Aug. 27, 1932, (gage height, 6.19 feet), from rating curve extended above 2,600 second-feet by logarithmic plotting; minimum daily discharge observed, 0.1 second-foot Aug. 11, 1913. Maximum flood known occurred Oct. 5, 1911 (discharge not determined), when gage was destroyed. Remarks.- Records good except those for periods of ice effect, which are poor. Flow regulated by Vallecito Reservoir (see p.244 ). Diversions above station for irri­ gation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 115 230 143 99 b85 88 209 310 1,720 915 220 661 122 230 130 103 bSO 90 202 338 1,710 846 16S 661 122 126 108 *106 *b80 101 226 338 1,740 854 143 654 120 92 106 101 82 106 242 328 i,6eo 846 143 640 118 86 108 97 82 101 254 324 1,650 879 141 634 6 115 76 110 b90 82 97 288 302 1,610 870 143 628 112 a 80 110 b60 84 95 288 315 1,590 854 138 59 S 122 a 85 108 b40 86 99 253 306 1,580 774 131 568 149 a85 115 b40 88 97 254 302 1,570 668 149 556 146 a85 106 b60 82 99 230 324 1,540 562 136 544 11 157 a85 101 blOO 82 120 226 365 1,540 410 131 520 160 a 80 99 b95 86 141 242 342 1,530 388 131 487 163 a 80 na b85 86 135 274 375 1,520 350 131 470 163 a75 108 b80 82 169 279 483 1,480 283 131 465 169 a75 106 b80 90 176 212 794 1,490 276 131 450 16 189 75 106 b80 84 143 223 1,260 1,490 25S 131 402 192 75 95 b80 84 169 ZfK 1,430 1,480 238 13S 388 18 195 75 95 b80 *82 189 182 al.800 1,370 230 146 388 230 75 103 t>80 82 141 176 2,140 1,280 258 154 370 S16 75 106 b80 84 149 192 2,000 1,150 330 151 338 21 226 48 106 b80 86 130 202 1,950 1,150 334 154 298 223 38 108 *b85 84 118 182 1,730 1,150 322 149 290 223 52 108 b95 88 128 195 1,420 1,150 290 141 286 24 226 44 108 b90 88 160 220 1,880 1,150 306 108 283 223 39 101 bes 97 179 234 1,850 1,200 310 104 306 26 223 38 99 b80 92 141 223 1,850 1,160 306 102 314 27 220 36 108 b80 86 141 230 1,830 1,100 302 244 318 223 71 106 b85 ^86 135 262 1,790 1,050 290 734 310 279 112 97 b85 86 135 310 1,750 1,080 283 682 346 238 120 101 b80 _ 173 279 ' 1,750 960 276 675 350 230 - 97 b80 - 212 - 1,740 - 255 668 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet 5,609 279 11 £ 181 11,130 2,545 230 36 84. 8 5,050 December...... 3,316 143 9E 107 6,580 Calendar year 1943 ...... 69,393 1,190 Sf. 190 137,600 2,561 106 4C 82.6 5,080 2,466 97 8C 85.0 4,890 March...... 4,157 212 6£ 134 8,250 6,996 310 17C 233 13,880 May...... 2,140 30E 1,088 66.87O 41,870 1,740 96C 1,396 83,060 July 14,363 915 23 C 463 28,490 6,643 734 10£ 214 13,180 September ...... 13,523 661 282 451 26,820 Water year 1943-44 ...... 137,765 2,140 36 376 273,300 * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of weather records and records for near Bayfield. b Stage-discharge relation affected by ice. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 247 Animas River at Howardsville, Colo.

Location.- Water-stage recorder, lat. 37°50', long. 1Q7°36', In sec. 12, T. 41 N., R. 7 W., 0.4 mile southwest of Howardsvllle and hall a mile downstream from Cunnlnghan Creek. Datum of gage Is 9,616.98 feet above mean sea level, adjustment of 1912. Drainage area.- 55.9 square miles. Records available.- May 1936 to September 1944. Extremes.- Maximum discharge during year, 1,120 second-feet June 24 (gage height, 3.68 feet), from rating curve extended above 700 second-feet; minimum dally, 15 second-feet Jan. 12-22, Mar. 5. 1936-44: Maximum discharge, 1,700 second-feet June 21, 1938 (gage height, 4.50 feet), from rating curve extended above 800 second-feet; minimum dally, 11 second-feet Feb. 27, 28, 1941. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records excellent expept those for period of Ice effect, which are good. Ho diversion above station.

Rating tables, water year 1943-44, except period of lee effect (gage height. In feet, and discharge. In second-feet) (Shifting-control method used Oct. 4 to Nov. 5) Oct. 1 to Jan. 31 Feb. 1 to Sept. 30 0.8 15 0.7 13 1 .4 64 2.6 440 .9 19 .8 16 1 .6 95 3.0 650 1.0 24 1.0 26 1 .8 135 3.3 850 1.2 41 1.2 41 1 .9 160 1.3 51 2 .2 260

Discharge, in seoond-feet. water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 40 34 27 19 17 16 IS 23 565 644 152 42 2 40 33 26 19 17 16 18 24 535 602 145 40 3 39 33 25 19 16 16 18 23 395 590 138 40 4 37 34 24 18 16 16 20 23 292 570 129 38 5 36 36 23 18 16 15 22 26 264 580 123 38 6 36 36 22 *18 16 16 25 35 332 575 117 38 7 36 34 22 le 16 18 27 51 410 5S5 113 37 8 35 36 22 18 16 19 26 60 415 505 113 36 9 34 36 22 18 *16 20 25 74 520 505 129 35 10 33 36 22 17 16 *18 23 84 626 490 , 119 35 11 36 36 22 17 17 18 24 89 626 410 109 34 12 36 36 22 15 16 18 27 131 614 363 103 33 13 34 36 22 15 16 19 26 225 602 250 93 33 14 36 36 22 15 16 26 24 300 656 327 85 33 15 36 36 21 15 16 26 23 368 614 296 79 33 -16 36 36 21 15 16 24 22 445 602 280 76 32 17 36 36 20 15 16 19 22 376 500 288 70 32 18 36 36 20 15 16 18 22 264 565 276 68 31 19 37 36 20 15 16 18 22 214 668 288 66 30 20 35 36 20 15 16 18 22 264 717 fr 336 63 30 21 31 35 20 15 16 18 22 288 745 296 61 30 22 35 35 20 15 16 18 21 336 745 264 59 29 23 33 32 20 16 16 IS 22 450 794 239 56 29 24 31 33 20 17 16 18 22 475 780 236 61 29 25 33 33 20 19 16 17 22 485 759 222 58 30 26 34 31 20 IS 16 17 22 500 787 208 54 31 27 33 29 20 18 16 18 24 430 662 194 50 31 !s 36 29 19 18 16 16 24 490 638 187 48 30 29 34 28 19 IS 16 17 24 575 614 187 47 29 30 36 27 20 17 _ 17 22 596 638 181 45 28 31 36 - 19 16 - 17 - 560 - 166 42 -

Seoond- _.. Runoff in ' Month foot-days Maximum Minimum ***** acre-feet October...... 1,096 40 31 35.4 2,170 November...... 1,020 36 ei 34.0 2,020 December...... 662 27 19 21.4 1,310 Calendar year 1943 ...... 37,615 516 13 103"~ 74,600 January...... 521 19 15 16.0 1,030 February...... 467 17 16 16.1 926 March...... 565 26 15 18.2 1,120 April...... 681 27 IS 22.7 1,350 May...... 8,284 596 23 267 16,430 June ...... ' 17,680 794 264 589 35,070 July...... 11,080 644 166 357 21,980 August...... 2,671 152 42 86.2 5,300 September ...... '...... 996 42 28 33.2 1,980 Rater year 1943-44 ...... 45,723 794 15 125 90,690 * Winter discharge measurement made on thla day. i Mote.- Stage-discharge relation affected by lee Jan. 15 to Mar. 9. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 248 SAN JUAN RIVER BASIN

Anlntas River at Durango, Colo.

Location.- Water-stage recorder, lat. 37°17', long. 107°52', In sec. 20, T. 35 N., R. 9 W. f at Western Colorado Power Co.'s plant at Durango, half a mile upstream from Llghtner Creek. Datum of gage Is 6,501.57 feet above mean sea level, datum of 1929. Drainage area.- 692 square miles. Records available.- June 1895 to December 1905, January 1910 to December 1914, and October 1933 to September 1944 in reports of Geological Survey. June 1895 to December 1905 and December 1910 to September 1944 In reports of State engineer. Average discharge.- 43 years (1895-1900, 1901-5, 1910-44), 916 second-feet. Extremes.- Maximum discharge during year, 6,990 second-feet Way 16 (gage height, 6.04 feet); minimum dally, 166 second-feet Feb. 28. 1895-1900, 1901-5, 1910-44: Maximum discharge, 25,000 second-feet Oct. 5, 1911 (gage height, 11 feet), from rating curve extended above 7,000 second-feet; discharge of flood of June 29, 1927, 20,000 second-feet (gage height, 9.65 feet); minimum daily, 50 second-feet Dec. 22, 1917. Remarks.- Records excellent except those for period of-no gage-height record, whloh are fair. Diversions above station for irrigation. Natural regulation by many lakes and artificial regulation for power.

Discharge, in second-feet, water year October 1943 to Septeaber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 311 307 246 198 208 183 373 695 5,370 3,870 757 aS15 2 307 294 262 183 198 187 373 838 5,260 3,590 701 aS05 .3 303 294 239 205 187 198 412 896 4,300 3,560 669 a295 4 294 303 239 208 190 201 532 923 3,150 3,490 638 a287 5 294 307 242 176 194 205 676 1,020 2,620 3,300 650 a280 6 286 303 254 216 212 176 772 1,380 S.830 3,200 644 a272 7 278 286 250 227 194 176 887 2,030 3,700 3,070 588 a265 S 27O 270 242 212 201 183 816 2,330 3,990 2,470 58» a250 9 262 286 258 212 208 190 808 2,440 4,400 2,590 638 a245 10 262 298 346 212 201 208 714 2,710 5,260 2,440 695 " 239 11 262 286 235 235 187 220 650 2,410 5,680 2,280 600 235 12 290 282 231 216 169 231 695 2,620 5,310 1,850 560 231 13 290 282 235 208 201 227 743 3,560 4,650 1,760 538 235 14 278 282 246 205 180 246 695 4,300 4,790 1,610 482 231 15 278 282 227 220 183 235 619 5,030 4,770 1,440 462 239 16 274 278 SIS 223 190 198 607 5,820 4,850 1,340 462 246 17 266 274 208 201 183 246 577 5,860 3,950 1,350 457 239 IS 258 27S 230 208 194 282 543 3,820 3,880 1,360 437 227 19 303 274 242 208 180 286 526 3,140 4,370 1,870 452 223 20 328 270 254 205 169 278 566 3,300 4,930 1,650 442 227 21 307 266 246 205 173 290 588 3,480 5,330 1,590 432 339 22 298 266 23S 201 180 266 538 3,730 5,110 1,370 417 250 23 298 298 235 208 180 262 549 4,350 4,710 1,200 398 227 24 282 290 223 205 190 262 588 5,160 5,030 1,130 417 ssn 25 274 278 - 187 194 194 282 625 4,910 5,150 1,140 437 231 26 290 254 201 194 187 282 600 4,480 4,690 1,050 407 266 27 290 C54 198 183 180 266 631 4,150 5,030 1,020 383 £94 28 290 250 208 235 166 262 764 4,300 4,280 950 354 334 29 35O 254 190 216 173 258 779 5,200 4,080 878 a345 315 30 355 250 187 205 - 282 695 5,530 4,080 869 aS30 294 31 355 ~ 201 198 - 332 5,480 808 a322 Seoond- Runoff in Month foot-sdays Maximum Minimum Mean ao re-fen

October...... 9,083 355 25EJ 293 18,020 November...... 8,396 307 25C) 280 16,650 December...... 7,099 258 18'! 229 14,080 Calendar year 1943 ...... 276,842 3,660 15C) 758 549,100 January .. 6,422 235 17« 207 12,740 February...... 5,452 212 iee 188 10,810 arch...... 7,400 332 17« 239 14,680 April...... 18,941 887 37; 631 37,570 ay...... 105, 892 5,860 69E 3,416 210,000 Juno * 135,550 5,680 -. 4,518 268,900 July...... 59,495 5, 870 801 1 'so?919 118 000 August ...... 15,702 757 32! 1 3l)l40 Septeaber...... 7,753 324 231 258 15,380 Water year 1943-44 ...... 387,185 5,860 16 1,058 768,000 a Ho gage-height record; discharge computed on basis of records for stations on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SMT JtttN RIVER BASIN 249

Anlmas River near Cedar Hlll/N. Mpx.

Location.- Water-stage -recorder, lat. 37°02'15", long. 107°52'25", In sec. 7, T. 32 N., H. 9 w., three-quarters of a mile downstream from Florida River, 2.5 miles upstream from Colorado-New Hexlco State line, and 8.5 miles north of village of Cedar Hill. Records available.- November 1933 to September 1944. Average discharge.- 10 years, 1,047 second- feet. Extremes.- Maximum discharge during year, 7,780 second-feet Hay 16 (gage height, 6.95 reet); minimum daily, 185 second-feet (estimated) Jan. 9, 16. 1933-44: Maximum discharge, 11,900 second-feet May 14, 1941 (gage height, 9.50 feet); minimum daily, $0 second-feet Jan. 21, 1935. Maximum flood known occurred Oct. 5 or 6, 1911. Remarks.- Records good except those for periods of ice effect or. no gage-height record, wnicn are fair. Diversions above station for Irrigation. The point of diversion of Twin Rocks Canal was changed from below to above station In April 1944. (See miscel­ laneous discharge measurements p. 352.)

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. se»t.

1 385 426 _ 284 223 ft£35 .231 4S2 al,010 6,010 4,140 848 304 2 376 392 296 216 23S 250 478 1,120 5,880 3,790 792 896 3 388 388 287 24S 220 383 498 1,100 4,860 3,700 726 289 4 372 398 287 238 313 369 650 1,070 3,600 3,680 680 276 5 369 398 282 236 236 352 854 1,240 2,940 3,460 640 266

6 359 402 29630'S b250 250 223 1,010 1,750 2,960 3,350 630 283 7 356 385 W320 263 303 1,120 2,480 3,790 3,800 602 263 8 349 352 282 b!90 244 310 1,030 2,640 4,320 2,660 598 263 9 343 365 303 W8S 255 323 992 2,710 4,710 2,670 635 858 10 340 388 299 W.93 247 25S 93S 2,990 5,780 2,520 7S3 2SO 11 336 388 267 a220 200 310 848 2,860 6,440 2,380 660 836 12 659 372 269 8215 208 326 884 2,880 6,040 1,970 598 833 13 369 362 265 8200 220 323 1,020 3,770 5,290 1,830 667 893 14 362 362 290 8200 220 396 950 4,770 5,260 1,690 622 248 IS 362 369 267 8195 208 379 802 5,740 5,450 1,540 494 250 18 352 343 251 8185 218 295 764 6,960 5,470 1,440 474 Sfil 17 352 340 238 a!90 210 348 720 6,760 4,520 1,410 463 £65 18 340 340 240 8195 213 459 675 4,600 4,320 1,420 451 860 19 378 336 276 8195 203 410 8680 3,610 4,730 1,340 474 860 20 437 324 29Q 8200 198 407 8690 3,740 5,380 1,730 4S1 868 21 395 321 287 *a200 194 362 8680 3,900 5,860 1,730 438 256 22 378 318 276 a200' 206 333 8660 4,180 5,610 1,550 436 352 23 375 . 359 270 ft 240 208 319 8680 4,760 5,820 1,360 418 $47 24 359 349 262 a230 226 372 8700 5,710 5,450 1,280 481 250 25 340 330 236 a220 239 414 8750 5,540 5,540 1,280 438 see 26 356 299 220 &200 231 362 8740 4,920 4,990 1,180 486 304 27 359 393 330 8200 226 326 a26O 4,580 5,470 1,090 , 396 569 28 363 387 238 8210 210 301 a 840 4,640 4,620 1,020 37S 369 29 468 290 220 8235 213 295 8990 5,610 4,380 968 339 368 30 472 290 213 a230 _ 339 a970 6,090 4,340 968 335 31 45S - 223 8225 - 414 - 6,120 890 319 - Second- Runoff in « Month foot-clays MaxiHuB Minima Mean ao re-feet October...... 11,595 472 336 374 23,000 10,556 426 28V 358 80,940 Deoenber...... 8,236 302 812 866 15,330 Calendar year 1943 ...... 320,063 4,190 18G 877 634,900 January...... 6,584 250 186 812 13,060 February...... 6,420 256 194 281 arch...... « ...... 9,891 459 203 319 la! 620 iiprt.1...... 23,795 1,120 478 793 47,200 119,840 6,960 1,010 3,866 837,706- Jttttfr » »....-.,»..... 149,230 6,440 2,940 4,974 296,00©- July...... 63,230 4,140 690 2,040 1S6.400 ' AUgUBt...... ^r< 16,383 842 319 588 38,900 September...... r-. . .^TT. . 8,182 369 833 878, 16,230" Water year 1943-44 ...... 433,941 6,960 185 1,186 860,700 » Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of 1 discharge measurement, weather and records for stations at Durango, Colo.,and Parmlngton, H. Hex. b Stage-discharge relation affected by loe. Tine bastst Mountain war tlae. To convert war time to standard .time, subtract 1 hour. 870650 O - 45 - 17 250 SAN JUAN RIVER BASIN

Animas River at Farmington, N. Hex.

Location.- Water-stage recorder, lat. 36°43'20", long. 108°12 I 00", in SEi sec. 16, T. 29 N., R. 13 W., at bridge on State Highway 17, 0.6 mile southeast of Farmington and 1.1 miles upstream from mouth. Drainage area.- 1,360 square miles. Records available.- June 1904 to October 1905 (published as Animas River near Farmington), September 1912 to December 1914, and October 1930 to September 1944 in reports of Geological Survey. June 1904 to October 1905 (published as Animas River near Farmington) and September 1912 to December 1931 in reports of State engineer. Average discharge.- 31 years (1912-25, 1926-44) 1,054 second-feet. Extremes.- Maximum discharge during year, 7,540 second-feet May 16 (gage height, 7.80 feet); minimum daily, 88 second-feet Sept. 16. 1930-44: Maximum discharge, 12,800 second-feet May 14, 1941 (gage height, 8.9 feet, from graph based on gaga readings), from rating curve extended above 7,700 second- feet by logarithmic plotting; minimum dally, 8.5 second-feet Aug. 18, 1940. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good. Diversions above Btation for irrigation. Records of water analyses for the water year 1944 are given in Water-Supply Paper 1022.

Discharge, in second-feet, water year October 1943 to September 1944 Dstf Oct. Ncv. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept. 1 309 415 296 260 268 246 47S eos 5,960 4,000 642 151 2 296 3S1 300 260 280 264 534 822 5,790 3,600 586 14S 3 309 S6S 300 256 272 292 522 906 5,160 3,390 544 132 4 304 368 284 264 272 318 04 875 3,690 3,440 478 128 5 296 368 288 242 260 288 801 914. 2,730 3,290 425 120 6 292 372 288 a265 276 268 978 1,220 2,550 3,150 400 112 r 286 372 300 a240 280 239 1,080 1,830 3,090 2,960 381 112 s 284 350 292 a210 264 232 1,090 2,320 3,930 2,480 350 108 9 276 340 309 a210 284 239 938 2,420 4,790 2,340 368 108 10 264 358 318 a220 380 250 936 2,730 5,260 2>300 451 106 11 264 372 288 a270 256 268 830 2,730 6,170 2,140 462 108 12 288 368 272 a260 239 354 752 2,590 6,030 1,830 381 101 13 304 358 i 284 a220 239 340 875 3,250 5,300 1,610 345 99 14 314 354 288 a230 246 345 930 4,210 4,830 1,490 314 97 15 309 354 304 a210 242 400 766 5,340 5,160 1,340 284 90 16 309 345 284 a 2£0 242 358 675 6,560 5,140 1,230 268 88 17 300 340 268 a230 250 304 668 6,800 4,670 1,160 a260 90 18 300 340 253 a230 239 415 598 5,220 3,840 1,150 a250' 97 19 304 332 276 a240 242 435 592 3,490 4,270 1,120 276 103 20 350 327 300 «b240 236 430 568 3,340 4,990 1,260 276 99 21 358 318 304 b2SO 239 390 642 3,520 5,560 1,700 a270 106 22 332 322 314 b240 225 363 623 3,S20 5,680 1,450 a270 110 ?X 327 340 300 b250 242 350 642 4,270 5,240 1,280 a260 112 24 318 354 296 272 242 353 642 5,110 5,110 1,180 a270 110 25 309 340 280 272 284 425 689 5,560 5,470 1,110 a290 154 26 300 318 253 239 284 395 717 5,010 4,970 1,050 318 199 27 309 296 250 250 268 372 656 4,590 5,260 914 aSOO 276 28 314 288 284 239 260 340 745 4,440 4,650 830 a270 327 29 381 288 260 292 239 332 906 5,200 4,160 752 a230 345 30 462 296 242 268 _ 336 930 6,150 3,980 710 a200 314 . 31 430 - 239 260 - 405 - 6,170 - 675 a!70 - Seccnd- Runoff in Month foct-days Maxima Minium Mean acre-feet

288 December...... 8,794 318 239 284 17,440 x Calendar year>194S ...... 277,465 3,990 144 760 550,400

Maroh...... 22 409 Uav

September...... 4,250 345 88 142 8,430 Water year 1943-44 ...... 404,090 6,800 88 1,104 801,600 * Winter discharge measurement made on this day. a So gage-height record; discharge computed on basis of recorded range in stage, 1 discharge measurement, weather records, and records for Animas River near Cedar Hill and San Juan River at Farmington. b Stage-discharge relation affected by ice. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 251 Mineral Creek near Silverton, Colo.

Location.- Water-stage recorder, lat.. 37°48'501', long. 107°41 l 45lt , in sec. 13, T. 41 N., R. 8 W., 300 feet upstream from Bear Creek and 2 miles west of Silverton. Datum of gage is 9,399.04 feet above mean sea level, datum of 1929. Drainage area.- 43.9 square miles. Records available.- May 1936 to September 1944. Extremes.- Maximum discharge during year, 930 second-feet June 24 (gage height, 3.60 feet), from rating curve extended above 750 second-feet: minimum, 3.4 second-feet Mar. 14 (gage height, 0.83 foot). 1936-44: Maximum discharge, 1,700 second-feet June 29, 1938 (gage height, 4.69 feet), from rating curve extended above 550 second-feet: minimum, that of Mar. 14, 1944. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records excellent except those for Oct. 14 to June 5, which are good. No diversion above station.

Discharge, in second-feet, water-year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 37 32 26 19 17 16 19 33 510 646 145 47 2 37 31 25 19 15 17 19 35 460 630 140 46 3 35 31 24 19 15 17 22 657 136 43 4 34 31 23 19 15 16 29 35 27S 596 126 42 5 32 23 14 33 34 262 60S 118 40 6 33 32 22 19 16 15 3S 45 325 602 114 40 7 33 32 22 IS 16 16 45 70 435 525 110 42 8 32 32 21 17 16 18 44 95 455 4S6 110 39 9 32 32 21 18 17 19 44 121 547 525 132 38 10 22 IS 39 124 602 492 124 36 11 33 33 21 15 16 17 40 110 608 400 114 35 1?. 33 33 21 16 15 17 44 170 569 345 103 34 13 31 33 21 15 IS 13 43 243 564 345 9S 32 14 33 33 21 15 15 4.2 39 296 624 316 S9 38 15 34 33 20 15 16 4.S 35 358 602 270 84 35 16 34 33 19 15 16 6.2 35 3SS 586 252 84 34 17 34 33 19 15 17 S.2 33 318 481 252 81 32 in 34 33 19 15 16 16 32 243 569 234 79 31 19 33 32 19 15 15 29 31 236 662 262 76 30 20 33 31 19 15 16 26 31 246 738 350 76 29 !>1 33 31 19 15 16 24 30 262 792 270 74 28 ?? 37 29 19 14 16 25 2S 310 756 220 69 23 23 36 32 19 15 15 24 29 374 744 195 67 28 24 33 30 19 17 16 22 30 398 804 206 77 28 25 32 29 19 18 16 21 30 382 756 195 77 31 26 32 28 19 17 16 19 30 362, 804 183 67 37 32 28 19 17 16 19 32 366 702 177 62 52 28 34 28 19 16 15 le 31 435 662 171 58 55 29 33 27 19 17 15 IS 30 526 679 183 55 47 33 26 19 15 - 18 31 505 690 168 52 43 31 33 ~ 19 13 ~ 19 490 ~ 160 49 ~ Second- Runoff in Month foot-daya Maximum Minimum Mean acre-feet

October 37 Deoeober...... 637 26 19 20.5 1,260

914 996 - 45 19 33,2 1,960 Bay...... 526 33 246 15,150 588 July...... 2,846 145 91. S 5,640 September...... 1,114 55 28 37.1 2,210 Pater year 1943-44 ...... 45,275.4 604 4.2 124 69,790. Note.- Ho gage-height record Oct. 14 to HOT. 21, Hov. 24 to Jan. 5; discharge computed 1 dTscharge measurement, weather records, and records for Anlmas River at Howardsville. lias basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 252 SAN JUAN RIVER BASIN

Hermosa Creek near Hermosa, Colo-.

Location.- Water-stage recorder, lat. 37°25'30", long. 107°50'15", In NWi sec. 3, ,T. 36 N., R. 9 W., 1 mile northwest of Hermosa and 2 miles upstream from mouth. Datum of gage Is 6,705.88 feet above mean sea level, datum of 1929. Drainage area.- 172-square miles. Records available.- November 1911 to June 1912, April 1913 to September 1914 (fragmentary), and October 1940 to September 1944 In reports of Geological Survey. April 1913 to September 1914, April 1920 to September 1928 (no winter records prior to 1928), and October 1940 to September 1944 in reports of State engineer. Figures for flood of May and June 1920, publlehed in reports of State engineer, are considered too high from Information by his office. Extremes.- Maximum discharge during year, 2,100 second-feet May 15 (gage height, 4.40 feet)! minimum daily, 16 eecond-feet Feb. 2, 6. 1920-28, 1940-44: Maximum discharge, 3,040 second-feet Sept. 12, 1927 (gage height, 8.50 feet, site and datum then In use, from floodmarks), by slope-area method; minlmxnj daily recorded, 12 second-feet Jan. 4, 1941, but may have been less during periods of no record. Remarks.- Records fair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to Septenber 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 29 31 31 b25 17 b21 160 262 1,000 393 50 89 2 31 32 32 b24 16 22 148 340 S94 351 50 29 3 30 29 32 b2S IS 24 21S 312 822 357 48 28 4 2S 31 31 1)26 17 23 345 345 706 318 45 27 5 27 31 b28 b27 17 23 435 595 686 286 45 27 6 26 25 24 b32 16 b23 472 933 699 254 47 88 7 26 20 24 «b33 18 b24 498 1,080 842 222 43 30 8 26 22 b25 bS2 19 b25 369 1,090 855 197 43 28 9 25 23 24 b32 21 b25 340 1,130 868 181 47 27 10 24 23 27 b32 «b22 26 262 1,140 920 166 49 27 11 24 24 b2S b33 b21 *29 246 1,010 888 151 42 87 12 34 24 29 b30 b!9 36 306 1,200 790 136 40 86 13 2S 24 29 b29 b21 36 301 1,360 680 126 38 86 14 28 23 26 b29 24 33 254 1,630 673 118 36 85 15 27 23 26 b30 25 32 207 1,720 686 112 35 87 16 26 23 , 27 b30 22 37 210 1,680 686 106 35 28 26 22 b25 b2S 24 34 184 1,550 660 100 34 2V 17to Jio 26 22 b2o b26 b22 48 175 1,020 647 96 33 86 J191Q 43 21 b20 b26 b20 48 172 985 647 94 37 85 20 42 20 b23 b2S b!9 49 214 959 673 122 39 85 21 34 20 22 b2S b!9 44 197 1,000 673 88 44 85 22 34 25 21 27 b21 41 172 1,120 647 81 39 25 23 31 24 21 19 b21 38 184 1,310 621 78 36 84 24 30 23 22 23 21 48 222 1,550 588 79 44 86 25 31 22 b21 25 21 64 200 1,220 562 76 43 33 26 31 22 b24 b24 19 55 181 1,070 556 68 38 43 27 30 b24 b22 bl9 19 51 214 959 517 64 35 45 28 32 27 24 b21 19 50 318 966 465 62 32 46 43 2S b23 22 b!9 54 282 1,100 441 59 31 36 29 45 . Ow«fi 27 b24 21 74 234 1,040 423 56 30 32 31 39 b26 17 ~ 134 - 1,020 - 53 29 - Seoond- Runoff in Month foot-days Maximum Minimum Mean ao re-feet

TLrt Q October...... 956 45 24 ou*o I f cmrtV\J\I November...... 735 32 20 24.5 1,460 December...... 781 32 20 25.2 1,550 Calendar year 1943 ...... 42,086 830 15 115 83,480 January...... 828 33 17 26«7 1,640 February...... 577 25 16 14.9*9 Q Q 1,140 llaroh...... 1,271 134 21 41.0 2,580 April...... 7,720 498 148 257 15,310 IttV 32,515 1,720 262 1 *694O49 64,490 June ...... 20,815 1,000 423 41,890 July 4,650 393 53 150 9,280 August...... 1,237 50 29 W S*Q 2,450 September...... 87S 45 24 29.5 1,740 Water year 1943-44 ...... 72,963 1,720 16 199 144,700 « Winter discharge measurement made on this day. . b Stage-discharge relation affected by ice. Sote.- No gage-height record Nov. 3-20; discharge computed on basis of 1 discharge measurement and records for Anlmaa River at Durango. Time basis; Mountain war tine. To convert war time to standard tine, subtract 1 hour. SAN JUAN RIVER BASIN 253

Lightner Creek1 near Durango, Colo.

Location.- Water-stage recorder, lat. 37°16', long. 107°53', In sec. 30, T. 35 S., R% 9 to., naif a mile upstream from mouth and half a mile west of Durango. Drainage area.- 66 square miles. Records available.- October 1933 to September 1939 (at site. 2 miles upstream) and . octooer ±939 co September 1944 in reports of Geological.Survey. June 1927 to September 1939 (at site 2 miles upstream) and October 1939 to September 1944 in reports of state engineer. Average discharge.- 17 years, 24.0 second-feet. Extremes.- Maximum discharge during year, 1,250 second-feet July 20 (gage height, 4.35 reet;, from rating curve extended above 690 second-feet on. basis of slope-area determination at gage height 5.20 feet; minimum daily not determined. 1927-44: Maximum discharge. 2,500 second-feet Oct. 25, 1941 (gage height, 5.90 feet), from rating curve extended above 690 second-feet op basis of slope-area determination at 1,800 second-feet; minimum dally, 1 second-foot or less at times during periods 1930-S1, 1933-35, 1938-40. Remarks.- Records fair. No diversion above station.

Discharge, in second-feet, water year October 1943 to, September 1944 Das Oct. Nov. Dec. 'Jan. Feb. Mar. Apr. May June July Aug. Sept. 1- 2.S 3.4 2.6 1.7 SS 92 95 20 3.4 s. a 2 3.4 3.8 2.2 1.7 ' 6S 103 SS 20 3.4 3.4 3 3.4 4.0 1.8 1.7 79 97 SI 18 3.6 3.4 4 3.4 3.0 1.7 1.7 117 99 57 19 3.4 3.2 5 3.4 2.6 2.0 1.7 134 124 , 46 20 3.6 3.2 6 3.S 2.S 2.0 1.7 152 176 5S 16 3.6 3.2 7 3.4 3.0 *1.S 1.7 117 214 83 15 3.6 2.8 8 3.2 2.6 2.0 1.7 86 211 S6 14 3.6 3.O 9 3.2 3.0 2.4 1.7 . '7283 2OO 83 14 4.8 3.2 10 3.2 3.2 1.9 1.7 206 82 12 4.8 3,0 11 3.0 3.0 1.9 1.8 79 176 76 11 4.2 2.8 12 3.0 2.6 1.9 1.7 82 160 61 4.8 3.0 13 3.0 2.6 2.0 1.6 97 206 49 ¥0.1 4,0 2.S 14 3.4 2.8 2.4 2.2 70 32S 51 7.5 3.4 2.8 IS 3.2 2,4 2.6 2,2 56 321 47 6.6 3.6 2.8 1.5 ' 1.5 16 3.2 2.6 2.2 2.0 65 282 45 4.S 3.4 3,2 17 ' 3.4 2.8 1.7 3,4 48 206 34 3.6 3.4 3.0 18 3.4 2.4 1.7 5.6 44 130 34 3.4 3.6 2.8 19 3.4 2.4 1.7 5.4 46 119 34 4.2 4.0 2.8 20 3.2 2.4 1.7 5.0 52 128 34 90 3.6 2.8 21 2.8 2.6 1.7 4.8 4S 120 - 35 11 3.2 2.6 22 3.2 2.2 1.7 4.6 75 134 SS S.I 3.4 2*6 23 3.4 2.S 1.7 4.S 107 158 SO 7.2 3.2 2.8 24 3.4 2.S 1.7 6.9 100 160 29 5.8 3.2 2.8 25 3.4 2.4 1.7 12 94 120 32 5.0 3.4 2.8 26 ' 3.6 2.2 1.7 11 82 91 26 4,8 3.6 3.4 27 3.8 2.4 1.7 11 82 95 26 4.4 3.4 5.2 28 3.8 2.4 1.7 16 107 107 24 3.6 3.0 6.6 29 4.S 2.2 1.7 18 117 136 21 3.4 3.0 . 5.2 30 3.S 2.2 1.7 _ 38 117 105 20 3,4 3.0 5.2 31 3.8 1.7 - 52 " 105 " 3.4 3.0 Second- Runoff in Month foot-days Maximum Minima Mean acre-feet October...... 105.2 4.S 2.8 3.39 209 Novenber...... 81.6 4.0 2.2 2.72 162 December...... \...... 58.9 2.6 1.7 1.90 117 Calendar year 1943 ...... _...... 7,148.9 188 _ 19.6 14,170 January 46.5 1.5 92 February...... 43.5 _ _ 1.5 80 Maroh...... 220.0 52 1.6 7.10 436 April...... 8,514 134 44 83. S 4,990 May...... 4,899 328 91 158 9,720 June ...... 1,496 95 20 49.9 2,970 Jttly...... f... 378.9 90 3.4 12.2 752 August...... 109.4 4.2 3.0 3.53 217 September...... 99.6 6.6 2.6 3.32 198 Water year 1943-44 ...... 10,052.6 328 - 87.5 19,950 * Winter discharge measurement made on this day. Hote.- Ho gage-height record Dec. 18 to Mar. 9 (probably Ice affected most of period); discharge computed on basis of weather records. Time baals; Mountain war time. To convert war tine to standard tine, subtract 1 hour. 254 SAN JUAN RIVER BASIN

Florida River near Durango, Colo.

Location.- Water-stage recorder, lat. 37°20', long. 107°45', in sec. 4, T. 35 N., R. 8 W., just downstream from Red Creek and 9 miles northeast of Durango. Datum of gage is 7,301.88 feet above mean sea level, datum of 1929. Drainage area.- 96 square miles. Records available.- May to July 1899, April 1901 to October 1903, September 1910 to sepremoer iyia, and October 1933 to September 1944 in reports of Geological Survey. May to July 1899, April 1901 to October 1903, September 1910 to September 1924, and April 1927 to September 1944 in reports of State engineer. Station has been located at several different sites in this vicinity; all records equivalent. Average discharge.- 26 years (1910-12, 1917-24, 1927-44), 124 second-feet. Extremes.- Maximum discharge during year, 1,110 second-feet June 10 (gage height, 3.84 reet;y minimum daily, 4 second-feet Feb. 2-4. 1899, 1901-3, 1910-24, 1927-44: Maximum discharge observed, 4,640 second-feet June 28, 1927 (gage height, 4.50 feet, site and datum then in use); minimum daily, 0.4 second-foot Feb. 15, 1918. Maximum flood known occurred Oct. 5, 1911. Remarks.--Records good except those for period of no gage-height record, which are poor. Diversions above station for Irrigation.

Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 18 22 16 s 5 7 34 111 804 3S3 37 15 2 22 23 18 7 *4 *8 38 129 704 335 35 16 3 22 25 13 10 4 10 42 120 509 331 32 15 4 22 23 16 11 4 12 60 122 361 299 27 13 5 20 23 16 9 6 14 74 155 307 335 26 13 6 20 22 »14 12 10 S 92 2O8 335 326 25 13 7 19 22 13 10 e 7 9S 246 546 2S4 23 13 6 20 26 12 9 lo 7 90 26S 561 244 22 13 9 19 26 14 8 12 10 S5 2S8 726 221 26 12 10 18 21 12 «8 8 12 74 326 924 -192 31 11 11 IS 18 10 10 6 15 77 331 924 171 26 11 12 22 18 9 8 5 14 92 326 798 148 25 10 13 21 19 11 6 8 16 98 429 698 129 21 9.S 14 21 17 15 6 7 17 81 632 709 115 19 8.0 15 20 14 12 S 8 13 73 774 738 120 18 8.6 16 20 13 10 9 9 8 74 774 720 104 14 11 17 18 13 9 9 9 12 66 654 567 90 13 11 IS 18 15 11 7 9 15 62 429 648 94 15 11 19 30 16 15 7 7 15 65 429 714 90 22 in 20 26 16 16 8 5 17 71 462 73S 176 25 10 21 24 15 »13 e 8 T.8 63 499 720 134 24 S'.O9.2 22 25 15 12 s 9 15 63 551 636 107 13 23 22 18 12 7 e 12 76 660 638 87 17 e.6 24 20 19 10 7 9 10 90 744 654 85 23 9.8 25 20 16 9 7 10 10 92 616 567 SI 32 12 26 21 15 10 6 9 12 87 5S3 556 68 31 18 27 22 16 11 5 7 »12 94 540 52 b 60 22 22 28 25 16 9 9 5 13 111 626 443 55 19 21 29 32 16 8 8 5 16 111 744 434 52 IS 21 30 31 16 9 6 - 22 102 792 43S 47 17 21 31 2S ~ 9 5 - 29 ~ 798 ~ 42 16 " Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 684 32 18 22.1 1,360 November...... 554 26 13 18.5 1,100 December ...... 374 IS 8 12,1 742 Calendar year 1943 ...... 31,608.0 660 7.6 86.6 62,700 January...... 246 12 5 7.9 488 February...... 214 12 4 7.4 424 March...... 406 29 7 13.1 805 April...... 2,335 111 34 77.8 4,630 May...... 14,366- 79S 111 463 28,490 June ...... 18,644 924 307 621 36,980 July . - 5,005 383 42 151 9,930 August ...... 720 37 13 23.2 1,430 September...... 385.0 22 8.0 12.8 ^ 764 Water year 1943-44 ...... 43,933.0 924 4 120 87,140 » Winter discharge measurement made on this day. Note.- Ho gage-height record Dec. 7 to Bar. 25 (stage-discharge relation affected by ice moat of period); discharge computed on basis of 4 discharge measurements, weather records, and record for Animaa River at Durango. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 255

La Plata River at Hesperus, Colo.

Location.- Water-stage recorder, lat. 37°17', long. 108°02', In sec. 14, T. 35 N., R. 11 w., an eighth of a mile west of Hesperus. Datum of gage Is 8,106.65 feet above mean sea level, datum of 1929. Drainage area.- 37 square miles. Records avallable.- June to August 1904, April to August 1906, August to December 1910, ana uctooer 1933 to September 1944 In reports of Geological Survey. June to August 1904, April to August 1906, August to December 1910, and Ifey 1917 to September 1944 In reports of State engineer. Average discharge.- 27 years (1917-44), 49.1 second-feet. Extremes.- Maximum discharge during year, 891 second-feet Ifey 15 (gage height, 3.10 feet), from rating curve extended above 380 second-feet: minimum dally, 3.3 second-feet Oct. 11-14. 1904, 1906, 1910, 1917-44: Maximum discharge, 1,880 second-feet Sept. 22, 1941 (gage height, 4.30 feet), by slope-area method; no flow Apr. 4, 1906. Maximum flood known occurred Oct. 5, 1911. Remarks.- Records good above 100 second-feet and fair below. One diversion above station ror irrigation.

Discharge, ia second-feet, water1 year October 1943 to September 1944 Das Oct. Nov. Dec. Jan. Feb. Mar. Apr, May June July Aug. Sept. 1 4.2 13 8.0 7.0 e.o S.9 11 .69 345 90 25 7.7 ?. 4.2 13 7.6 6.9 S.3 9.1 14 72 274 76 20 7.4 3 4.S 14 6.4 7.3 *8.4 9.0 17 71 201 90 19 6.7 4 4.6 14 6.4 7.2 8.7 8.6 26 74 137 100 IS 6.4 5 5.4 12 6.0 6.6 6.9 8.2 61 S7 alSS 67 17 6.7 6 6.0 12 6.0 7.4 S.4 «7.S 126 ' 140 210 62 18 6.7 7 6.4 12 6.0 9.0 S.2 7.S 130 211 301 " 56 17 6.4 8 6.8 12 6.0 7.6 .9 SiO 100 224 31S 17 6.4 9 7. 8 12 6.S 7.0 .6 s.s> 88 231 404 56 19 6.2 10 4.5 11 6.8 7.0 .4 S.3 71 231 516 53 17 6.2 11 3.3 10 6.4 «7.2 .0 8.4 64 193 364 43 16 ' 6.2 12 3.3 10 6.4 6.8 .2 8.7 71 208 290 38 15 6,2 13 3.3 10 6.4 6.6 e.o 6.8 69 319 254 35 14 fc.2 14 3.3 9.6 6.4 6.6 7.9 9.0 5S 443 254 33 14 6,2 Ib 3.6 9.6 6.4 6.9 8.6 8,6 50 661 243 29 14 6.7 16 3.9 8.8 6.8 7.0 8.6 8.4 49 594 215 25 14 6.2 17 a3.9 9.2 7.0 7.0 S.6 8.0 42 398 158 25 14 5.9 18 a3. 9 10 8.0 7.3 S.4 S.8 42 263 179 30 14 5.9 19 a!7 11 9.2 7.6 S.2 8.8 43 242 201 39 16 5.6 20 a!5 11 *9.6 7.8 8.2 9.0 42 B265 22.0 60 14 5.6 21 a!2 10 9.3 S.O S.O 9.0 41 a250 220 45 12 5.4 22 11 10 9.9 S.O 8.2 S.7 41 a290 192 39 11 5.4 23 11 10 9.0 8.3 8.6 7.8 44 328 166 37 10 5,6 24 11 10 8.4 S.6 9.0 7.4 48 556 170 40 IS 5.4 25 11 10 8.0 8.4 9.2 7.8 4S 427 153 3S 10 6.4 2fi 11 10 .2 7.9 8.S 9.0 49 301 162 36 9.7 7,4 ?7 12 10 .0 7.5 8.8 S.4 52 269 141 33 9.3 7.7 m 11 9.2 .0 6.S 9.0 «7,6 60 254 122 32 9.3 7.4 ?q , 17 9.2 >.9 7.4 9.0 S.8 58 461 110 30 9.0 7.0 .TO 14 e.e .0 8.8 - 10 58 352 90 30 6.4 7,O 31 14 ~ .0 S.O - 8.8 ~ 334 - 27 6.0 -

Seoond- Runoff in Month foot-days Maximum Minimum Mean aero-feet Oc tob@ r £49. e 17 3.3 8,06 495 321.4 14 8.8 10.7 637 December...... 225.6 9.9 6.0 7.28 448 Calendar year 1943 ...... 16,541.1 425 3.3 45.3 32,820 9 0 February 241 1 9 Q March...... 52g May...... 17 490 July...... 1,450 August 440.7 September...... 192. £ 7.7 5.4 6.41 3S1 Water year 1943-44 ...... 20,658.6 661 3.3 57.0 41,360 * Winter discharge measurement made on this day. a Ho gage-height record; discharge computed on basis of record_...._ for__ station______at__ Colorado-______Hew_.. Mexico______State line. \ Hote.- Ho gage-height record Dec. 11-13, Dec. 17 to Mar. 27 (stage-discharge relation affecteti by ice most of period); discharge computed on basis of 4 discharge measurements and weather records, Time baais; Mountain war time. To convert war time to standard time, subtract 1 hour. 256 SAN JUAN RIVER BASIN

, La Plata River at Colorado-New Mexico state line

Location.- Water-stage recorder and masonry control, lat. 37°00 I , long. 108011', In sec. 10, T. 32 N., R. 13 w., 300 feet south of Colorado-New Mexico State line and 3 miles north of Pendleton, N. Mex. Datum .of gage Is 5,975.15 feet above mean sea level, datum of 1929. Drainage area.- 331 square miles. Records available.- October 1933 to September 1944 in reports of Geological Survey, reoruary J.y«io to September 1944 In reports of Colorado state engineer. Average discharge.- 24 years, 39.8 second-feet. Extremes.- Maximum discharge during year, 558 second-feet May 16 (gage height, 3.54 reet); minimum dally, 0.1 second-foot Aug. 6, 7. 1920-44: 'Maximum discharge, 4,750 second-feet Aug. 24, 1927 (gage height, 11,36 feet); no flow at times In 1922, 1924, 1928, 1930, 1933-40, 1943. Remarks.- Records good except those for period of Ice effect or no gage-height record, wmcn are fair. Dlverelons above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 s.s 4.6 bll 12 10 15 35 149 165 ee 0.4 3.7 ? 2.4 6.4 bio 11 10 ie 35 131 126 61 .4 3.5 a s.e S.S blO 13 »11 20 46 110 99 61 - .6 3.7 4 s.e S.7 bio 12 12 IS 49 99 71 70 .5 3.7 5 s.o 9.4 bll 11 13 17 61 105 51 60 .6 S.5 s.s 9.4 12 14 14 14 110 120 40 49 .1 3.7 7 4.2 9*4 12 13 16 13 174 178 62 46 .1 3.0 4.6 10 12 12 14 14 135 223 S2 48 .7 2.9 4.6 9.S 13 13 14 15 122 215 98 52 5.5 2.9 10 4.9 7.5 12 14 13 17 105 236 115 38 3.5 2.7 5.7 7.5 13 14 11 ie 105 213 106 10 s.e E.7 5.7 7.5 13 14 12 21 102 176 75 7.e 3.2 1.8 4.6 7.5 13 12 13 ei 115 223 49 4.3 5.2 1.0 4.9 8.3 12 11 11 24 110 309 53 2.7 3 1.0 15 4.9 7.5 12 10 13 23 77 387 51 1.9 e.9 1.0 11' IK 4.3 7.5 12 13 ie 73 466 45 1.6 2.9 1.6 ft 3.0 7.5 13 11 14 18 68 376 27 1.3 2.4 2.1 2.6 7.9 blE 11 14 26 64 233 20 1.1 2.9 3.2 19 4.9 7.9 13 12 13 25 60 180 47 16 4.9 e.9 20 S.S 7.9 13 12 12 31 66 190 47 50 S.5 s.o 6.0 7.1 13 12 12 31 69 163 50 69 3.7 3.2 22 5.7 7.5 14 13 12 83 66 188 60 4S 3.5 3.8 5.7 8.7 b!3 13 13 23 91 245 52 41 S.2 5.2 S.S 9.0 b!2 12 13 23 114 2S5 70 40 4.0 7.0 25 3.8 9.0 bll 11 16 26 95 222 ee 39 5.8 8.2 3.2 9.8 bll 11 14 33 95 144 67 36 &. 4 9.0 3.2 12 bll 10 14 31 94 116 103 30 4.6 11 oo 3.0 12 bll 10 13 2S 107 102 63 26 4.6 14 6.4 13 bll 11 13 25 117 19S 69 12 4.0 9.0 6.4 b!2 bio 11 _ 36 117 168 76 3.8 S.S e.2 31 4.3 "" bll 10 _~ 50 "" 153 ~ 1.9 3.8 Second- Runoff in Month fcct-days Maximum Minimum Mean acre-fest

133.6 6.4 2.2 December ...... 367 14 10 11. e 728 Calendar year 1943 ...... 12,113.3 272 0 33.2 24,030 11 8 February 12 9 740

May...... 6,297 99 2,106 4 t An July...... 995. S 70 1.1 S9.9 6.4 September...... 132.2 14 1.0 4.41 262 Water year 1943-44 ...... 14,514.3 466 .1 39.7 28,800 » Winter discharge measurement made on this day. b Stage-discharge relation affected by ice. Note.- No gage-height record Jan. 4 to Feb. 1, Feb. 4 (stage-discharge relation affected by ice oat or period); discharge computed on basis of 3 discharge measurements and weather records. Time baalai Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 257

La Plata River near Parsilngton, N. Hex.

Location.- Water-stage recorder, lat. 36°44'30", long. 108°14'45" > -In SWi sec. 7, T. SJ9 M., R. 13 W., 1,800 feet upstream from mouth and 2i miles northwest of Parmlngton. Records- available.- March 1938 to September 1944. Extremes.- Maximum discharge during year, 296 second-feet May 16 (gage height, 3.94 feet); no flow at times. 1938-44: Maximum discharge and gage height, not determined; no flow for extended periods. Remarks.-.Records poor. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 19-.4 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 3 10 4 13 I ^ b25 76 99 112 2 3 0 2 1 7 14 9 28 60 96 111 6 2 0 5 1 7 11 15 > bl8 29 59 90 106 5 1 0 4 al 6 10 14 I 2S 64 85 101 3 0 0 5 al 6 20 / a£6 73 77 90 4 0 0 6 2 5 20 . 23 89 81 73 3 0 13 7 3 5 26 22 104 92 55 2 0 e 8 a 6 24 > a20 23 101 114 42 0 0 2 9 z 7 34 23 92 137 37 0 2 0 10 z 1° 29 ' 23 84 147 43 0 5 0 11 4 11 22 a23 82 152 58 1 1 0 12 e 10 23 aE5 87 143 43 0 0 0 13 s 9 27 a29 as 152 28 0 0 0 14 s 9 29 a32 aSS 193 18 0 0 0 15 8 9 26 29 81 237 10 0 0 2 16 7 11 84 ' 615 (») 29 79 254 6 0 0 2 I* 6 11 a22 30 77 217 1 0 0 1 18 6 12 20 ' b!7 32 74 183 1 0 , 0 1 19 6 IE 19 37 73 169 1 0 9 1 20 6 12 22 37 74 177 0 28 2 1 21 6 11 22 W 39 79 169 0 34 0 1 22 6 10 24 37 81 179 0 33 0 1 23 6 18 23 42 85 185 0 24 0 0 24 6 15 22 42 90 187 0 22 0 1 25 6 13 19 46 85 148 0 21 0 24 26 7 10 Mt b22 49 84 114 0 18 31 32 27 6 4 2& 52 82 112 1 11 4 26 28 6 2 23 50 84 114 15 9 1 41 ; 1 (*) 29 27 2 21 - SS 90'89 116 2 8 0 26 30 28 2 15 I Bl5 59 123 1 6 0 7 31 15 , - 14 ' - 70 - 118 - 4 0 Seoond- Runoff in Month foot-days Maxinum Mininua Mean ayre-faet _ ' 1 October...... 204 noCO 6.6 405 November...... 262 18 o 8 7 620 December...... 649 34 4 2o!d 1,290 Calendar year 1943 ...... 8,2S4 217 0 22.6 16,380 January...... t.'.. .. 456 14.7 904 February...... 538 _ _ 16.6 1,070 March...... 1,093 70 22 35.3 2,170 April ...... :...... 2,448 104 59 OX.DAl A 4,860 May...... 4,460 254 77 144 8,850 Juno ...... 955 112 0 31.8 1,890 July ; 244 34 0 7.9 484 August ...... 61 31 0 2.0 121 September...... 188 41 0 6.3 373 Water year 1943-44 ...... 11,558 2S4 0 31.6 22,940 * Winter discharge measurement made on this day. a Mo gage-height record; discharge computed on basis of recorded range In stage, weather records, and records for station at Colorado^Hew Mexico State line, b Stage-discharge relation affected by ice. Time baala; Mountain war time. To convert war time to standard time, subtract 1 hour. 258 SAN JUAN RIVER BASIN

Cherry Creek near Red Hesa, Colo.

Location.- Water-stage recorder, lat. 37°07', long. 108°12', in sec. 7, T. 33 N., R. 12 W., a quarter of a mile upstream from mouth ana 2 miles northwest of Red Mesa. Datum of gage is 6,466.46 feet above mean sea level, adjustment of 1912. Drainage area.- 66 square miles. Records available.- October 1933 to September 1944 in reports of'Geological Survey. March 1928 to September 1944 in reports of State engineer. Average discharge.- 16 years, 10.6 second-feet. Extremes.- Maximum discharge during year, 134 second-feet May 16 (gage height, 3.10 feet); minimum daily, 0.1 second-foot Sept. 8, 12-15, 17. 1928-44: Maximum di-scharge, 1,480 second-feet Aug. 25, 1940 (gage height, 5.90 feet, site and datum then in use), from rating curve extended above 800 second-feet on basis of slope-area determination; no flow at times during 1931, 1933-36, 1938-41. Remarks.- Records fair except those for periods of no gage-height record, which are poor. Diversions above^tatlon for irrigation.

Discharge, in second-feat, water year October 1943 to Septeober 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.0 1.7 1.5 «23 a67 33 5.e 1.0 0.3 2 1.0 #1.4 1.5 22 a60 27 5.S l',0 .3 3 .8 1.2 1.5 22 a55 27 6.7 .3 4 1.1 1.2 <») <*) 1.5 26 48 23 7.2 1.0 3 5 1.0 1.4 1.5 34 48 IS 11 1.0 .3 6 1.0 1.2 *1.5 41 56 16 11 .9 .2 7 .8 1.0 1.5 3S 70 16 7.8 .6 .2 8 1.2 .9 1.5 31 74 18 10 .6 .1 9 1.0 1.0 2.0 2S 78 14 15 .e .2 10 ,8 1.0 3.0 26 8e 12 15 1.7 .2 11 .8 1.1 (*) 4.0 2S aa 9.1 13 1.0 .2 12 .8 1.4 5.0 31 S3 6.7 12 .6 .1 13 1.0 l.S 5.0 31 93 4.0 7.8 .6 .1 14 v 1.1 1.8 6.0 31 106 4.0 6.3 .6 .1- IS .8 1.8 6.0 23 127 5.S 5.4 .5 .1 1.5 > 1.5 > 1.8 16 .8 1.4 6.0 17 127 4.0 4.5 .5 .2 17 .9 1.3 *7.1 23 106 3.5 4.0 .6 .1 18 1.0 1.3 15 23 78 3.3 4.0 .6 .2 19 1.0 1.2 15 22 74 2.6 7.2 .5 .2 20 " 1.2 1.4 20 24 70 2.0 7.4 .5 .2 21 1.4 1.4 20 22 65 1.6 12 .5 .2 2% 1.2 1.4 16 17 70 1.6 7.6 .5 .2 23 1.0 1.6 15 34 74 1-4 6.3 .4 .2 24 .S 2.0 15. 56 70 1.6 6.7 .4 .2 25 .3 2.0 20 41 , 60 1.7 6.7 .3 .5 26 .8 1.6 22 3S 48 1.6 6.5 3, .7 27 .9 1.4 21 34 40 2.3 5.0 ' .3 1.2. 28 1.0 1.2 20 34 42 2.9 4.5 .3 1.3 " 2930 1.3 1.2 IS 38 37 3.6 4.9 .4 1.3 6.3 1.4 _ 25 a 45 36 3.0 3.4 .4 1.1 31 2.8 - - 35 35 1.5 .3 Second- Runoff in Month foe t-days Maximum Minimum Mean acre-feet

October ...... 37.4 6.3 0ȣ 1*21 74 November...... 41.7 ( 2.0 .9 1.39 83 December...... 46.5 1.5 92 Calendar year 1943 ...... 2,898.6 70 _ 7.94 5,750 January ...... 46.5 1.5 92 February 52.2 _ _ 1.6 104 March...... 333.1 35 l.E 10.7 661 April...... 903 56 17 30.1 1,790 May...... 2,173 127 35 70.1 4,310 June ...... 270.1 33 1.4 9.00 536 July...... 230.2 15 1.6 7.43 457 August ...... 19.7 1.7 .3 .64 September ...... 10.8 1.3 .1 .36 21 Water year 1943-44 ...... 4,164.2 127 .1 11.4 S,260 * Winter discharge measurement made on this day. a No gage-height record; discharge computed on basis of records for stations on nearby streams. 'Mote.- No e;age-height record Dec. 1 to Apr. 1 (stage-discharge relation affected by ice part of period); discharge computed on basis of 6. discharge measurements and weather records. Time basis; Mountain war time. To convert war tlffle to standard time, subtract 1 hour. SAN JUAN RIVER BASIN 259

West Mancos River near Mancos, Colo.

Location.- Water-stage recorder, lat. 37°22'30", long. 108*15'20", In sec. 14. T. 36 N., k. its W., U miles upstream from confluence with Middle Mancos River and 3* miles northeast of Mancos. Drainage area.- 42.1 square miles. Records available.- September 1910 to December 1911, April 1938 to September 1944 (no winter records 1943,. 1944). Extremes.- Maximum discharge during year, 862 eecond-feet May 15 (gage height, 4.OO feet), rrom rating curve extended above 275 second-feet; minimum dally recorded, 5.0 second- feet Sept. 23, but probably less during period of no record. 1910-11, 1938-44: Maximum discharge, 1,080 second-feet May 13, 1941 (gage height, 4.55 feet), from rating curve extended above 260 second-feet; minimum dally recorded, 2.5 second-feet Aug. 20, 1939, but probably less during period of Ice effect. Remarks.- Records fair. No diversion above station.

Discharge, in second-feet, water year October 1943 to September 1944 Das Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 9.5 11 . IS 79 237 155 27 7.8 2 S.9 10 - 22 69 210 141 26 7.4 3 9.5 11 - 34 52 194 168 25 7.4 4 8.9 11 - 51 4S 163 179 24 6.7 5 8.6 11 - 6S 69 153 137 23 6.5 6 8.6 10 _ 76 123 16S 123 &Z 7.0 7 S.6 all _ 76 175 197 105 21 7.6 8 S.6 alE _ 54 213 207 95 19 6.5 9 S.3 13 _ 44 240 240 86 24 6.5 10 S.O 11 - 41 E90 259 79 . 21 6.3 11 8.6 10 _ 51 315 253 71 18 5.9 12 10 9.S _ 56 373 216 63 16 5.7 13 S.9 9.8 _ 48 446 200 60 16 5.7 14 8.6 9.5 _ 37 511 210 57 15 5.5 15 S.3 9.2 - 30 651 219 54 14 5.9 16 S.3 9.2 _ 32 381 210 51 14 5.7 17 S.O 9.2 _ 27 293 179 49 13 5.7 18 e.o 9.5 - 27 234 192 49 13 5.7 19 16 9.5 _ 32 231 202 49 16 5.5 20 13 9.5 - 33 - 234 207 62 15 5.3 21 11 9.2 _ 26 260 213 50- 15 5.1 22 11 9.S _ 27 279 202 46 12 5.1 23 11 9.S _ 44 31S 194 44 11 5.0 24 10 9,5 _ 49 316 205 47 15 5.1 25 11 7.8 e.6 44 290 205 44 15 5.9 26 11 - 7.0 8.6 . 44 225 222 39 13 e.o VI a!2 7.4 10 48 207 169 36 11 10 28 a!2 a7.4 10 74 210 170 34 10 16 29 alS a7.0 11 60 243 168 32 9.2 16 30 16 a7.0 13 77 234 159 31 9.2 13 31 13 - 15 - 240 - 29 8.3 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 3S1.2 13 8,1 10.4 637 November...... 28S. 1 13 7.C 9.60 571 December ...... Calendar year ...... '...... ,.. - . - - - January...... February...... _ _ _ ^ Haroh 25-31...... 76.2 15 s.e 10.9 151 April...... 1,350 77 18 45.0 2,680 May...... 7,841 651 4e 253 15,550 June ...... 6,043 259 ^ 153 201 11,990 July...... 2,265 179 29 73.1 4,490 August ...... 510.7 27 8. a 16.5 1,010 September...... 215.5 16 5.C 7. IS 427 Water year ...... - - - - - a No gage-height records discharge computed on basis of weather records 'and records for on nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 260 SAN JUAN RIVER BASIN

East Mancos River near Mancos, colo.

Location.- Water-stage recorder, lat. 37°22'10", long, 108°13'35", In NEi sec. 24, Ti 36 N., R. 13 w., 800 feet upstream from mouth and 4 miles northeast of Mancos. Drainage area.- 11.1 square miles. Records available.- March 1938 to September 1944 (no winter records 1938-41, 1943-44), Extremes.- Maximum discharge during year, 1S8 second-feet May 15 (gage height, 1.37 feet}! minimum daily, 0.5 second-foot Sept. 24, but may have been less during period of no record. 1938-44: Maximum discharge, 642 second-feet May 8, 1941 "(gage height, 2.67 feet), from rating curve extended above 130 second-feet; no flow Aug. 17-27, 1939. Remarks.- Records poor. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1945 to^Septeaber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.2 l.S 1.2 ^ 9.0 19 102 21 2.S 1.4 Z 1.2 1.5 1.0 _ 10 19 95 IS 2.7 1.4 3 1.1 1.7 1.2 n 12 16 76 20 2.6 1.5 4 1.1 2.0 1.1 _ 17 IS 62 22 2.4 1.2 5 1.3 *2.3 1.0 n 20 18 57 15 2.4 l.S \ ' 76 l.S a2.3 1.0 _ 00 27 74 12 2.4 1.5 1.6 e.2.4 al.O _ 22 59 S4 10 22*1 2 1.5 8 1.6 a2.4 *al.O _ 17 43 81 S.9 1.3 9 1.6 a2.4 - _ 16 SO 90 7.1 2*62 2 1,8 10 1.5 e.2.3 - - 14 59 84 6.5 1.1 11 1.3 a2.3 ^ 14 65 84 7.4 2.1 1-1 iZ 1.3 a2_.3 - _ IS 75 74 6.S 2.0 1.1 13 1.2 , a2.2 _ _ IS 92 65 5.6 1.8 1.1 14 l.S a2.2 _ « 13 97 63 5.9 1.5 1.1 15 1.8 2.0 - - 12 113 62 4.S 1.4 1.6 16 1.8 1.8 _ _ 11 90 59 4.4' ' 1.4 - 1.5 17 1.5 1.8 .. _ 10 76 50 4.4 1,3 1.4 18 1.6 2.0 .. ~ _ 10 60 52 4.8 1.4 1.4 19 3.0 1.8 _ _ 9.5 63 53 5.6 B.7 1-.4' 20 2.2 1.8 - - 9.5 70 55 7.1 2.1 1.3 21 2.1 1.7 _ 9.5 73 62 5.9 2.0 1.1 22 2.0 1.8 _ _ 11 79 46 5.3 1.6 .8 23 1.5 1.7 - _ 12 97 43 5.1 l.S .7 24 1.1 l.S _ *a3.5 13 102 46 5.1 2,£ .5 25 1.1 1.3 - 3.0 13 97 -40 4.S 2.8 l.S 26 1.2 1.3 _ 3.0 12 86 43 4.4 E.O 6.8 27 1.3 1.2 _ 3.0 13 93 36 4.2 l.S 3.g 28 a2.4 1.2 - 3.S 16 95 32 3.9 1.6 3.6 29 a4.0 1.3 - 3.S 15 110 30 3.7 i.a 3.*, 30 5.4 1.2 _ S.I 19 102 24 3.2 1.8 2.8 31 2.0 - - 6.6 - 108 3.0 1.6 Seoond- Runoff is Month fcot-days Maxiimn Minimal Mean aore-feet

October...... S3. 6 4.0 1.3 I*y3 106 Novenbor ...... 55.2 2«4 l.S 1*84 109 December 1-8 ...... S.5 1^2 l.C 1.06 17 Calendar year ...... _ _ _ _ _ January...... ~ ~ February...... 2 ^ March 24-31...... Q-L.Q *! fl 6.6 3.C 3*98 63 April...... 411.5 gg IS*9.1 13.7 S16 May...... 2,148 113 69.3 4,260 June...... I r 811 102 24 60.4 3,590 July...... 245.6 22 3.C 7.92 487 August ...... 62*6 2 oO 1.! 2.02 124 September...... 46.3 3.5 .£ 1.54 92 Rater year ...... - - - - - * Winter discharge -measurement made on this day. a Ho gage-height record; discharge computed en basis of 2 discharge measurements, weather records, and records for stations an nearby streams. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. SAN JlttN 261

Middle Mancos River' near Mancos, Colo. » Location.- Water-stage recorder, 1st. 37°22'15", long. 108e13'35s , In SEi sec. IS, T. 36 N., L Rj 13 W., 1,300 feet upstream from East Bincos River and 4 miles northeast of Mancos. Drainage area.- 13.7 square miles, Records available.- March 1938 to May 1941, October 1941 to September'1944 (no winter recoros x&te, J-941, 1943). Extremes.- Maximum discharge during year, 297 second-feet May 15 (gage height, 2.38 feet), "jrrojn rating curve extended above 78 second-feet; minimum dally, 0.1 second-foot Oct. 23-25. Sent..24. 1938-14: Maximum discharge, that of my 15, 1944; no flow at times. In 1939, 1942-43. Reaarfcs.- Records fair except those for period of no gage-height record, which are poor. Tnree small diversions above station for' irrigation.

Discharge-, in second-feat, water year October 1948 to September 1944 Dag Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 0.2 1.0 . 4.O £2 65 7.5 1.7 1.1 2J ,2 .9 4.8 21 54 7,2 1.8 1.1 3 .4 1.1 5.0 16 51 11- 1.6 .9 4 .3 . 1.1 6.0 20 41 12 1.5 .7 6 .4 ' «1.1 8.0 29 38 9.1 1.7 .8 " 6 .7 .7 9.7 48 43 S.1 1.9 .9 t .4 .8 9.0 . 59 48 7.0 1.8 .8 8 .4 .S (*) o.e 7.8 65 44 5.5 1.9 .8 a ,4 .8 7.2 83 45 4.6 8.8 .8 . M 2 .6 6.4 90 48 3.4 2.0 .6 11 .4 .7 8.6 100 47 2.7 1.7 ,6 12 .8 .6 11 103. 41 2.4 1.6 .6 15 .5 .5 10 al25 37 1.1 1.4 .6 14 .6 .3 7.8 146 S3 .5 1.4 .5 16 .S .4 8.6 176 32 .3 i.X j.6 ' , 0.5 0.5 ' 0.~6 16 .S .4 .8 7.8 139 28 .2 .8 .6 17 1.0 .5 .8 6.4 107 81 ,5 .8 «6 18 1.0 .5 #8 6.4 96 20 3.4 ,S .5 19 1.5 .6 1.0 6.9 101 17 4.6 1.6 .4 20 1.0 .6 1.0 7.5 107 16 5.5 l.S .2 '.6 .2' 21 .5 1.0 6.6 99 14 5,0 1.2 22 .Z .5 1.0 .8.0 107 14 3.2 1.1 .3 23 .1 .5 1.0 10 132 12 3.4 1.1 .2 24 .1 .4 1.0 11 184 12 3,9 1.6 .1 25 .1 .4 1.0 11 109 11 3.1 2,0 .2 26 .2 .3 1.0 10 70 12 2.8 1.9 .3 27 .4 .3 1.0 18 68 11 2.4 1.7 .3 28 .5 .3 2.0 18 61 9.5 2.2 1.6 .3 29 2.0 .3 2.5 16 70 8.8 2.0 1.5 .2 30 1.4 .3 - 3.0 22 70 9.1 1.8 1.6 .2 31 1.2 ~ - 3.5 70 " 1.8 1.2 - Seoond- Roaof f in Month foot-days Maximum Minimum Mean acre-feet

A October 18.8 2 »U 0.1 0.61 37 Hovember...... 17.8" 1.1 .3 .59 35 December...... 15.6 .5 SI

Calendar year ...... - _ _ January...... 15.5 .5 31 February ...... i *rr '<*A. _ _ .6 35 March...... 3lU 3.5 _ 1.01 62 April...... 272.6 22 4.0 9.09 541 2,634 176 18 86.0 5,220 June ...... 882.4 65 8.8 29.4 1,750 July...... 128;0 12 .2 4.13 254 August...... 46.9 Q g .8 1.51 93 September...... 16.0 1.1 .1 .53 32 Water year 1943-44 ...... 4,096.3 175 .1 11.2 8,180 » Winter discharge measurement made on this day. a Ho gage-height record; discharge Interpolated. Seta*.- Ho gage-height record Dot, 28, 29, Boy. 6-13, Hov. 18 to Apr. 6 {stage-discharge relation refords? * m°St °f l*rtod> » discharge computed on basis of 3 discharge aJLureme^tf and weaker Tiae basis; Mountain war time. To convert war time to standard tiae, subtract 1 hour. 262 PARIA RIVER BASIN

Paria River at Lees Ferry, Aria.

Location.- Water-stage recorder, lat. 36052'15", long. 111 036'30B , In NWjNEi sec. 13, T. 40 N., R. 7 E., half a mile upstream from mouth and 1 mile northwest of Lees Ferry. Datum of gage is 3,123.4 feet above mean sea level, datum of 1929. Drainage area.- 1,570 square miles. Records available.- October 1923 to September 1944. Records.of monthly discharge prior to octooer laaa republished, with some additions, in Water-supply Paper 918. Average dlscharge.- 21 years, 35.0 second-feet. Extremes.- Maximum discharge during year, 8,400 second-feet Oct. 19 (gage height, 12.1 reet) Dy computation of difference in flow of Colorado River above and below mouth of Earia River; minimum, 2.1 second-feet Aug. 1, 2. 1923-44: Ifeximum discharge, 16,100 second-feet Oct. 5, 1925 (gage height, 17.5 feet), by float-area method; no flow during several periods in December and January of many years. Remarks.- Records ;ood except those for periods of Ice effect, no gage-height record, or uiose above 100 second-feet, which are poor. Diversions above, station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 28 14 alO 25 23 2S 37 82 14 3.4 2.6 3.6 2 20 13 alO 16 33 30 40 58 11 4.4 2.6 3.4 3 19 13 alO 14 29 43 36 46 10 4.7 2.4 3.6 4 IS 13 alO 21 23 79 34 31 35 3.S 2.6 3.6 5 18 13 alO 15 31 70 34 27 21 3.S 2.4 3.6 6 17 12 a20 9 36 95 37 28 12 3.8 2 .S 3 «6 7 14 14 34 b9 35 38 34 28 7.9 3.0 2.8 3.6 8 12 11 24 b8 40 27 30 27 5.3 2.6 3.0 3.6 9 11 10 21 be 62 2S 36 27 4.0 2.2 3.6 3.6 10 10 14 29 bS 54 67 36 24 3.4 2.6 2.B 3.4 11 11 16 25 10 30 277 22 18 3.2 2.6 3.0 1?. 12 16 21 12 15 305 27 15 3.4 2.6 2.6 3.8 13 12 16 2S blO 19 318 35 12 3.2 2.8 2.3 3.6 14 12 16 27 bll 16 261 43 11 3.2 2.8 2.8 3.8 IS 12 15 19 bll 16 120 24 9.4 3.2 3.0 14 ' 4.0 16 12 15 26 b!3 20 41 19 7.4 3.0 3.2 6.6 3.8 17 11 15 25 b!2 20 42 22 7.0 3.4 3.2 3.S 4.0 18 15 15 15 bll 24 102 19 7.4 3.4 3.6 3.4 3.8 19 1,740 16 19 b!2 20 6B 17 7.0 3.0 3.4 3.4 3.6 20 170 16 33 b!2 20 52 23 7.4 2.8 3.6 25 3 »6 21 43 15 35 b!2 24 44 40 11.0 2.S 4.2 30 3.6 22 88 18 47 blS 31 23 29 7.9 3.0 4.2 14 4.0 23 23 33 36 25 24 19 18 5.6 3.4 4.7 9.4 3.8 24 19 3S 32 33 26 43 18 5.3 3.0 4.2 5.3 3.8 25 IS 20 27 43 76 73 20 4.7 3.2 3.4 4.0 3.8 26 16 IS 26 31 45 53 22 4.4 33 3.4 3.4 4.2 27 16 16 IS 25 27 41 22 4.0 18 3.0 3.4 11 28 15 a!4 13 22 31 26 29 4.2 9.4 2.S 3.6 12 29 16 a!2 10 15 32 17 51 4.2 5.0 3.0 3.4 15 30 15 alO 15 11 IS 67 7.1 3.8 2.6 3.2 18 31 14 - ZZ 19 - . 26 * 5.9 - 2.4 3.6 - Second- Runoff in Month foot-days Maximum Minimum Mean aore-fest

2 397 77 3 November December...... 697 47 10 22.5 1,380 Calendar year 1943 ...... 11,004 1,740 2 30.1 21,800 994 March ...... 2 474 April ...... 921 30 7 May...... 54T 9 2 2 September...... 152.4 18 3.4 5. OS 302 Water year 1943-44 ...... 9,560.6 1,740 2.2 26.1 18,960 a Ho gage-height record; discharge computed on basis of recorded range In stage, weather records, and records for Moenkopi Wash near Tuba and Virgin River near Llttlefleld. b Stage-discharge relation affected by Ice. Time basis; Mountain war time to Dec. 31, 1943J mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. LITTLE COLORADO RIVER BASIN 863

Little Colorado River above Lyman Reservoir, near St. Johns, Arlz,

Location.-- Water-stage recorder, lat. 34°20', long. 109°22', In NEiSEi sec. 27, T. 11 N., R. 28 E., 1 mile downstream from Coyote Creek, 4i miles upstream from Lyman Dam, and 13 miles south of St. Johns. Dratnage area.- 747 square miles. Records available.- April 1940 to September 1944. Extremes.- ffexlmum dlecharge during y%ar, 3,400 second-feet Aug. 15 (gage height, 9.57 reet); minimum dally, 0.5 second-foot Aug. 3-6. 1940-44: mximum discharge, 16,000 second-feet July 25, 1940 (gage height, L7.1 feet, from floodmarVs) by slope-area method; minimum, 0.3 second-foot Sept. 21, 1942. Remarks.- Records good except those for periods of Ice effect or unstable stage-dls- charge relation, which are fair, or those for periods of no gage-height record, which are poor. Flow regulated by many small reservoirs; total capacity, about 16,000 acre-feet. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 2 5 b? OT 7 8 12 13 10 2 1 3 2 2 5 b7 b7 7 8 31 13 12 2 .5 2 3 2 6 bS b8 8 50 12 U 2 .5 1 4 2 7 *b6 b8 7 S 70 11 10 1 .E 2 .5 2 7 b6 b7 7 S 81 10 8 2 .5 1 6 2 6 7 b7 7 S 92 9 7 2 .5 1 7 2 bS 6 b8 7 b7 86 " 75 6 2 3 1 2 be 6 b7 7 b7 659 8 3 3 § 2 be 6 b7 *7 b7 645 6 a a 3 1 10 2 5 6 b7 7 8 641 7 2 2 2 1 11 3 3 '7 b7 b? 8 e41 6 3 2 2 1 12 3 3 7 »b7 b7 S e54 S 3 a 2 1 13 3 »3 7 b7 b7 e e70 9 3 2 2 2 14 3 5- 7 b7 s eS6 10 3 2 4 a 18 4 5 7 b7 b8 7 652 8 4 2 247 2 16 4 5 7 b7 9 7 eSO 5 4 1 a80 2 17 5 S 7 b7 b9 7 e39 11 4 1 alO Z 18 ' 5 9 b7 b7 b9 9 34 13 3 1 a7 ' B 19 5 9 S V bS 9 38 12 4 2 6 1 20 5 9 S V7 b8 8 31 14 4 3 a6 2 21 4 8 8 07 9 12 30 15 4 3 aS 1 22 4 S 8 07 b8 8 20 17 4 2 aS 1 23 4 8 b7 8 9 a 20 17 4 3 205 1 24 5 S 7 S 9 8 16 12 3 33 aSO 2 25 5 7 b7 7 9 e 13 10 3 8 a8 5 26 5 7 b8 b7 9 8 14 12 3 4 a7 5 27 5 6 b7 b7 9 8 11 15 a 2 a7 4 28 5 W b7 b8 8 9 14 16 a 2 6 8 29 S b7 b7 be S 13 12 16 2 1 6 11 30 S b7 07 b8 _ IS 12 15 2 1 5 10 31 S " b7 7 - 11 " 11 ~ 1 * - Seoond- Runoff in Month foot-days Maxima Miniau* Mean acre- feet S22 October 2 3.6 6.2 Deoeaber...... 215 8 6 6.9 426 Calendar year 1943 ...... 5,085 226 1 13.9 10,090 8 7 7.3 446 227 9 7 7.S 450 264 15 7 8.S 524 1,193 92 11 39.6 2,370 345 17 5 11.1 684 JUC9 12 2 4.5 268 08 33 1 3.2 194 667.5 247 .£ 21.5 - 1,320 September...... 80 11 1 2.7 * 159 Water year 1943-44 ...... 3,747.5 847 »' 10.2 7,430 * Winter discharge maaureaent made on this day. a Ho gage-height reoordj discharge computed on basis of typical recession curve for simmer flood b Stage-discharge relation affected by lee. e Stage-discharge relation unstable. Tlae baaIs I Mountain war time to Dee. 31, 19431 Bountaln standard time thereafter. To convert war time to standard tine, subtract 1 hour. 264 LITTLE COLORADO RIVER B«BIN

Lynan Reservoir near St. Johns, Arlz.

Location.- Water-stage recorder, lat. 34*22', long. 109°23', In HEi sec. 9, T. II T*., R. 38 E., In control tower of Lynsn Dam on Little Colorado River, 9 1/3 miles south of St. Johns. Drainage area.- 790 square miles. \ Records available.- May 1940 to September 1944. Eictreaies.- Haxlmum contents during year, 5,610 acre-feet May 4, 5 Jimg/s height, 32.00 feet); minimum, -285 acre-feet Sept. 22 (gage height, 18.99 feet)-; no storage available for Lyman Canal Sept. 11-30. 1940-44: Maximum contents, 25,500 acre-feet May 25-31, 1941 (gage height, 58.80 feet); minimum, that of Sept. 22, 1944. Remarks.- Reservoir is formed by an earth.-and rock-fill dam, rubble faced; dam ctnspieted ami storage began In 1920; original dam washed out Apr. 14, 1915. Capacity, 21,900 acre-feet between gage heights 20.0 feet (bottom of Lyman Canal, revised) and 50.0 feet (average elevation of permanent spillway crest). Capacity at top of wooden 4am on spillway, 28,500 acre-feet at gage height 55 feet. No spill occurred this year.. - Contents between 2.0 feet (sill of outlet gates) and 20.0 feet, 4,500 acre-feet (baaed on survey In 1920), not available for release to Lyman Canal but can be, released to river channel, positive figures given herein are contents above gage height 20.0 feet;.negative figures are contents below gage height 20.0 feet (bottom of Lymaa Canal). Water used for Irrigation in vicinity of St. Johns.

Conteivts at 18 p.m.. In acre-feet, water year October 1943 to September 1044 D*9 Oct. Nov. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept.

I 2,080 2,020 2,240 2,660 3,100 3,450 3,760 8,600 4,320 2,190 604 467 a 2,020 2,020 2,260 2,680 3,100 3,480 3,600 5,600 4, £60 8,160 662 418 s 8,020 8,020 2,270 2,7OO 3,120 3,460 3,880 5,600 4,180 2,120 601 366 4 8,01O 2,030 2,280 2,720 3,130 3,460 3,980 5,610 4,040 2,080 480 332 S - 2.010 8,030 2,300 2,720 3,140 3,470 4,130 5,610 3.900 2,030 416 288 0 8,010 2,030 2,300 2,740 3,150 3,480 4,300 5,600 3,790 1,980 366 238 T 8,010 8,040 2,310 2,760 3,160 3,490 4,460 5,690 3,710 1,980 316 186 8 8,010 2,040 2,330 2,760 S, ISO 3,490 4,600 6,680 3,630 1,860 866 184 9 2,000 2,050 2,350 2,780 3,190 3,500 4,640 5,680 3,820 1,780 233 76 >* 2,000 2,050 2,560 2,786 3,800 3,610 4,720 5,680 3,440 1,740 201 14 U. 1,990 2,060 2,370 2,800 3,210 3,810 4,760 5,880 3,360 1,670 186 -63 12 1,990 2,060 2,390 2,610 8,220 3,{io 4,840 5,580 3,880 1,630 163 -120 13 1,990 8,060 2,400 8,400 3,240 3,530 5,080 5,640 3,200 1,690 122 -184 14 1,990 2,060 2,420 2,640 3,240 3,630 5,110 5,480 3,130 1,530 416 -839 IS 1,990 8,060 2,430 2,840 3,250 3,540 5*190 5,480 3,080 1,490 388 -258 16 1,990 2,070 2,440 2,860 3,270 3,660 5,260 5,486" $,000 1,430 786 868 17 1,990 2,080 2,450 2,870 3,260 3,560 5,920 5,880 2,930 1,370 767 -SCO 18 1,990 2,090 2,470 2,890 3,300 3,880 5,380 6,3gO 2,880 1.S90 7BJ . -S96 19 1,990 2,100 2,480 2,900 3,310 3,690 5,420 5,220 a, aso 1,B70 622 -268 20 1,990 2,120 2,510 2,920 3,320 3,630 5,450 5,190 S,78Q 1,810 662 -*« 21 1,990 2,120 2,520 2^940 3,340 3,640 5,490 6,080 2,790 1,1TO 618 -879 22 1,990 £,130 2,540 2,950 3,340 3, ,660 8,510 4,980 2,660 1,11? SP -285 23 1,990 2,180 2,566 2,960 3,360 3,«70 5,540 4,900 2,600 1,060 Tie -282 24 S.OOQ 2,160 2,570 8,960 3,380 3,670 5,850 4,840 2,630 1,030 604 -«8J» 25 8,000 8,170 2,580 3,000 3,390 3,680 5,860 4,780 2,480 992 804 -2§6 _.-. te6> -*4#-f «28 < 8,000 2,180 2,600 3,02O 3,400 3,680 5,560 4,720 2,410 --«**,/ ~ 2,000 8,190 2,610 3,020 3,410 5,680 5,660 4,660 2,540 ,898. 2MO 2,210 8,620 5,040 3,420 3,690 5,560 4,600 8,300- 88fr , 648 8*010 2,210 8,640 3,060 3,430 35,700 5,580 4,660 2,280 1ST 685 3,010 S,E30 2,640 3,060 _ 3,980 6,890 4,480 2,830 nn 562 - - ess- M:, -' -;-- . .» * f 8,080 2,660 5,080 - 3,740 4,420 § Monthly gage height and aonteuts, water year October 1943 to September 1944 Change la contents Date Gage height Contents during nohth TfsetTf (acre- feet) (aere-fwt) ; '"- Sept. 30...... 86.39 8,030 Oct. 31...... 25.37 2,020 -10 ' Mr. so.,,,...,...... 86.84 2,830 *«$- * Dec. St...... 86.76 , 8,660 +480 Calendar year 1943.. - - -5,410

28.88 31 97

-1^70 19 4S -640 Water year 1943-44. . - - -2,190 at midnight. " Release to river channel lowered reservoir below botton of Lyaen Canal. JIme basist Mountain war time to Dec. 31, 1943f mountain standard tiJ» thereafter.To convert war time to standard time, subtract 1 hour. COLORADO RI7BR BASIN 265

Little Colorado River below Lyman Reservoir, near St. Johns, Arlz.

Location.- Water-stage recorder and concrete control, lat. 34°23', long. 109*23', m NEi sec. 9, T, 11 N., R. 28 E., 65 feet downstream from outlet tunnel In Lysan Dam and 9 1/3 miles aouth of St. Johns, used to determine water released to river channel. Mater-stage recorder on Lyoan Reservoir, 300 feet upstream In control tower oa Lyraan Daa, used to determine water spilled three-eighths of a mile north at spillway in SWt aec. 4, T. 11 N., R. 28 E. Drainage area.- 790 square miles. Records available.- April 1941 to September-1944. ' - - Extremes (retaliated).- Jfexlmum discharge during year, 18 second-feet Sept. 15: no flow at ,tifes except for negligible leakage amounting to less than 0.1 second-foot. -1941-44: Jfexlman discharge observed, 603 aecond-feet my 8, 1941 < including 546 second-feet of spilled waterjt no flow at times except for negligible .leakage amount­ ing to less than 0.05 second-foot. Renflartes..-.Records good except those^below 1 second-foot, which are fair. ciscfaarge cost- - pietely regulated by tyaan Reservoir (see preceding page}. No spUl occurred 'this year* Since 1989 spill has occurred only during periods Apr. 8 to about May. Q, 1930, . and Apr. 3a to May 13, 1941, Record shows all. water spilled, ana released from'Lyran Reservoir to river channel but does not include flow diverted to Lyman Canal.

Discharge, to second-feet, water year October 1943 to September 1944 Day Oct. HOT. Dec. Jan. Feb. Bar. Apr. Hay June July Aug. Sept. O.B" 1 0.4 , o.l 0.1 0.1 0.1 Oiifi. 9.3 . 0.6 0.8 1.8 2 .S .1 .8 .1 .1 .e, .S .6 ' 3 3 ft 4 .1 .1 .1 .8 .1 ,1 3.8 9.S .6 .9 .5 5 6 .1 .8 , .1 .1 .2 . , 4.4 .6 1.3 .5 7 .1 !i Ie .£ .1 .1 .2 8.S .e 3.6 7.3 .2 13 ' 9 .1 .1 .2 .2 .1 .1. ,2 3.3 8.6 .6 3.5 10 .2 , 14 11 .1 .1 .8 .2 .1 .1 .8 4.1 8.8 .6 2.9 14 % -. 12 2,9' 13 .2 4: '.Z .8 .1 .1 '.S 4.1 6.7 -!! v 14 . -1 .8 .1 .1 4.1 5.3 ^6 8.6 14 15 Is .8 .8 .1 .1 4.4 4.1 5.3 .6 2.2 5.0 16 .2 , .2 .2 .1 ,1 6.2 4,1 5.0 ,6 3.5 .2 17 .S '.1 .6 .2 .1 .1 6.2 7.0 4.7 .6 4.7 .2 .2 .2 ^8 .1 .1 6.8 8.8 4.7 .6 7.S .1 11 .2- .1 .1 6.6 S.8 4.7 .6 7.5 ,1 20 ^2 IB 1. .1 5.9 S.S 4.7 .6 7.6 6.9 9.8 4.7 .6 4.5 .1 .8-'.8 -.8.8 .s 'l .1 '.1 1 . .1 -6.8 6.8 4.7 .6 8.5 .23 .2 ! .8 ts' 1 .1 6.2 8.8 2.7 6 2.5 .1 'II .2 .1 .1 ' 6.9 S.S .7 3.9 4.5 .2 ' .2 .1 5.9 S.S .7 3.5 6.9 .2 .1 , - .2 .1 5.9 6.8 .7 .9 10 .e 87 . .1 ' .8 II .1 ^ tl S.6 9.2 .7 .9 7.0 .2 . 28 '.*'^2 .2 .1; *1 .1 6.6 9.8 .6 .9 5.9 .2 , 29. .e ' .1 4.2 9.2 .6 .9 4.1 .2 ll .8 3.8 9.2 .6 .8 3.8 .2 It .1 la .2 9.8 3.6 Ranpff in Month SS&- ***» m**m Mean ao re-feet

Octobar. 4.8 - 0.4 o.l 0.15 9.5 rtaar...... 3.3 . .2 .1 .11 6.5 Krtwr ...... 6.8 .2 .1 .19 12 oa lepdar year 1943 ...... A ...... 1,047.«. 14 0 2.87 2,060 (J*na . .Z .1 .13 11 .1 .1 .10 5.8- £a£o _ .2 .1 .11 e.s 1, ...... _.«. 6,6 .1 3.11 186 S£ J?;'., : ' - 9.2 3.3 6.31 388 jSL 1^.8 :. , 9.2 .6 5.53 389 26.4 3.9 .6 > .85 58 «*.,...... 116.8' 10 .8 3.77 832 sept 1U.6 14 .1 3.72 221 later year 1943-44 ...... 735.1 14 .1 2.01 1,460 Mae' baa la ; Hoioitain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. OToe60o-«-i8 266 LITTLE COLORADO RIVER BASIN

Little Colorado River above Zunl River, near Hunt, A.ri2.

Location.- Water-stage recorder, lat. 34°38', long. 109°40', In SWiSWi sec. 2, T. 14 N., R. 25 E., 500 feet upstream from Zunl River and 3 miles northwest of Hunt. Drainage area.- 3,680 square miles (Including 830 square miles- In closed basin surround­ ing Quemado, N. Hex.). Records available.- March 1940 to September 1944. Extremes.- Maximum discharge during year, 101 second-feet Sept. 26 (gage height, 2.36 feet); no flow much of year. 1940-44: Maximum discharge, 577 second-feet July'26, 1940 (gage height, 3.46 feet); no flow during long periods in many years. Remarks.- Records fair except those prior to Apr. 1, which are poor. Diversions above station for Irrigation. Some regulation by many reservoirs above station, the largest of which is Lyman Reservoir (see p. 264).

Discharge, in aecond-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 0.1 0.2 0 3 0.5 0 0 0.1 2 0 0 .1 .2 2 .4 0 0 0 3 0 0 .1 .2 3 .4 0 0 .2 4 0 0 .1 .2 3 .3 0 0 .2 5 0 .1 .1 .2 2 .2 0 0 0 6 0 .1 0 .S 2 O 0 0 0 7 0 .1 .1 .3 S 0 0 0 0 ft 0 .1 0 .6 S 0 0 0 0 9 0 .1 0 .3 2 0 0 .1 0 10 0 .1 0 .2 2 .1 0 0 .2 11 0 .1 0 .2 2 2 0 0 . .1 12 0 .1 0 .3 2 2 0 0 0 1,1 0 .1 .1 .3 2 2 0 .1 0 14 0 .1 .1 .2 S 4 0 .2 0 15 0 .1 .1 .2 3 3 0 0 .1 16 0 .1 .1 .8 1 3 .1 0 0 .2 IT 0 .1 .1 .6 6 0 0 0 .1 1ft 0 .1 .1 1-.0 2 0 0 0 .6 .5 19 1.0 .1 b.l .6 2 0 0 0 .2 .2 20 0 .1 b.l .2 1 3 0 0 2.2 0 21 0 .1 b.2 .3 1 5 0 0 3,0 .1 22 0 .1 b.2 .3 1 7 0 0 1,3 .3 0 .1 b.2 .3 1 5 .6 0 .7 .3 24 0 .1 .2 .6 1 2 .8 .1 .8 .1 25 0 .1 .2 .2 1 0 .5 .3 .8 .1 0 .1 .2 .3 S .2 0 .7 20 zr 0 .1 .2 1.6 9 .1 0 .S 35 0 .1 .2 1.0 8 0 0 .7 3.0 0 .1 .2 .8 S 0 0 1.0 2.4 0 .1 .2 - 7 0 0 .7 2.2 31 0 .1 .2 - 6 - 0 .2 - Seoond- Runoff in Month foot-dayS4 Maximum Minimum Mean ao re-feet 1.0 1.0 0 0.03 2^0 0 0 0 0 0 December...... 2.7 .1 0 .09 5.4 Calendar year 1943 ...... 9.6 2 0 ,03 19 3.6 .2 .12 7.1 12.4 1.6 .1 .43 25 22.1 2.0 .2 .71 44 April ...... 5.5 .8 0 .IS 11 May...... 0 0 0 0 0 0 0 0 0 0 July...... _ . . - . .4 .3 0 .01 8 Augu 14.1 3.0 0' .45 26 September...... 65.4 35 0 2.18 130 Water year 1343-44 ...... 127.8 35 0 .35 253 b Stage-discharge relation affected by ice. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To ar time to standard time, subtract 1 hour. LITTLE COLORADO RIVER BASIN 267

Little Colorado River near Hunt, Aria.

Location.- Water-stage recorder, lat. 34°39', long. 109°42', in NWiNWi sec. 4, T. 14 N., RT"25~E., at bridge on U. S. Highway 260, 2 miles downstream from Zuni River and 5 miles northwest of Hunt. Drainage area.- 6,280 square miles (including 830 square miles in closed basin surround- ing cjuemaao, N. Mex., and excluding 964 square miles in North Plains Basin, N. Max., a closed basin). Records available.- May 1929 to October 1933, larch 1940 to September 1944. Extremes.- Maximum discharge during year, 451 second-feet Sept. 30 (gage height, 7.51 reet;; no flow on many days. 1929-33, 1940-44: Maximum discharge, 8,000 second-feet July 28, 1929 (gage height, 19.0 feet, datum then in use); no flow at times in various years. Remarks.- Records fair. Diversions above station for irrigation. Some regulation by many reservoirs above station. Zuni River contributes practically all inflow between this station and station above Zuni River, near Hunt.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.9 aO.2 0.4 bfl.7 0.3 1.2 0.4 0 0 0 ao.8 0.3 2 .4 a. 2 b.4 .9 .2 .7 .4 0 0 o, a 7 .1 3 .3 b.4 .9 .2 .6 .4 0 .1 0 a. 6 0 4 .3 a. 2 b.3 .9 .2 .6 .3 0 .1 ,1 a. 5 .3 5 .2 a. 2 .8 .9 .2 .6 .2 0 .1 .1 .1 6 .2 a. 2 .9 .9 .2 .3 .2 0 .1 .1 0 7 .2 a. 2 .9 .9 .5 .3 .1 0 0 0 0 8 .2 a. 2 .9 b.6 .6 .3 .2 0 0 .1 a. 3 0 9 .1 1.2 .6 .5 .3 .2 .1 0 .1 .3 0 10 .1 a. 2 1.2 .5 .2 .4 .9 .2 .1 .1 .3 0 11 .1 a. 2 1.1 .5 .2 .3 2.8 .1 .1 .1 .4 .2 H2 a 2 1 2 0 13 .1 .2 1.3 .4 .2 .2 .s .1 .1 .1 .3 0 14 .1 .1 ' 1.3 b.4 .3 .2 1.7 .1 .1 .1 .3 0 15 .1 g .1 16 .1 .1 .9 b.4 .6 2.0 .9 .1 .1 .2 .2 2 17 .1 .2 .9 .4 .7 1.0 .2 .1 .2 .1 .2 2 18 g g g 2 19 12 .2 1.0 .6 .9 2.2 .1 .1 .2 .2 .7 4 20 .3 .2 1.0 .8 .5 1.6 .2 .1 .1 .2 1.0 2 2- 21 .3 .2 1.1 .9 .6 1.9 .1 .2 .1 .2 3.0 22 .2 .2 1.3 1.0 .5 4.6 0 .2 .1 .5 1.5 2 23 .1 .2 1.0 1.2 .6 . 2.0 .3 .2 .1 .5 .8 4 24 .1 .3 1.0 1.3 .7 1.3 1.2 .1 .1 3.3 .S 3 25 .1 .2 1.2 .7 .7 1.0 .6 .1 .1 1.0 .8 2 26 .1 .2 .9 .5 .7 .8 .2 .1 0 .4 .7 56 27 .1 .2 bl.3 .5 1.3 .6 .1 .1 0 .4 .7 SO 28 .1 .2 bl.O .4 4.4 .6 .1 .1 0 17".3 .8 77 29 8.6 .2 bl.O .5 2.5 .6 0 .1 0 .7 70 30 a. 6 .3 b.8 .3 .8 0 .1 0 2.S .9 170 31 a. 9 b.9 .3 .5 0 al.S .5 Second- Runoff in Month f dot-days Maximum Minimum Mean ao re-feet Ooto ber...... 26.5 12 0.1 0.85 63 Hove rt»r...... 5.9 .3 .1 .20 12 Oeoert»r...... 29.4 1.3 .3 .95 58 Calendar year 1943 489.9 115 0 1.34 972 Janu ary 20.1 1.3 .3 .65 40 Febr 19.9 4.4 .2 .69 39 Marc 29.9 4.6 * .2 .96 59 Apri1...... 15.1 2.S 0 .50 SO 2.7 .2 0 .09 5.4 June 2.3 .2 0 .OS 4.6 July 30.0 17 0 .97 60 Augu 19.6 3.0 .2 .63 39 September ...... 456.6 170 0 15.2 906 Bater year 1943-44 ...... 658.0 170 0 l.SO 1,310 a Ho gage-height record; discharge computed on basis of weather records, probable shape of re­ cession curve, -and records for Little Colorado River near Woodruff and Silver Creek near Woodruff. b Stage-discharge relation affected by ice. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 888 UtTLE COLORADO RIVER BASIS Little Colorado River near Woodruff, Arlz.

Location.- Water-stage recorder and concrete control, lat. 34°48', long'. 110903', in sec. 7, T. 16 N., R. 22 E. , 14 miles northwest of Woodruff and 4 -miles downstream frost Silver Creek. Datum of gage is 5,123.5 feet above mean sea level (from river- profile map, based on general adjustment of 1929). Drainage area.- 8,100 square Wiles. Records available.- March 1905 to December 1908, December 1915 to December 1919 irragmentaryj, April 1929 to December 193S, September 1935 to September 1944. Average discharge.- 13 years (1929-33, 1935-44), 63.7 second-feet. ESctreffles.- Maximum discharge during year, 1,140 secontWfeet Sept. 28 (gage height, 3.70 - reet;;: no flow several periods during summer months. < 1929-44: Maximum discharge, 13,000 second-feet July 26, 1940; no flow on SOBS days In spring or summer of most years. Maximum discharge recorded, 25,000 second-feet Dec. 5, 1919 (gage height. -12.0 feet, datum then in use), from rating curve extended above 2,000 second-feet; maxlmm gage height recorded, 12.7 feet, datum then In use, Jan. 19, 1916 (discharge not determined) . Remarks.- Records good except those for periods of Ice effect, which are fair. Diversions uaoove station for irrigation. Some regulation by reservoirs above station (combined capacity, about 85,000 acre-feeti revised; previously published ftgure of 67,OOQ did not Include about 21,000 acre-feet In reservoirs in Zunl River Basin in New Mexico).

Discharge, in second-feat, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. ay June July Aug. sept. 1 12 S b4 blO 16 13 7 S 0.7 0 1 3 2 10 7 b4 blO 17 11 5 3 .1 9 .4 2 3 10 7 b4 bl2 16 *0 10 3 .3 8 0 2 4 10 7 4 bU IS 11 , 21 3 .7 2 0 1 5 9 7 4 bl4 IS S 21 3 .3, .7 0 .S 6 10 6 6 b!2 17 12 19 1 .2 .5 0 ..8 7 9 6 6 b!3 19 25 16 .8 0 .6 0 .S 8 S 6 6 blO 22 14 10 3 0 .5 0 1 9 6 6 6 blO 21 10 13 3 .6 62 0 1 10 5 6 6 blO 21 8 10 e 0 20 22 3 11 t 6 7 blO 17 7 9 3 0 3 6 4 12 6 6 9 blS 13 135 6 2 .9 1 1 3 IS 6 6 7 . bll 13 196 39 3 1 .9 .f 3 14 5 6 7 blO IS 246 27 2 2 .5 .6 3 15 5 6 7 b8 12 216 38 .6 _ 1 .4 .0 4 ' 12 '' 30 16 5 6 7 b9 125 .2 .e . .7 26 6 17 5 6 7 blO 12 150 23 0 .s .6 10 6 18 & 5 9 bll 12 288 25 0 .1 .8 . 80 3 19 157 5 10 b!2 12 165 21 .7 0 & 94 - 3 20 76 6 9 bll 10 163 15 .9 0 77 142 3 21 21 5 10 blO 11 120 10 .8 0 38 27 4 22 9 6 10 11 11 53 6 .5 0 31 8 3 23 6 e 10 12 11 3S "96 .5 0 11 5 3 24 6 S 9 18 11 22 .3 0 12 16 2 25 5 5 9 29 - 10 123 S 1 0 48 158 9 26 5 4 9 19 10 133 6 1 0 20 41 173 27 5 4 blO 18 12 88 4 .9 0 9 S -564s 28 7 b4 blO 15 16 45 4 .9 .1 3 10 4W5J 29 S M bis 17 15 25 32 .9 .1 2 8 SfflK 30 6 b4 b!5 18 - 17 23 .5 0 1 4 162 31 10 ~ bll 19 ~ 10 " .7 - 3 4 " Seoond- Runoff in Month foot-days NaxiBUB IHniaim Mean aore-fe«t

October...... 454 157 6 14.6 900 Novoniber 170 8 4 6.7 337 December...... 243 15 4 7.S 482 . Calendar year 1943 ...... 9,593.0 1,000 0 E6.S 19,030 '29 January...... 406 - 13.1 8O5 February- ...... :. 41S 22 10 14.4 $89 March...... 2 484i 888 7 80.1 4,950 April ...... 4*n£ f

Little Colorado River at

Location.- Water-stage recorder, lat. 35°26', long. Hl°12', In T» 24 N.,-R. surveyed, at Grand Falls on Navajo Indian Reservation, 38 mllas northesst of Flagstaff and 96 miles upstream from mouth. Altitude of gage,rat>£iut 4,4$Q *f.eejt (from river-profile map). . / , * Drainage area.r 21,200 square miles. "~ " ' i Records avallable.- octooerr 1925' to September 1944. Secortfi? of monthly disgtiaree' prior « to octooer iy»a have been republishexl, with some additions/ In Wter-sipplrPaper ;

Average discharge..- 19 years, 310 second-feet. Extreme.8.- Maximum discharge during year, 5,320 second-feet Sept. 29 (gage height, 12.32- ree?;; no flow on ftany flays. 1925-44: Maximum discharge, 50,500 second-feet Apr. 5, 1929 (gage height, 30.0 feet); no flow during some periods in each year. (A discharge of about 120,000 second-feet occurred .Sept. 19, 1923 (gage height, 47.0 feet, from floodmarks). Remarks.- Records good except those for periods of ice effect or fragmentary gage- neignt record, which are fair. Diversions above station for irrigation, municipal, and railroad uses.

Discharge, in second-feet, water year October 1945 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept.' 1 80 2 0 0.5 15 3 657 757 0 * 47 3 0 .3 13 52 S96 f542 0 28 2 0 .1 12 159 : ,270 f647 22 Z 0 0 13 105 : ,420 832 0 5 f!6 2 0 0 12 53 1,450 1,160 0 6 fll 2 0 0 11 36 1,720 928 0 7 fS 1 0 0 8 86 : ,960 7O4 0 8 f4 .4 0 0 f 17 '< ,100 674 D ft f3 .2 0 0 5 11 £ ,050 733 t) 10 f2 0 0 0 4 11 1,800 745 0 - n f.5 0 0 0 3 14 1,680 776 & IS .1 0 0 0 3 16 961 f61S O 13 0 0 0 0 2 10 926 832 0 14 0 0 0 0 .6 12 : .380 674 0 IS 0 0 0 0 .S 401 1,420 464 0 16 0 Q 0 o .4 574 .1,200 f350 0 17 0 Q 0 0 .9 416 : ,160 f250 0 IB 0 0 1 Q S 490 : ,450 f210 0 IS 0 Q 2 0 7 479 : ,340 f!50 0 20 Q 0 1 0 13 710 1,160 f!30 0 21 0 0 .6 Q 11 652 863 fllO o a? Q Q 1 1 7 574 961 62 0 23 0 Q 2 10 S 484 788 56 0 P4 43 0 2 17 5 314 S47 f38 o 25 42 0 3 10 3 229 505 f30 28 25 Q be 8 2 344 800 f23 0 27 13 0 b4 7 2 1,000 928 14 0 2ft 7 Q b3 S 2 1,380 832 7 963 29 4 0 b3 10 3 1,160 : .,030 3 2,560 30 2 0 1 11 - 961 : ,030 1 782 31 1 " .3 14 - 757 ~ .2 * Second- .. _ Runoff la Month foot-days MaximuB Minimum **** acre-feet

80 December ...... 29.4 5 0 .95 58 Calendar year 1943 ...... 51,692.6 2,640 0 142 102,800

February ...... 15 .4 2,100 505 1,209 71,770 Hav 0 0 0 0 0 0 O 0 0 0 . 0 0 0 J September...... "...... 4,295 2,550 0 143 S,5£0 Water year 194S-44 ...... 65,048.1 2,650 0 T$& ^89,000 o Stage-discharge relation affected *y lee. . T ]?,-. t Fragmentary gage -height record; discharge computed from partly estimated gage .heights.; Tine pas Is i Mountain war time to Jta&» 31, 1943; aoiintaln standard tlrae thereafter. To (convert war time to standard tlate, subtract 1 bpjjr., . ^ l * * 270 LITTLE COLORADO RIVER BASIK

Sliver Creek near Woodruff, Arlz.

Location.- Water-stage recorder, lat. 34°44', long. 110°02', in sec. 32, T. 16, N.> RT"22~E., half a mile upstream from mouth and 3 miles south of Woodruff. Control for station Is crest of diversion dam, 1,700 feet downstream. Drainage area.- 942 square miles. Records available.- April 1929 to October 1933, October 1935 to September 1944. Average discharge.- 13 years, 26.7 second-feet. Extremes.- Maximum discharge during year, 416 second-feet Aug. 25 (gage height, 3.49 Feet); no flow on many days. 1929-44: Maximum discharge, 12,100 second-feet July 21, 1929, from rating curve extended above 3,000 second-feet on basis of records for Little Colorado River near Woodruff; maximum gage height, 12.37 feet July 26, 1940; no flow during several days in spring and-summer of each year. Remarks.- Records good. Diversion, above station for Irrigation. Flow regulated by several reservoirs (combined capacity, about 27,000 acre-feet). Records show discharge over dam and do not Include flow in canal that diverts at dam. Canal flow was measured as follows: Feb. 11, 1.57 second-feet; Feb. 23, 1.53 second- feet.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOV. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 9 3 3 blO 12 13 7 8 o 7 0 1 2 8 3 3 olO 12 10 6 5 o 14 0 .3 3 8 3 3 14 11 10 12 5 .3 7 0 .5 4 S 4 3 14 11 10 19 3 1 2 0 0 5 7 4 4 13 11 10 19 2 O .4 0 0 6 7 3 6 14 11 22, 15 0 .1 .6 0 0 7 7 2 6 14 13 22 13 0 .7 0 0 0 8 6 2 6 10 14 18 10 4 .3 .1 o 0 9 6 3 6 10 14 12 10 5 0 76 0 2 10 ,4 3 6 blO 14 10 6 5 .3 14 5 3 11 5 3 7 t>12 14 16 6 .9 2 1 .1 3 12 5 3 7 t>12 12 130 3 .6 2 .7 0 2 13 3 3 7 10 13 167 34 2 2 0 o 2 14 3 3 7 t>S 11 215 20 0 Z 0 o 1 15 3 3 7 b6 10 160 32 0 2 .3 3 .3 16 3 3 7 b8 11 112. 24 0 .7 0 9 2 17 2 3 7 t>e 11 144 20 .6 0 1 5 .4 18 2 3 e 9 11 248 22 .7 0 .2 0 0 19 76 3 8 10 11 157 21 1 .1 13 14 O 20 26 S 8 9 1O 157 15 .4 .1 SI 34 0 21 7 3 8 10 1O 104 13 .4 0 IS 14 0 22 4 2 9 10 1O 50 10 .4 0 6 6 0 23 3 2 9 10 10 31 9 .1 .2 5 3 0 24 3 2 9 11 10 29 8 2 0 8 1 O 25 3 2 9 14 10 135 7 2 0 12 144 2 26 3 2 9 12 10 126 5 2 0 7 22 79 27 3 3 10 11 11 65 .9 2 0 4 9 93 28 3 3 10 11 13 32 6 2 .2 .2 S 46 29 3 3 15 12 13 21 31 .6 .6 0 7 8 30 4 3 13 13 . 14 17 1 .5 0 4 7 31 4 blO 13 - 10 .9 0 4 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... S3S 76 2 7.7 472 November...... S5 4 2 2.S 169 December...... 230 15 3 7.4_ 456 Calendar year 1943 ...... 4,531.5 621 0 IS. 4 8,990. January...... 33S 14 6 10.9 670 February...... 334 14 10 11.5 662 llaroh...... i 2,250 24S J.O 72.6 4,460 April ...... 420.9 34 .£ 14.0 S35 May...... 56.6 S O 1.83 112 June ...... 16.6 3 0 .55 33 July...... 273.5 81 0 S.S2 542 August .....:...... 342.1 144 o0 11.0 679 September ...... 252.5 93 8.42 501 Water year 1943-44 ...... 4,837.2 24S 0 13.2 9,590 b Stage-discharge relation affected by ice. Time baela! Mountain war time to Dec. 31, 1943; mountain standard tike thereafter. To convert war time to standard time, subtract 1 hour. LITTLE COLORADO RIVER BASIN '371

Puerco River at Gallup, N. Hex.

Location.- Water-stage recorder, lat. 35°32', long. 108°44', in SWiNWi sec. 15, T. 15 N., K. IB \L, 1,500 feet upstream from Second street Bridge In Gallup and half a mile upstream from mouth of Little Puerco Wash. Datum of gage is 6,490.36 feet above mean sea level, datum of 1929. * Drainage area.- 558 square miles. Records available.- May 1940 to September 1944. Extremes.- Maximum discharge during year, 1,040 second-feet Sept. 27 (gage height, 4.30 reetj, from rating curve extended above 700 second-feet on basis of slope-area determination at 3,700 second-feet; no flow on many days. 1940-44: Maximum discharge, 3,700 second-feet Sept. 28, 1941 (gage height, 7.65 feet), by slope-area method; no flow on many days In each year. Remarks.- Records poor. Small diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. f 1 0 0 0.2 0.4 5 0 0 0 2 0 0 b.2 b'.4.4 5 0 0 0 3 0 0 b.2 5 0 0 0 4 0 0 .2 1 5 0 0 0 5 0 0 b.2 1 5 0 0 0 6 0 0 b.2 1 4 0 0 0 7 0 0 .2 2 1 0 0 0 8 0 0 .2 1".8 .2 0 0 0 9 0 4 b.2 0 0 7 0 10 0 1 b.2 0 0 0 0 0 11 0 1 .2 0 0 0 0 0 12 0 .8 .2 0 9 0 0 0 13 0 .6 .2 0 6 0 0 0 14 0 .4 b.2 0 2 0 0 0 15 0 .4 .2 0 2 0 0 0 16 0 .2 .2 0 £ 0 0 s 17 0 .2 b.2 0 0 0 4 7 18 0 .2 .2 0 1 0 S3 0 19 44 .2 b.S 0 15 0 76 0 20 3 .2 .2 0 2 5 f3 0 21 0 .2 .2 0 .2 0 0 0 22 0 .2 .2 0 0 0 0 0 23 0 .4 .2 0 2 .8 0 0 24 0 .4 .6 0 .3 0 4 4 25 0 .2 .6 0 1 0 fl fll 26 0 .2 .8 0 2 0 0 f5S 27 0 .4 .4 0 .4 0 0 171 28 0 b.2 .6 0 .2 , 0 0 119 29 21 b.2 .4 4 0 .5 0 a40 30 7 b.4 .4 _ 0 0 0 alO 31 1 b.S .2 - 0 0 0 ~ Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 76 44 0 £ 5 151 November ...... 0 0 0 0 0 December ...... 12.2 4 0 .39 24 Calendar year 1943 ...... 2,961.2 330 0 8.11 5,380 January. ..:...... 6*5 4* o'»2 38 17 February...... 3.2 0 .41 24 March...... 75*3 15 0 o'2.43 149 April ...... '...... 0 0 0 0 Hay...... 0 0 0 0 0 . June ...... 0 0 0 0 0 July...... 6.1 5 0 .20 12 August ...... 128 76 0 4.1 ,254 September...... '...... 423 171 0 14.1 839 Water year 1943-44 ...... 741.2 171 0 2.03 1,470 a Ho gage-height record; discharge computed on basia of typical recession curye for this station. b Stage-discharge relation affected by ice. " f Fragmentary gage-height record; discharge computed on basis of partly estimated gage-height record. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To oonvert war time to standard time, subtract 1 hour. 372 LITTLE COLORADO RIVER BASIN

Puerco River near Adanana, Ariz.

Location.- Water-stage recorder, lat. 34°59', long.-109°48', In sec. 9, T. 18 N., R. 24 E., at highway bridge In Petrified Forest National Monument, three-quarters of a mile downstream from Dead River and 14 miles southeast of Adajnana. Datum of gage Is 5,312.92 feet above mean sea level, datum of 1929. Drainage area.- 2,760 square miles. Records available.- March 1940 to September 1944. Extremes.- Maximum discharge during year, 4,700 second-feet Sept. 26 (gage height, 7.2 feet); no flow cfurlng part of year. 1940-44: Maximum discharge, 22,600 second-feet Sept. 29, 1941 (gage height, 9.5 feet); no flow during parts of each year. Remarks.- Records poor. Small diversions, mostly by pumping, above station.

Discharge, in second-feet, water year October 194S to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 0 1 0 0 43 1 IS 0 O 0 2 o 20 0 0 34 2 6 10 0 0 3 0 16 0 0 26 7 2 4 0 0 A o 6 0 0 28 7 0 2 o 0 s 0 4 0 0 39 4 0 O 0 0 6 0 1 0 0 29 2 0 0 0 0 7 0 0 0 0 27 2 0 0 0 0 8 0 0 0 4 19 S 0. 0 0 0 9 0 0 0 9 16 5 0 6 0 0 10 0 0 0 10 14 8 2 S 60 0 11 0 0 0 10 11 5 0 1 44 0 IP. 0 0 0 S 2S 9 0 0 <$ 0 is 0 0 0 4 100 11 0 0 0 0 14 0 o 0 1 98 22 0 0 0 0 IS 0 0 0 0 108 9 0 0 0 0 16 0 0 0 0 58 14 0 0 0 0 17 0 0 0 0 25 8 0 0 0 0 0 0 0 0 25 1 0 0 0 63 19 0 0 0 0 30 0 0 0 14 9 20 se 0 0 0 IS 0 0 10 156 7 21 31 0 0 0 IS 0 0 6 19 4 ?fl 19 0 0 0 11 0 0 7 1 ?,X 12 0 2 0 10 0 0 »2 8?S 0 ?4 5 0 17 0 6 0 0 36 8i 0 25 2 0 s 0 3 0 0 S3 0 14 ?f> 1 0 0 0 12 0 0 4 0 676 m 0 0 0 10 14 0 0 0 0 928 ?fl 0 0 0 24 13 7 a 0 0 607 W 17 0 0 ,26 9 13 0 0 0 384 30 16 0 0 _ 6 16 0 0 0 118 31 6 - 0 - S - 0 0 0 "

Second- Runoff in Month fcot-days Maximum Minimum Mean acre-feet 0 S91 4S 20 0 1.6 95 December...... 0 0 0 0 0 Calendar year 1943 ...... 6,306 920 0 17.3 12,510 27 17 0 .9 64 , 106 26 0 3.7 210 870 10S s 28.1 1,780 156 22 0 5.2 509 May.-...... ^...... 23 13 0 .7 46 . 0 0 0 0 0 July .--..-...-.-....--...... 124 36 0 4.0 246 Augu St...... 308 156 0 9.9 611 September...... 2,751 928 0 91.7 5,460 Water year 1943-44 ...... 4,610 92S 0 12.6 9,150 g Computed from graph based on gage readings Time basis; Mountain wap time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. LITTLE COLORADO RIVER BASIN 273

Chevelon Pork near Wlnslow, Aria,

Location.- Water-stage recorder, lat. 34°56', long. 110°31', In sec, 27, T. 18 N., R, 17 is., 3 miles upstream from mouth and 12 miles southeast of Winslow. Drainage area.- 1,010 square miles. Records available.- December 1905 to December 1908, December 1915 to December 1919, narcn laaa to February 1934, and September 1935 to September 1944. Average discharge.- 16 years (1916-19, 1929-33, 1935-44), 54.8 second-feet. Extremes.- Maximum discharge during year, 1,180 second-feet Apr. 6 (gage height, 6.87 reetj; minimum daily, 1.7 second-feet Aug. 2, 3, 6. 1929-44: Maximum discharge, 16,100 second-feet Apr. 4, 1929 (gage height, 17.8 feet), from rating curve extended above 6,000 second-feet; minimum, about 1 second- foot at times in each of several years. Remarks.- Records good. No diversion above station. Chevelon Canal diverts downstream TFonTstation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 4.3 3.3 3.S 4.3 6.6 5.6 287 191 ee.7 65.9 1.9 e3.3 Z 4.0 3.3 3.8 4.0 6.6 5.1 420 195 e8.0 65.3 el.7 eS.3 3 3.8 3.5 4.0 S.S 6.3 5.1 537 209 e7.6 5.1 el.7 3.3 A 3.5 3.3 4.0 4.0 5.9 5.1 574 226 7.6 5.3 1.9 3.3 5 3.5 3.5 3.8 3.8 6.3 5.6 713 174 8.7 4.6 S.S 3.3 6 5.0 4.0 3.8 4.0 6.3 5.9 893 137 eS.S 4.S 1.7 3.5 7 3.0 3.5 5.1 4.3 6.3 5.6 916 119 ee.o 4.6 2.1 3.3 8 3.0 3.5 4.8 3.6 5.9 5.6 799 112 e7.6 4.6 e.s 3.3 '9 3.5 3.5 4.8 3.8 5.6 8.3 692 101 e7.3 4.6 3.0 3.8 10 3.3 3.5 4.8 3.8 6.3 19 558 90 7.0 4.6 2.6 3.8 11 3.5 3.5 4.8 4.3 6.3 22 364 78 8.3 4.8 2.8 3.8 12 3.8 3.5 4.6 4.3 6.6 23 420 207 9.4 4.S 2.8 63.3 13 3.8 3.5 5.3 4.6 7.0 35 612 137 69.4 4.8 2.8 3.3 14 3.8 3.5 5.1 4.6 6.3 106 593 94 e9.0 4.6 2.5 £jg 15 3.8 3.5 4.6 4.6 6.6 137 502 69 e8.3 5.1 2.1 26 16 3.8 3.8 4.3 5.1 6.6 112 451 e53 e7.3 5.3 2.3 9 17 3.3 3.S 4.0 5.1 6.6 102 555 41 65.6 5.1 2.5 5 18 2.5 3.8 4.0 5.1 6.6 106 436 S3 5.1 4.8 2.8 i 19 2.5 4.0 4.0 5.3 6.6 110 406 26 4.S 4.8 3.5 20 2.6 4.0 4.0 5.3 5.6 123 287 22 e4.6 5.1 3.5 21 2.6 3.5 3.8 5.3 5.1 110 391 IS 64.6 5.3 3.5 22 2.6 eS.S 4.0 1 5.3 5.6 115 369 14 4.6 5.3 3.3 23 S.6 3.3 4.3 5.1 5.6 97 217 11 S3 .6 5.3 4.6 24 2.6 3.5 4.0 4.S 5.3 79 252 10 e7.0 5.3 7.6 S 25 2.8 3.8 4.0 5.1 5.6 78 326 11 e7.0 4.3 7.0 94 26 2.8 4.0 4.6 5.6 6.3 186 314 12 , 65.6 3.6 4.8 14S 27 2.B 3.8 4.8 5.3 ' 6.3 326 244 12 5.9 3.8 4.0 45 28 62.8 3.3 4.3 5.6 6.3 338 291 12 6.6 3.8 3.8 13 29 3.0 3.S 4.0 6.3 5.9 314 267 11 ef.s 3.5 3.8 7.3 30 3.3 S.S 4.0 6.3 _ -250 213 10 5.9 2.6 3.5 4.3 31 2.6 - 4.0 6.3 - 215 - e9.0 - 2.1 3.3 ~

Second- Runoff in Month foot-daya MOXiffiUIB Minima Mean acre-feet

October 96.8 4.3 2.5 3.19 193 November...... 108.4 4.0 3.3 3.61 215 December...... 133.2 5.3 S.S 4.30 264 Calendar year 1943 ...... 17,090.4 93 2 2 46.8 33,900 January 146.9 6*3 3.8 4.80 29& February...... 17S. 9 7.0 5.1 6.17 355 Baron...... 3,054.9 338 5.1 98*5 6,060 April ...... 916 £13 460 27,360 *ay...... s'444.0 £26 Q 0 78*6 4,850 June ...... r ...... 209.7 9.4 4)6 6 99 416 July...... 143.7 5.9 2.1 4J64 285 August...... 98.0' 7.6 1.7 3 «16 194 September...... 452.7 148 5 15.1 89S Water year 1943-44 ...... 20,867.2 916 1.7 57.0 41,390 e Gage heights affected by draw-down from strong winds; discharge computed from estimated graph based on gage heights unaffected by wind. Tlae basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standardstime, subtract 1 hour. 374 LITTLE COLORADO RIVER BASIN

Clear Creek near Wlnslow, Aria.

Location.- Water-stage recorder, lat. 34°S8', long. 110°38', in SEi sec. 9, T. 18 N., R. 16 E., li miles upstream from mouth and 5 miles southeast of Winslow. Control for station is crest' of diversion dam 1,000 feet downstream. Drainage area.- 607 square miles. Records available.- March 1929 to February 1934, October 1935 to September 1944. June 1906 to January 1909. at site 3 miles upstream. Average discharge.- 13 years (1929-53, 1935-44), 93,9 second-feet. Extremes.- Maximum discharge during year, 1,500 sectind-feet Apr. 8 (gage height, 6.71 feet); no flow during most of year. 1929-44: Maximum discharge, 50,000 second-feet Apr. 4, 1929 (gage height, 18.1 feet), from rating curve extended above 13,800 second-feet on basis of velocity-area studies; no flow on many days in each year. * Remarks.- Records good except those below 10 second-feet, which are poor. Water diverted above station for municipal and railroad use. Records show discharge over dam and do not Include flow In canal that diverts at dam or leakage through daia. Leakage below dam during year was measured as follows: Oct. 15, 2.3 second-feet; Feb. 3, 2.1 second-feet; Aug. 7, 2.1 second-feet.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. ;

1 0 317 446 15 0 2 0 497 497 12 0 3 0 641 720 9 0 4 0 730 926 7 0 5 0 904 690 4 0 6 0 1,090 605 2 0 7 0 1,260 623 2 0 8 o 1,250 680 0 0 9 0 1,070 605 O iO 0 982 569 0 0 11 0 632 605 0 0 12 0 587 700 0 13 0 761 515 0 0 14 0 S71 438 0 0 15 0 805 414 0 0 *6 43 740 368 0 0 17 124 970 297 0 0 18 133 S71 S3S 0 0 19 124 794 188 0 0 20 133 596 150 0 0 21 133 680 128 0 0 22 150 551 101 , 0 0 23 12S 414 87 0 0 24 101 438 76 0 0 25 S7 605 65 0 1 26 155 690 50 0 27 430 650 45 0 6 28 438 783 36 0 3 29 375 740 30 0 30 317 533 2S 0 0 31 250 - 20 0 Second- Runoff in Month fee t-days Maximum Minimum Mean acre-feet 0 0 0 0 0 0 0 G 0 0 December ...... 0 0 0 0 0 Calendar year 1943 ...... 22,000 1,170 C 60.3 43,640 J*mi»rv ...... 0 0 0 0 0 Febr 0 0 0 0 0 Marc 3,121 436 0 101 6,190 April...... 22,452 1,260 317 748 44,530 10,940 926 20 353 21,700 51 15 0 1.7 101 0 0 C 0 0 Augu St...... 0 0 0 0 0 September...... 20 9 0 .7 40 Water year 1943-44 ...... 36,584 1,260 0 100 72,560 Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert to standard time, subtract 1 hour. LITTLE COLORADO RIVER BASIN 275

Moenkopl Wash near Tuba, Arts.

Location.- Water-stage recorder, lat. 36°02', long. 111°24', In T. 31 N., R. 9 ,E., un- surveyed, on Navajo Indian Reservation, at bridge on U. S. Highway 89, 9 miles UPK etream from mouth, 11 miles north of Cameron, and 11 miles southwest of Tuba. Datum of gage is 4,310.96 feet above mean sea level (Arizona Highway Department bench marfc). Drainage area.- 2,490 square miles. Records available.- July 1926 to September 1944. Average discharge.- 18 years, 22.0 second-feet. ' Extremes.- Maximum discharge during year, 964 second-feet Sept. 27 (gage height, 3.11 reetj; no flow on many days In spring and summer. 1926-44: Maximum discharge, 15,100 second-feet Aug. 4, 1929, by slope-area method; no flow on several days In each year. Remarks.- Records fair except those for Aug. 19, 20, Sept. 28-30, which are poor, inversions above station for irrigation; none below.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 8 a3 3 4 7 S al 0 0 0 2 5 3 3 . 5 6 6 1 0 0 0 3 3 3 3 4 5 5 .3 0 0 0 4 3 3 2 5 5 6 .1 0 0 0 S 3 3 1 3 6 16 .6 0 0 0 6 3 3 4 4 6 9 .2 0 0 0 7 2 3 4 2 7 1 .1 0 0 0 8 4 2 3 b2 7 .8 0 0 0 0 9 3 3 4 b2 8 .1 .3 0 0 0 10 3 3 3 b2 8 0 5 14 0 0 11 3 2 4 b5 9 0 13 8 0 0 12 4 2 3 b4 6 0 6 Z 0 0 13 3 3 3 b4 5 0 2 1 0 0 14 2 3 3 b4 3 56 1 .S 0 0 15 2 3 2 b5 1 23 1 .4 0 0 16 3 3 2 b4 .8 12 .6 .2 0 0 17 3 3 2 b3 .3 10 ,2 .1 0 0 18 3 3 3 b5 .5 7 .: 0 0 0 19 66 3 3 b4 .3 6 .1 0 f44 0 20 93 3 3 b5 .5 a5 .1 0 f!9 0 21 f!9 3 3 b5 .3 a4 .1 0 12 0 22 f6 3 6 5 1 a3 .£ 0 7 0 23 f4 3 7 7 2 a3 .9 0 3 0 24 fS 3 5 8 6 a2 .£ 0 2 0 25 fS 3 4 10 8 a2 0 0 .9 4 26 f3 2 4 6 11 a2 0 0 .5 12 27 a3 4 3 7 12 aS 0 0 .2 71 28 a3 2 3 7 11 al 0 0 .1 f!6 29 B.3 1 4 6 9 al 0 i 0 0 a5 30 a3 2 4 7 _ al 0 0 0 a4 31 a3 - 4 6 - al - 0 0 " Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

274 93 2 S.8 543 83 4 1 2.S 165 December ...... 105 7 .1 3.4 20S Calendar year 1943 ...... 4,528.8 1,670 0 12.4 8,980 Janu 150 10 z 4.S 298 Febr 151.7 12 .1 5.23 301 h...... 192.9 56 0 6.S2 383 Apri 34.2 13 0 1.14 ,68 May 26.5 14 0 .85 53 0 0 0 0 0 July ...... 0 0 0 0 0 Augu 88.7 44 0 2.86 176 September...... 112 71 0 3.7 ooo Water year 1943-44 ...... 1,818.0 93 0 3.33 2,420 a No gage-height record; discharge computed on basis of weather records, known upper limit of dis­ charge, and shape of probable recession curve. b Stage-discharge relation affected by ice. f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 676 BRIGHT ANGEL CREEK BASIN

Bright Angel Creek near Grand Canyon, Ariz.

Location-- Water-stage recorder, lat. 36°05'55", long. 112005'40", 1.000 feet upstream from mouth and 11 miles by trail from Grand Canyon, Coconlno County. Datum of gage is 2,452.1 feet above sea level (preliminary datum of 1929). Drainage area.- 100 square miles. Records available.- October 1923 to September 1944. Average discharge.- 21 vyears, 41.1 second-feet. Extremes.- Maximum discharge during year, 199 second-feet Hay 15; minimum daily, 20 second-feet Aug. 12-14, 16, 22-28. 1923-44: Maximum discharge, 4,400 second-feet Aug. 19, 1936, by slope-area method; minimum, 9 second-feet (regulated) June 29, 1934. Remarks.- Records good. Small diversipns above station for irrigation. Some fluctuation in flow caused, by power plant 9 miles above station; no regulation by storage.

Discharge, In second-feet, water year October 1943 tc Septamber 1944 Day Oct. Ncv. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 22 26 25 26 26 29 28 47 78 30 23 82 2 21 26 26 26 26 29 28 53 73 31 23 23 3 21 26 26 26 26 29 23 68 71 30 S3 83 4 21 26 25 26 27 29 29 88 62 30 23 SS 5 22 26 25 26 28 30 31 111 68 28 23 28 6 22 26 28 26 28 28 33 130 51 29 23 22 7 22 25 26 26 28 26 35 148 48 29 82 28 8 23 25 27 26 28 26 36 164 47 29 24 28 9 24 35 28 26 29 26 40 172 45 30 25 22 10 24 25 26 26 27 26 38 183 43 29 21 as 11 25 24 26 26 26 28 .36 179 42 28 21 as 12 25 24 26 26 26 28 36 174 39 28 20 82 13 25 24 27 26 27 29 38 181 37 28 20 83 14 26 24 26 26 26 40 37 183 35 87 20 83 15 26 24 26 26 28 32 37 191 35 27 22 24 16 26 23 26 39 20 26 29 33 179 35 27 "2484 17 28 23 26 26 28 34 39 161 35 86 23 84~ 18 31 23 26 26 28 34 38 128 34 25 23 19 37 23 27 26 27 32 39 114 33 25 83 84 20 32 23 27 26 27 31 44 109 31 84 82 23 21 31 22 27 26 . 30 30 46 106 31 84 21 85 22 31 23 27 26 29 30 44 101 33 29 80 ""88 23 30 22 27 26 27 27 42 100 32 27 20 * 88 24 30 22 27 29 30 27 40 101 31 25 SO 28 25 29 23 27 29 31 27 43 100 34 23 20 83 26 28 24 27 28 29 29 44 94 34 83 20. 33 27 28 24 27 28 29 28 46 88 33 23 80 23 28 27 25 26 28 SS 87 82 85 52 23 20 as 29 27 25 26 27 28 27 51 86 31 23 21 22 30 27 25 26 . 27 , . 27 48 82 30 24 21 81 31 26 26 28 - 27 - 80 - 24 21

Seccnd- Runoff in Month foot-days Maximum Minima Mean ao re-feet October ...... 817 37 21 26.4 1,620 November...... 726 26 22 24.2 1,440 Depember...... 818 28 25 86.4 1,680 Calendar year 1943 ...... 16,886 372 21 46.3 33,490 January...... 822 29 86 26.5 1,630 February...... 807 31 26 27.8 1,600 March...... 905 40 26 29.2 1,800 April...... 1,165 62 28 38.8 2,310 - May 3,785 191 47 122 7,510 June ...... 1,253 78 30 41.8 2,490 July...... 828 31 23 26.7 1,640 Augu St...... 666 24 20 21.5 1,320, September...... '...... 679 24 21 22.6 1,350^ Water year 1943-44 ...... 13,271 191 20 36.3 26,330 Time basis: Mountain war time through Dec. 31, 1943, mountain standard tine thereafter. To convert war time to standard time, subtract 1 hour. VIRGIN RIVER BffiSIN 277

Virgin River at Virgin, Utah

Location.- Chain gage, lat. 37°13', long. 113°11', In SEiSBt sec. 22, T. 41 S., R. 12 w., at east side of Virgin, 0.5 mile downstream from North Creek. Drainage area.- 934 square miles. Hecords available.- April 1909 to September 1944 (fragmentary prior to October 1925). Average discharge.- 25 years (1910-14, 1915-16, 1917-18, 1923-24, 1926-44), 281 second- feet. Extremes.- Maximum discharge observed during year, 1,070 second-feet Way 12 (gage height, 6.59 feet); minimum observed, 54 second-feet Sept. 23, 24. 1909-44: Jfeximum discharge, 13,500 second-feet Ifer. 3, 1938 (gage height, 10.7 feet, from floodmarks) by slope-area method: minimum observed, 23 second-feet Sept. 30, 1931. Remarks.- Records fair. Gage read once dally. Diversions above station for irrigation.* Cooperation.- Six discharge meaeurements furnished by Bureau of Reclamation.

Discharge, ID second-feet, water year October 1943 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 116 113 107 156 197 201 280 33S 428 110 74 77 2 116 132 113 150 201 197 292 590 380 104 74 74 3 110 168 104 160 185 274 304 514 444 104 69 79 4 104 110 110 142 156 176 324 560 352 104 78 79 5 104 110 110 139 150 262 317 aBOO 324 1O4 78 79 6 96 110 150 176 153 176 404 1,010 230 87 77. 72 7 107 110 136 150 168 156 36S 716 250 87 77 72 8 104 107 132 150 164 172 33S 997 221 82 77 77 a 98 113 153 146 226 185 298 893 256 85 79 77 10 104 113 146 146 176 201 274 868 226 85 74 74 11 128 113 150 142 16S 2S1 256 880 206 82 69 74 12 116 107 150 136 156 230 304 1,070 150 S7 69 , 1* 13 110 110 146 139 164 240 256 820 150 82 69 74 14 110 110 139 139 139 189 280 1,040 136 72 69 72 15 101 110 12S 128 150 197 304 - 760 153 82 78 78 16 95 104 122 122 150 180 304 919 146 82 72 72 17 107 110 119 125 146 185 317 694 145 77 77 98 18 146 107 146 125 139 193 304 eao 139 72 77 74 19 317 113 136 136 136 206 304 640 139 72 72 69 20 146 113 153 156 156 206 460 452 136 72 90 65 21 136 119 176 160 164 206 274 550 185 72 95 60 22 128 119 176 160 a!60 193 262 560 119 77 79 88 23 1£8 110 168 180 185 262 338 590 122 90 74 54 24 128 110 172 164 189 292 352 694 116 77 74 64 25 128 110 156 146 189 304 310 541 119 72 74 68 1'60 26 128 110 146 189 274 324 541 113 72 74 87 27 136 110 132 172 150 26S 538 478 116 72 79 74 28 136 107 116 142 164 256 452 514 125 72 79 74 29 136 101 128 al40 168 235 396 444 UO 74 77 74 30 132 107 132 153 _ 292 373 505 110 74 82 67 31 132 - 125 164 - 331 - e700 74 82 - Second- Runoff in Month foot-days Maximum Minima Heaa aore-fesft October...... 3,885 317 95 125 7,710 November...... 3,346 132 101 112 6,640 Deceaber ...... 4,277 176 104 138 S,480 Calendar year 1943 ...... 64,685 749 47 177 128,300 January...... 4,604 ieo 122 . 149 9,130" February...... 4,838 ess 136 167 9,900 March &,960 331 156 -I 225 13,800 April...... 9,777 , 460 256 ' ' 386 19,890 toy...... 21,22s 1,076 ase 685 42,110 June . -...... - 5,767 444 11C 192 11,440 July...... 2,558 110

Virgin River at LIttlefleld, Arlz.

Location.- Water-stage recorder, lat. 36°53', long. 113°56', In SW^SWi sec. 4, T. 40 N., R~TT5""W., three-eighths of a mile downstream from Beaverdam Wash, three-eighths of a mile upstream from LIttlefleld, and 36 miles upstream from water line of Lake Mead at elevation 1,221 feet above mean sea level. Datum of gage Is 1,763.68 feet above mean sea level, datum of 1929. Drainage area.- 5,090 square miles. Records avallable.- October 1929 to September 1944. Records of monthly discharges prior to ±y3B repuDiished In Water-supply Paper 918. Average discharge.- 15 years, 277 second-feet, Extremes.- Maximum discharge during year, 1,900 second-feet May 9 (gage height, 4.99 reet); minimum, 63 second-feet several days during July and August. 1929-44: Maximum discharge, 22,000 second-feet Mar. 3, 1938 (gage height, 12.8 , feet, present datum, from floodmarks). by slope-area method; minimum observed, about 50 second-feet on many days In several years, resulting from nearby fairly uniform spring Inflow. Remarks.- Records good. Many diversions for Irrigation, above station and several below.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept.

1 142 151 17O 1S7 256 222 413 445 540 67 63 67 2 112 145 164 198 26O 2SS 467 557 440 66 64 67 3 110 14Q 164 198 252 358 511 663 401 64 64 67 4 110 145 161 . 208 249 426 532 650 430 63 64 67 5 108 137 170 198 233 428 532 772 387 63 64 66 6 110 142 212 218 268 511 521 1,020 327 63 63 68 7 100 145 241 230 276 316 496 1,100 253 63 63 68 8 93 161 204 187 284 280 521 1,180 222 63 63 70 9 87 161 198 201 3O4 249 626 1,260 192 63 63 72 10 76 154 194 215 320 288 467 1,260 182 63 66 72 11 80 157 174 226 284 412 375 1,140 170 66 64 72 12 87 151 187 226 222 578 366 1,10O 166 64 63 72 13 100 154 218 215 212 917 375 1,180 134 64 64 72 14 93 154 226 194 ess 1,050 337 1.2CO 115 63 64 72 15 89 184 215 174, 2C2 620 337 1,140' 1O5 63 64 70 16 93 170 .190 208 241 506 354 1,140 98 64 66 70 17 98 170 180 22S 230 435 383 . 1,020 112 63 66 70 18 89 167 177 204 230 467 358 726 10S 63 67 70 19 300 170 236 194 226 454 354 614 110 64 67 70 20 426 167 276 194 SIS 396 337 579 128 64 72 70 21 241 167 280 212 222 379 487 545 87 67 1OO 72 22 241 208 280 190 190 349 383 540 76 64 66 72 23 201 292 264 174 239 308 329 568 78 64 66 72 24 170 21S 241 237 345 337 358 620 74 66 66 7B 25 154 194 198 304 387 3S7 362 579 74 66 66 73 26 142 170 233 272 362 417 325 529 73 66 66 74 27 142 184 212 252 284 379 333 460 73 66 66 74 28 140 177 208 296 260 3O4 4OO 430 72 64 64 74 29 145 177 204 204 260 284 608 420 68 64 66 73 30 148 177 222 230 - 264 470 435 68 63 66 73 31 148 ~ 222 237 - 354 759 63 67 Second- Runoff in Month foci t-days Maximum Minimum Mean ao re-feet

October ...... 4,385 436 76 141 8,700 November...... 5,089 292 131 170 10,090 December ...... 6,5^1 280 161 210 12,930 ' Calendar year 1943 ...... 90,327 1 * 790 63 247 » *-WU January...... 6,7O5 3Q4 174 216 13,300 February...... 7,552 387 360 14 980 March...... 12,963 1,05O SSS 25*710 April...... 12,717 626 32 e 424 25,220 May...... 24*661 1,260 420 48,890 June ...... 5,363 540 68 17Q 10,640 July...... 1,989 67 63 64.2 3,950 August...... 2,053 100 63 66. S 4,070 September...... 2,121 74 66 . 70.7 4,210 Water year 1943-44 ...... 92,109 1,260 63 252 182,700 Time baaia; Mountain war time to Dec. 31, 1943} mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. VIRGIN RIVER BASIN 279

North Fork Virgin River near Sprlngdale, Utah

Location.- Staff gage, lat. 37°12'35R , long. 112°58'40«-, In SWiNWi sec. 22, T. 41 S. R. 10 W., In Zlon National Park, 0.2 mile downstream f rom point of diversion of Sprlngdale Canal, 0.5 mile downstream from Pine Creek, and 1.9 miles northeast of Sprlngdale. Drainage area.- 336 equare miles. Records available.- October 1932 to September 1944. June to November 1923, April 1925 to September 1932 at site a. quarter of a mile upstream from Pine Creek. Average discharge.- 18 years (1925-31, 1932-44), 109 second-feet. Extremes.- Ifaxlmum discharge observed during year, 966 second-feet May 15; minimum observed, 28 second-feet Jan. 15. 1925-44: Maximum discharge, 7,000 second-feet Ifer. 3, 1938 (gage height, 11.0 feet, from floodmarks), by slope-area method; minimum discharge observed, 24 second- feet Dec. 17, 31, 1928. Remarks.- Records fair. Gage read once dally. Figures given herein Include Springdale Canal which diverts water In NWiNWi sec. 22, T. 41 S., R. 10 W., for Irrigation in vicinity of Springdale. Flow may be slightly affected by small diversions above station for irrigation. Cooperation.- Two discharge measurements furnished by Bureau of Rec lariat ion.

Combined discharge. In second-feet, of North Fork Virgin River and Sprlngdale Canal near Sprlngdale, Utah, water year October 1943 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 aBl 63 53 56 68 77 137 289 333 90 59 44 2 a81 44 53 43 65 84 153 367 300 90 54 43 67 44 53 58 54 150 157 361 381 87 54 42 74 46 53 43 '6556 77 172 390 324 S7 52 42 b S9 52 56 31 77 165 460 246 78 54 44 6 75 52 57 62 65 49 166 501 234 76 54 44 7 61 45 65 41 65 53 172 535 220 76 54 44 46 41 56 34 68 54 176 571 208 76 52 44 43 43 56 38 76 71 152 607 197 73 52 42 10 46 52 54 46 66 78 155 605 185 73 52 42 11 43 53 52 56 48 116 155 687 175 74 48 42 12 46 53 52 46 62 122 159 772 166 71 48 42 13 43 53 54 43 58 161 155 886 163 69 50 42 46 53 46 41 62 131 - 159 899 142 71 48 42 IS 48 a 53 36 28 65 76 159 966 142 69 52 42 16 48 53 37 51 54 67 174 882 128 63 48 42 17 47 a53 35 51 73 103 179 613 132 63 43 42 18 67 R53 52 51 57 87 174 545 120 63 46 42 19 133 a53 62 51 62 82 141 539 117 63 46 42 20 86 53 72 51 62 90 315 478 117 63 59 42 21 65 55 67 57 70 89 114 432 115 61 51 42 22 65 a55 57 57 65 4S 155 485 112 61 48 42 23 58 a54 54 57 76 83 " 144 666 109 64 46 42 24 63 54 54 65 76 91 144 629 108 61 48 42 25 65 a54 52 58 121 97 163 511 108 58 48 42 26 63 52 47 59 6S 83 180 452 114 58 51 54 27 63 a52 30 62 76 95 204 445 a!24 58 48 50 48- 28 63 52 33 49 73 66 184 405 100 '5557 50 29 63 52 54 54 65 72 216 425 82 47 4S 30 63 52 54 a57 S7 224 394 80 * 55 44 48 31 63 - 54 62 - 120 - 692 55 44 -

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October 1,986 3,940 1,544 63 41 December...... 1,612 ' 72 30 52.0 3.200 Calendar year 1943 ...... 36,574 734 30 100 72,540 1,55S 65 28 3,090 1,935 121 48 3,840 Z, 736 161 5,103 315 114 10,120 Hay...... 17,689 966 5,032 333 80 169 10,030 July 2,118 90 55 68.3 4,200 1,553 59 44 50.1 3,080 September...... 1,311 54 42 43.7 2,600 Water year 1943-44 ...... 44,227 966 28 121 87,730 a No gage-height record; discharge Interpolated or computed on basis of records for Virgin River at Virgin, Utah, and Virgin River at Llttlefleld, Arlz. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 280 VIRGIN RIVER BASIN

Ash Creek near New Harmony, Utah

Location.- Water-stage recorder, 1st. 37°25', long. 113°12', in E£ sec. 7, T. 39 S., R. 12 W., 2 miles downstream from Kanara Creek and 6 miles southeast of New Harmony. Records available.- January 1939 to September 1944. Extremes.1- Maximum discharge during year, 385 second-feet Mar. 13 (gage height, 3.32 feet); no flow July 21 to Sept. 30. 1939-44: Maximum discharge, 1,500 second-feet Sept. 28, 1940 {gage height, 4.25 feet), by slope-area.method; no flow at times. Revisions.- The maxlmtan discharge for water years 1942 and 1943 have been revised as follows: 1941-42: Maximum discharge, 495 second-feet Oct. 20. 1942-43: Maximum discharge, 985 second-feet Aug. 17. These figures supersede those published in Water-Supply Papers 959 and 979 respectively. Remarks.- Records fair except those for periods of Ice effect or no gage-height record, which are poor. Cooperation.- Eight discharge measurements furnished by Bureau of Reclamation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 1.1 bl.5 U2.5 11 35 53 30 0.8 2 1.1 bl.6 U2.5 ie 40 63 28 .8 3 1.1 bl.6 U2.5 24 50 53 30 .7 4 1.2 bl.6 b2.5 («) 36 60 55 24 .9 5 1.2 1.7 2.6 65 70 64 18 .8 8 1.2 bl.8 «e.s 23 SO 84 19 .8 7 1.3 bl.S U2.S 18 100 103 21 .8 8 1.3 U2.2 1)2.6 19 80 108 21 .5 9 1.3 b2.2 b2.S 22 50 106 22 .7 10 1.3 U2.3 03. 0 40 46 96 20 .7

11 1.4 '2.42.3 bS.l 60 60 77 15 .7 12 1.5 3.1 83 SO 54 10 .6 13 1.5 2.5 3.1 117 54 95 8 .6 14 1.5 2.3 b2.8 75 50 100 7 .5 15 1.5 2.3 b2.7 . (») 38 46 96 6 .4 - ^ > b3 b5 16 1.5 2.3 b2.7 32 43 35 5 .4 17 1.5 2.4 D2.S 47 37 54 4 .3 18 2.0 2.3 b3.1 37 30 36 5 .2 19 3.O 2.5 4.5 30 26 28 1.8 .2 20 2.6 2.4 4.9 , 26 33 27 1.5 .1 21 2.1 5.0 4.4 IS 30 27 .9 0 22 2.1 »11 4.0 17 25 24 .9 0 23 2.1 b3.4 5.6 19 26 32 .8 0 24 2.0 3.0 b3.6 31 53 36 .8 0 25 l.S 2.4 5.6 41 55 28 1.1 0 0 * 28 1.8 b2.3 b3.3 SO 36 23 2.5 27 1?S b2.4 b3.0 24 36 22 1.3 0 28 1.5 b2. 5 bS.O ie 36 26 .9 0 29 1.4 b2.5 b3.3 17 37 26 .8 0 30 1.5 b2.5 b3.2 _ 20 46 33 - .8_ 0 31 bl.5 - bS.O - 30 - 30 - 0 Seoond- Runoff in Month foot-days Maxima" Minima Mean acre-feet

October...... ,..'...... 49.6 3.0 1.1 1.60 Vvaa November...... ryafo.b ti 11 1.5 2*56 162 December...... 97.4 4.9 2.5 3.14 193 Calendar year 194S ...... 2,636.6 119 0 7.28 5,230 -_-,__ i. January...... 95 3 184 February _ _ B 288 arch...... 1 086 117 , 11 35.0 2,160 April...... l^SSX1,77T'- 100 26 46.0 8,740 May..Ua«* ...... 168 22 . 57-.1 3, BIO June ...... 304.9 30 .8 10.2 606 July...... 11.8 .9 0 .38 S3- August ...... 0 0 0 0 0 September...... 0 0 0 a 0 Water year 1943-44 ...... 5,015.3 117 0 13.7 9,940

.. 1-26, June 6-18, July 10 to Sept. 30; discharge m,ei-(ju±Bi.Bu or computed on oasis or records ror stations on nearby streams. Time baala; Mountain war time. To convert war time to standard time, subtract 1thour. VIRGIN RiraR BASIN 281

Santa. Clara Creek near Central, Utah

Location.- Water-stage recorder, lat. 37°24', long. 113°37', In SEi sec. 11, T. 2 S., R. . 16 W., 150 feet upstream from road bridge, 1 mile southeast of Central, and 1$ miles upstream from Kane Spring Draw. Drainage area.- 97 square miles (revised). Records available.- April 1909 to September 1930, November 1938 to September 1944. Average discharge.- 27 years (1909-30, 1938-44), 20.1 second-feet. Extremes.- Ibximum discharge during year, 140 second-feet Apr. 7 (gage height, 2.10 feet); minimum daily, 5.1 second-feet on several days in October, November, January. 1909-30, 1938-44: Maximum.discharge, 1,450 second-feet Oct. 6, 1916 (gage height, 5.0 feet from floodmarks, site and datum then in use), from rajting curve extended above 200 second-feet; minimum daily, 2 second-feet on many days in 1939, 1940, 1941. Remarks.- Records good except those for periods of no gage-height record, which are fair. Ftay diversions above and below station for irrigation. Cooperation.- Nine discharge measurements furnished by Bureau of Reclamation.

Rating table, water year 1943-44 (gage height, In feet, and discharge, In second-feet) 0.3 3.8 0.6 10 1.2 40 .4 5.6 .8 17 1.5 65 .5 7.7 1.0 27 1.8 93

Discharge, in second- feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. llay June July Aug. Sept. 1 5.1 6.9 6.0 5.2 6.6 6.9 33 2S S3 26 f!3 7,3 2 5.1 r.i 6.0 5.2 6.9 7.1 39 34 74 29 alS 7.5 3 43 34 75 26 al4 7.5 4 5.8 7.1 6.2 5.1 7.1 7.3 52 35 63 24 a!3 7.5 5 5.1 6.9 6.2 5.1 6.9 7.7 56 42 58 2-1 all 7.3 6 5.4 6.4 6.4 5.6 6.9 6.9 63 50 59 21 alO 7.1 7 5.3 6.4 6.0 5.1 7.1 6.4 86 57 67 81 alO 7.1 8 5. S 6.4 5. B 5.1 7.5 6.6 69 58 67 20 alO 7.3 9 5.8 6.4 5.S 5.1 7.7 6.6 33 71 72 18 alO 7.5 10 5.4 6.4 6.6 5.1 7.5 S.4 2S 73 66 17 alO 7.5 11 5.4 6.2 6.2 5.1 6.4 13 32 66 60 17 alO 7.1 12 5.6 6.0 6.2 S.l 6.4 27 40 71 50 17 alOall " 7.3 13 5.4 5.8 6.2 5.2 6.6 22 34 S6 46 17 7.1 14 5.4 5.1 6.0 5.2 6.6 11 32 92 42 16 alO 7.1 15 5.4 5.1 5.4 5.2 6.6 13 29 93 40 15 alO 6.9 16 5.6 5.6 5.4 5.4 6.2 14 27 93 36 15 alO 6.9 17 5.6 6.4 5.6 5.4 6.6 17 21 72 34 15 a9 7.1 18 5.6 6.8 6.2 5.4 6.6 '15 20 50 23 15 a9 7.1 19 6.6 6.2 7.1 5.4 6.4 13 16 44 27 16 alO 7.3 20 6.0 6.2 7.7 5.4 6.4 13 21 40 25 15 alO 7.1 21 6.0 6.6 7.3 6.4 6.4 13 18 40 28 15 alO 7.1 22 7.1 7.3 7.1 5.4 6.2 11 15 42 29 14 alO 6.9 23 7.1 6.6 6.4 5.4 6.0 11 17 56 24 14 a9 . 6.9 24 6.9 6.2 6.0 6.4 6.0 14 20 70 24 f!3 S.2 6.9 25 6.6 6.8 6.0 7.1 7.1 19 21 72 23 - f!3 8.2 6.6 26 6.4 6.0 5.6 6.2 6.6 17 22 64 24 f!2 S.O 6.6 27 6.6 6.2 5.2 6.2 6.6 14 22 60 24 f!2 S.O 6.6 28 6.6 6.0 5.2 6.4 6.6 12 22 72 24 f!2 7.3 6.6 29 6.6 6.0 5.8 6.6 6.6 12 24 75 22 f!2 7.1 6.9 30 7.1 6.0 5.4 6.6 20 24 96 22 f!2 7.1 ' 6.9 31 6.9 5.2 6.6 27 90 f!4 7.1

Month £££. "~ Minimum Mean acre-feetRunoff in

Octo 182.7 7.1 ' 5.1 5.S9 368 Hove ber...... IBS. 4 7.3 5.1 6.2S 374 Deoember...... 188.0 7.7 5.2 6.06 373 Calendar year 1943 . 4,791.1 73 4 13.1 9,500 Janu ary 173.0 7.1 5.1 5.5S 343 Febr 194.2 7.7 6.0 6.70 385 Marc 399.4 -27 6.4 12.9 798 Apr! 979 S6 15 32.6 1,940 1,926 96 28 62.1 S,S20 Jane 1,316 S3 22 ' 43.9 2,610 July 584 29 12 16.9 1,040 AuguSt...... SOS.O 14 7.1 9.77 601 September...... 218.6 7.5 6.6 7.09 422 Water year 1943-44 ...... 6,586.3 96 6.1 18.0 13,060 a No gage-height record; discharge computed on basis of records for Santa Clara River near Santa Clara. f Computed on basis of partly estimated gage heights. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 19 ' 282 VIRGIN RIVER BASIN

Santa Clara Creek above Winsor Dam, near Santa Clara, Utah » Location.- Water-stage recorder, lat. 37°13', long. 113°47', near center of sec. 17, T. 41 3'., R. 17 W., 2 miles upstream from Winsor Dam, 2i miles downstream from Sandy Wash, 8 miles downstream from Magotsu Creek, and 9 miles northwest of Santa Clara. Drainage area.- 338 square miles. Records available.- March 1942 to September 1944. Extremes.- Maximum discharge during year, 320 second-feet Mar. 10 (gage height, 2.95 feet), from rating curve extended above 200 second-feet; minimum dally, 11 second-feet Sept. 28. 1942-44: Maximum discharge, 2,400 second-feet Aug. 9, 1942 (gage height, 5.5 feet), from rating curve extended above 200 second-feet by logarithmic plotting; minimum daily, 11 second-feet July 14-16, 22, 27, 28, 1943, Sept. 28, 1944.

Remarks.- Records good except those for periods of no gage-height record, which are fair. Many diversions above station for irrigation. Flow slightly regulated by plants of Southern Utah Power Co. Cooperation.- Ten discharge measurements furnished by Bureau of Reclamation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 15 17 16 a25 22 22 84 33 S6 28 16 14 2 15 19 16 a25 22 29 77 28 84 29 16 14 3 15 19 16 25 20 57 100 25 84 29 18 14 4 15 19 17 25 20 57 100 22 73 24 17 14 5 15 18 18 30 20 a9S 107 26 66 26 16 14 6 15 V 23 28 19 a52 102 35 55 24 IS 14 7 14 17 19 25 26 a31 107 38 61 25 15 14 fl 14 16 18 23 32 a32 102 45 68 22 15 14 9 14 16 19 22 40 a32 68 55 70 22 15 14 10 14 16 22 22 34 a 70 57 61 68 23 15 13 ' 15 11 14 16 28 22 25 a!20 50 53 61 23 14 12 14 16 21 20 24 a!80 53 52 55 24 16 14 13 14 16 16 19 15 a92 52 64 42 24 15 14 14 14 14 19, 20 23 79 45 64 31 24 15 14 15 14 14 18 19 22 75 41 70 33 23 15 14 16 14 15 20 18 19 62 40 75 34 24 15 14 17 14 15 19 19 20 61 34 68 35 23 14 15 18 16 15 816 19 21 84 29 50 31 22 14 15 19 19 14 a 28 19 20 59 28 40 26 22 15 14 20 19 14 a32 19 20 75 29 34 26 21 15 14 21 18 15 a30 19 22 50 30 35 30 21 15 14 22 18 16 a29 19 21 42 28 37 32 20 15 14 23 16 17 a28 18 24 42 23 44 29 21 14 13 24 19 18 a27 21 28 53 24 57 30 20 14 13 25 17 16 a27 19 29 79 28 68 29 20 15 12 26 19 16 a26 22 24 70 25 55 30 21 14 13 27 19 16 a25 24 24 59 24 47 28 21 14 13 28 19 14 a25 21 24 38 31 57 29 19 14 11 29 17 16 a30 20 24 40 32 70 28 19 13 12 30 19 14 a27 20 _ 44 30 90 26 19 14 13 31 17 - a26 22 - 59 - 98 - 19 14 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 19 14 December...... 695 3E 16 s 22.4 1,380 Calendar year 1943 ...... 10,419 191 11 28.5 20,660

684 40 15 23.6 1,360 March...... April ...... 1,580 107 23 52.7 3,130 May...... 1,596 98 22 51.5 3,170 1,362 86 26 46.1 2,740 702 29 19 22.6 1,390 18 13 14.9 918 September...... 409 15 11 13.6 811 Water year 1943-44 ...... 11,100 180 11 30.3 22,020 a No gage-height record; discharge computed on basis of weather records and records for Santa Clara Creek near Central and Ash Creek near Hew Hswmony. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. BILL WILLIAMS RIVER BASIN 283

Bill Williams River near Alamo, Arlz. (Formerly published as Williams River)

Location.- Water-stage recorder, lat, 34°14', long. 113°35', in SW£t!W£ sec. 2, T. 10 N., R- 13 W., 1.5 miles downstream from Alamo, 2.0 miles downstream from Bullard Wash, and 6 miles downstream from confluence of Santa Maria and Big Sandy Rivers. Datum of gage is 1,002.95 feet above mean sea level, datum of 1929. Drainage area.- 4,730 square miles, of which 400 square miles is below confluence of Santa mrla and Bi@»Sandy Rivers. Records available.- December 1939 to September 1944. Extremes.- Maximum discharge during year, 11,000 second-feet Feb. 24 (gage height, 10.65 feet); minimum, 4 second-feet on many days during summer. 1940-44: Maximum discharge, 38,200 second-feet Mar. 14, 1941 (gage height, 23.0 feet); minimum, 3 second-feet Aug. 21, 1942, and several days in May and July 1943. Flood of Sept. 6, 1939, reached a stage of 39.6 feet, from floodnarks (discharge, 77,000 second-feet, from slope-area determination made just below confluence of Santa Maria and Big Sandy Rivers). Floodmarks indicate a previous stage of about 46 feet. Remarks.- Records fair. Diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 f7 S 10 31 aBO 2,190 ' 8S 24 7 7 4 4 2 f7 8 10 31 a20 2,380 80 22 7 5 4 4 3 f7 8 10 31 a20 3,700 80 21 7 5 4 4 4 f7 8 10 30 a20 3,760 74 18 7 5 4 4 5 f7 8 10 29 a20 3; 510 74 18 7 5 4 4 6 f7 S 11 23 a20 4,390 71 16 7 5 4 4 7 f6 8 11 20 a20 2,090 71 15 6 5 4 4 8 f6 8 10 19 a35 1,340 71 14 5 5 4 4 9 f6 9 11 19 a25 1,180 74 13 5 5 4 4 10 f6 9 12 19 a24 1,340 84 13 5 5 4 4 11 f6 9 12 20 a24 1,600 77 12 4 5 4 12 6 10 12 19 a23 1,900 74 12 4 5 4 13 7 10 14 19 «23 1,400 71 11 4 5 4 1,4 8 10 14 19 a22 2,160 65 10 5 4 5 15 S 10 15 20 22 1,960 56 e 5 4 27 16 9 10 15 20 23 1,280 53 7 5 4 12 17 9 10 15 20 26 3,090 50 7 5 4 9 18 11 10 16 19 29 2,460 46 7 5 4 8 19 85 10 19 19 24 1,500 44 7 5 4 S 20 f7S 11 19 18 26 865 36 7 5 4 8 21 33 11 37 18 109 520 32 7 6 8 22 28 11 37 18 201 425 28 7 6 8 23 24 11 2S 16 269 324 27 6 8 ?4 19 10 27 22 4,070 300 27 6 7 25 15 10 28 21 4,690 272 24 5 4 7 26 14 10 30 aSl 2,250 188 24 6 , 4 7 27 12 10 30 aSl 1,260 155 26 6 4 7 28 11 10 30 a21 1,710 155 26 5 4 6 29 10 11 30 B.21 2,920 130 26 6 5 4 7 30 9 11 31 aSl _ 108 27 6 7 4 4 7 31 9 - 31 aSl - 100 6 - 4 4 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 477 85 6 15.4 946 287 11 8 9.6 569 December ...... 595 37 10 19.2 1,180 Calendar year 1943 ...... 11,036 1,370 3 30.2 21,900 31 March...... ibo 1,50? 92,770 3,190 May...... 333 124 246 September ...... 201 27 4 6.7 399 Water year 1943-44 ...... 69,318 4,690 4 189 137,500 Peak -discharge.- Feb. 24 (8:30 p.m.) 11,000 sec.-ft.; Feb. 29 (9:30 a.m.) 4,650 sec.-ft,; Mar. 6 (11:30 a.m.) 5,470 sec.-ft.; Mar. 14 (5 p.m.)' 4,390 sec,-ft.; Mar. 17 (9 a.m.) 6,780-sec.-ft. a No gage-height record; discharge computed on basis of recorded range in stage and by comparison with records for Santa Maria River near Alamo. f Computed on basis of par.tly estimated gage-height record. Not e. - River not directly connected to gage during periods Oct. 21 to Nov. 1, Jan. 7-17, Mar. 86 to Sept. 30; discharge computed on basis of recorded variations in ground-water level, partial record, records of adjoining stations, and 11 discharge measurements. Tiae basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 284 BILL WILLIAMS RIVER BASIN Bill Williams River at Planet, Arlz. (Formerly published as Williams River)

Location.- Water-stage recorder, lat. 34°16', long. 113°59', In NEi sec. 36, T. 11 N., R. 17 W. , 1 mile west of Planet and 6 miles upstream from water line of Havasu Lake at elevation 450 feet above mean sea level. Datum of gage Is 556.33 feet above mean sea level, datum of 1929. Drainage area.- 5,140 square miles. 9 Records available.- October 1910 to December 1912 (gage heights only), January 1913 to December 1915, October 1928 to September 1944. Records of monthly discharge prior to October 1938 have been republishod, with some additions, in Water-supply Paper 918. Average discharge.- 16 years (1928-44), 161 second-feet. Extremes .- Maximum discharge during year, 10,800 second-feet Feb. 24 (gage height, 7.19 feet): minimum observed, 14 second-feet on many days in January and February. 1928-44: Ifeximum discharge, 92,500 second-feet Feb. 7, 1937 (gage height, 13.1 feet), from rating curve extended above 51,000 second-feet on basis of velocity-area study; minimum, 7 second-feet Sept. 30, Oct. 1, 1934. Higher known floods and estimated discharges occurred as follows: 125,000 second- feet Feb. 16, 1927; 175,000 second-feet about Jan. 19, 1916'; 200,000 second-feet about Feb. 21, 1891. Remarks.- Records good prior to Mir. 25; fair thereafter Small diversions above station ror Irrigation. Discharge, in second-feat, water year October 1943 to September 1944 T>ay Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 19 16 17 16 14 1,160 76 31 22 22 21 17 2 IB 16 16 16 14 1,730 65 30 23 24 21 17 3 IB 16 16 16 14 2,230 55 30 23 23 21 17 4 17 15 16 16 14 2,790 65 30 22 23 21 18 5 16 16 17 16 14 3,010 48 30 22 23 21 IB 6 16 16 17 17 14 2,900 45 30 22 22 21 18 7 16 16 16 17 14 1,910 40 30 22 22 21 18 8 16 18 16 17 14 1,590 40 30 22 22 21 18 9 16 IS 16 17 16 1,100 38 28 22 22 21 18 10 16 18 16 17 16 1,290 36 26 22 22 21 18 11 15 18 16 17 14 1,610 36 26 22 21 21 17 12 16 18 16 17 14 1,980 36 26 22 21 20 18 13 16 IS 16 17 14 1,610 36 26 22 24 20 18 14 15 IS 16 16 14 1,740 34 25 22 21 20 18 15 16 IS 16 16 14 2,630 34 23 22 21 19 115 16 18 18 15 16 15 1,510 31 24 22 21 19 42 17 16 18 15 16 15 2,660 30 24 23 21 19 a25 IB 16 IS 15 16 16 2,030 31 23 23 21 19 a 22 19 24 IS 16 16 15 1,290 32 23 23 21 19 a20 20 116 17 16 16 16 712 31 22 22 21 19 a20 21 46 18 16 16 22 463 SI 22 22 21 19 a20 22 25 ^.7 15 15 30 326 SI 22 23 21 18 a20 23 21 * 17 15 16 138 242 31 22 23 21 18 a20 24 18 17 15 16 2,220 198 31 22 22 22 18 a20 26 15 17 15 16 4,500 182 31 22 22 21 18 a20 26 15 17 15 15 1,080 140 31 22 22 21 18 a20 27 15 17 15 15 914 119 34 22 22 21 IS a20 2fi 15 17 15 15 1,140 111 36 22 22 21 17 a20 29 15 17 15 14 1,280 98 32 22 22 21 18 a20 30 IS 17 16 14 _ 88 32 22 22 21 17 a20 31 15 - 16 14 - 82 - 22 - 20 ie - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

Deoeiber ...... 485 17 15 15.6 962 Calendar year 1943 ...... 7,171 761 14 19.6 14,220 978

April...... 667 22 22.2 July...... 666 24 20 21.5 1,320 21 19.4 1,190 September...... 690 Us 17 23.0 1,370 Hater year 1943-44 ...... 57,647 4,500 14 158 114,300 Peak discharge.- Feb. 24 (11:30 p.m.) 10,80O sec.-ft.; Mar. 5'(6 p.m.) 4,520 sec.-ft.; Mar. 17 (2;30 p.m.) 4,780 sec.-ft. a No gage-height record; discharge computed on basis of knows recession characteristics of summer floods. . Note.- During period Mar. 25 to Sept. 16, except part of Sept. 15-16, river was not directly con­ nected to gage; discharge computed oa basis of recorded variations in ground-water level, 8 discharge measurements, and records for station near Alamo. . Tiae ba«lg-; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. BILL WILLIAMS RIVER BASIN 285

Santa Maria River near Alamo,' Arlz. ' Location.- Water-stage recorder, lat. 34°18', long. 113°31', In NEiSWi sec. 9, T. 11 N., K. 12 W., half a mile upstream from confluence with Big Sandy River and 5i miles upstream from Alamo. Datum of gage Is 1,126.6 feet above mean sea level (from river- profile survey). Drainage area.- 1,520 square miles. Kecoras avallable.- December 1939 to September 1944. Extremes.- mximum discharge during year, 6,000 second-feet Feb. 24 (gage height, 7.05 reet); minimum, 1 second-foot on many days during summer. 1939-44: mximum discharge, 15,000 second-feet Sept. 6 or 7, 1939, mr. 14, 1941 (gage height, 9.85 feet), by slope-area method; minimum, 1 second-foot on many days each year. Floodmarks Indicate a stage of 12.0 feet occurred probably In 1937 or 1938. Remarks.- Records fair. Several diversions above station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Da, Oct. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 3 a3 3 6 4 900 27 7 5 2 2. 2 2 3 a3 3 6 4 941 25 7 * 2 2 2 3 3 a3 2 6 4 1,020 25 7 4 2 2 2 4 3 a3 3 6 4 1,230 25 7 4 2 2 2 S 3 a3 3 6 4 1,090 20 7 4 2 2 2 6 3 as 3 6 3 898 20 7 3 2 2 2 7- 3 a3 3 5 4 375 SO 7 3 2 2 2 8 3 aS 2 5 40 355 20 6 3 2 2 2 ft 3 a3 3 5 11 295 20 7 3 2 2 2 10 3 a3 2 5 e 430 18 7 2 2 2 a 11 3 a3 3 6 7 735 16 7 2 2 2 2 If. 3 aS 3 v 6 7 778 16 7 2 2 2 2 3 aS 5 6 6 . 664 15 7 2 3 2 2 14 3 aS 6 6 6 990 12 7 E 2 2 2 IS S aS 4 6 5 856 12 7 2 2 2 8 Ifi 2 3 5 6 3 770 10 7 2 2 2 3 2 3 3 6 3 969 10 7 2 2 E 2 S 2 3 6 5 873 9 7 2 2 2 8 109 3 3 6 4 614 9 7 S 2 2 2 20 50 3 3 6 3 255 9 7 E 2 2 2 a!7 4 12 6 , 26 167 9 7 2 2 2 2 alO 4 5 5 116 109 10 6 2 2 S 2 23 a8 4 4 5 127 89 10 6 2 2 2 2 24 a7 4 4 5 2,670 58 10 6 2 2 2 2 25 a7 4 4 4 2,520 50 9 6 2 2 2 2 26 «6 4 4 4 1,180 30 9 5 2 2 2 2 27 a6 3 4 4 850 25 9 6 2 2 2 2 28 a5 3 5 4 1,080 23 9 6 2 2 2 8 29 a4 3 5 4 1,070 25 9 5 2 2 2 2 a4 3 5 4 - 25 S 4 2 2 2 2 31 a3 " 5 4 " 27 " 4 "" 2 2 " Seoond- Runoff in Month foot-days MaxiBun HinlimiB - Mean acre-feet October...... 292 109 2 9,4 579 December...... 119 12 S 3.8 256 Calendar year 1943 ...... 2,669 . 255 1 7.3 5,290 165 4 5.3 327 9,774 2,670 3 337 19,390 March 15,666 1,230 23 31,070 430 21 S 14.3 853 May...... BOO 7 4 6.5 397 75 5 2 2.5 149 63 3 2 2.0 125 August 62 2 2 2.0 123 September...... ;...... 67 S 2 2.2 133 Water year 1943-44 ...... 27,008 -2,670 2 73.8 53,570 Peak discharge.- Feb. -24 (6.-30 p.m.) 6.0OO sets.-ft.; Mar. 14 (3 p.m.) 3.050 sec.-ft.; Mar. 17 (4 a.m. ) 1,680 sec.-ft. a Ho gage-height record; discharge computed on basis of records for station on Bill Williams River near Alamo and recorded range In stage fqr period Hov. 2-15. Note.- After July 2 river was not directly connected to gage except for par.t of Sept. 15; dlscharra computed on basis of recorded variation In ground-water level and 5 discharge measurements. Time basis; Mountain war time to. Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hpur. Date Creek near Congress, Arlz. Location,- Water-stage recorder, lat. 34°12', long. 113°08', In NWiSEi sec. 13, T. 10 N., R. 9 W., 0.6 mile upstream from Sawyer dam site, 17 miles west of Congress, and 25 miles upstream from mouth. Drainage area.- 127 square mllee. 'Mecoras available.- October 1939 to December 1944 (discontinued). Extremes.- mximum discharge during water year 1943-44, 280 second-feet Feb. 24 (gage height, 5.26 feet); no flow most of year. 1939-44: mximum discharge, 1,400 second-feet mr. 14, 1941 (gage height, 5.75 . feet) by slope-area studies; no flow greater part of each year. Remarks.- Record poor. Figures of dally discharge not sufficiently accurate for publt- cation. Small diversions above station for Irrigation. 296 BILL .. -LLIAMS RIVER BASIN Monthly discharge, In seuond-feet, of Date Creek near Congress, Arlz., 1943-44 Runoff in Second- Minimum Mean Month foot-days Maximum ao re-feet October...... 2 0 0 0 0 0 2 2 0 .06 4.0 Calendar year 1943 ...... 61 40 0 .2 1210~~ ~ 0 0 0 0 231 70 0 8.0 458 March...... 85 40 0 2.7 169 April ...... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .5 .5 0 .02 1.0 August ...... -0 0 0 0 0 0 .03 2.0 Water year 1943-44 ...... 321.5 70 0 .88 638 October...... 0 0 2 2 0 .07 4.0 December. ..'...... 0 0 0 0 0 _ Calendar "year 194,4 ...... 319.5 70 0 .87 634 _ GILA RIVER BASIN Qlla River near Glla, N. Hex. Location.- Water-stage recorder, lat. 33°04'05", long. 108°32'10", In SEiSWi sec. 19, T. 14 S., R. 16 W., at Hooker dam site, 1 mile upstream from Mogollon Creek and 7 miles northeast of Glla. Datum of gage Is 4,655.8 feet above mean sea level (from river- profile survey). Drainage area.- 1,870 square miles. Records available.- April to December 1914 (at site 3 miles upstream and a quarter of a mlie"downstream from Turkey Creek) and October 1930 to September 1944 In reports of Geological Survey. April to December 1914, November 1927 to December 1928 (at site 3 miles upstream), and January 1929 to December 1931 In reports of State engineer. Average discharge.- 16 years (1928-44), 138 second-feet. Extremes.- Maximum discharge during year, 2,910 second-feet Aug. 18 (gage height, 6.32 reet;; minimum dally, 27 second-feet June 29. 1930-44: Maximum discharge, 25^400 second-feet Sept. 29, 1941 (gage height, 17.2 feet, from floodmark). from rating curve extended above 1,100 second-feet on basis of velocity-area studies and logarithmic plotting; minimum daily, 21 second-feet June 22, 27, 1934, July 14, 1939. Remarks.- Records good. One small diversion above station for Irrigation. Discharge. in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aue. Sent. 1 110 64 64 58 61 64 9S 83 52 31 54 72 2 94 63 64 56 60 63 98 84 49 42 46 63 3 84 63 63 56 58 66 96 84 48 54 45 65 4 76 61 63 56 58 68 96 83 47 48 41 64 5 76 63 63 56 56 69 96 81 46 63 41 75 6 70 63 63 54 56 69 98 81 44 68 42 65 7 69 61 64 55 58 69 98 80 43 64 107 6258' 8 64 61 65 55 58 69 102 79 43 55 70 9 61 61 68 55 59 70 109 77 41 56 84 57 10' 61 60 70 55 60 70 _117 80 38 59 104 54 11 60 61 69 54 61 72 112 81 37 53 93 53 12 59 61 69 54 66 70 105 SO 36 47 130 51 13 56 61 70 54 66 72 100 80 36 42 155 51 14 56 61 69 54 66 73 100 83 35 40 104 52 15 55 61 69 53 64 79 100 63 34 42 84 54 16 55 61 68 53 64 83 99 81 34 41 102 88 17 55 61 64 53 64 87 93 79 33 52 104 93 18 54 61 64 53 ' 6163 94 88 77 32 80 1,090 74 19 61 60 64 54 105 90 77 32 92 1,120 65 20 72 60 64 55 59 109 8S 76 31 1?4 640 59 21 69 60 65 55 60 109 88 74 30 117 425 56 22 65 60 66 55 61 105 88 72 31 136 302 ' 53 23 64 60 64 58 61 99 90 66 31 177 221 51 24 63 61 63 59 63 96 88 64 29 339 ISO 62 25 61 61 61 65 63 92 84 61 29 200 154 176 931 26 60 63 61 66 66 eo 59 ' 29 132 135 177 27 60 65 66 65 66 100 80 60 98 115 147 28 60 65 64 64 65 109 77 59 28 81 103 128 29 61 65 63 63 65 112 77 59 32'27 73 95 188 30 65 64 60 63 _ 109 79 58 66 88 144 ?vl 65 - 58 63 - 104 - 55 - 59 80 - Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-fee.t Ootcoer...... 2,040 " 110 54 65.8 4,050 November ...... 1,852 65 60 61.7 3,670 December ...... 2,008 70 58 64.8 3,980

Calendar year 1943 ...... 29y > 467 622 27 OO. 58J 450 January...... 1 f 769 66 53 57 1 3,510 February ...... 1,793 68 56 61.8 3,560 March...... 2,649 112 63 85. 5 5,250 April ...... 2,814 117 77 93 8 5,580 May...... 2,298 84 55 74J1 4,560 June ...... 1,036 52 27 2,150 July...... 2,641 339 31 85.2 5,240 August ...... 6,156 1,120 41 199 12,210 September...... 2,462 188 51 82.1 4,880 Water year 1943-44 ...... 29,568 1,120 27 so.e 58,640 Peak discharge.- July 24 (2 a.m.) 415 sec.-ft,; Aug. 18 (10 p m 1 2 90O sac ft 3** OS313 .! n^ain war time. To convert war tile to standard t?me? subtrlct' 01LA RIVER BASIN 287

Glla River near Cliff, N. Hex.

Location.- Water-stage recorder, lat. 32°56 l 20n , long. 108036'20n , in Si sec; 4, T. 16 S., 'K. 17 W.. on U. S. Highway 260, li miles downstream from Bear Cresk, li miles south of Cliff, 2t miles southwest of Gila, and 6i miles upstream from Mangas Creek. Datum of gage is 4,454.5 feet above mean, sea level, datum of 1929. Records available.- January 1942 to September 1944. September 1904 to December 1907 at site 6f miles downstream, below Mangas Creek (gage heights only prior to my 22, 1905, and during 1907). Extremes.- Maximum discharge during year, 4,020 second-feet Aug. 18, 19, from rating curve extended above 2,500 second-feet by logarithmic plotting; maximum gage height, 6.80 feet Aug. 18; minimum daily discharge, 12 second-feet June 29, 30. 1942-44: Maximum discharge, 6,880 second-feet Sept. 12, 1942 (gage height, 7.25 '- feet), from rating curve extended above 2,500 second-feet by logarithmic plotting: minimum daily, that of June 29, 30, 1944. Maximum stage known, 14.0 feet Sept. 29, 1941. Remarks.- Records good except those for August and September, which are fair. Diversions aoove station for irrigation.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. I 135 70 61 73 81 81 94 61 48 26 23 64 2 110 66 68 71 79 79 77 56 48 re 16 59 3 101 68 70 71 75 79 V 56 49 16 14 53 4 90 68 6S 70 77 77 71 59 42 20 14 53 5 79 66 61 70 81 75 61 53 34 26 14 218 6 71 61 58 71 81 73 70 45 28 26 32 112 7 70 66 66 70 77 71 79 45 29 26 43 81 8 70 66 73 75 77 66 79 45 28 282 50 71 f> 70 71 79 77 77 , 66 105 37 32 66 305 63 10 66 73 81 71 81 66 117 37 26 56 119 - 59 11 68 79 81 71 SI 56 101 49 26 49 103 52 1? 64 77 S4 64 77 46 88 45 26 43 135 43 IS 59 77 86 5S 73 45 86 4S 23 31 140- 41 14 61 79 86 59 73 50 96 55 23 24 105 37 15 58 77 86 63 73 59 99 66 24 20 . 90 40 Ifi 5S 70 84 64 75 64 101 63 22 18 85 56 17 58 73 82 5S 75 59 80 7e 21 21 130 88 in 59 77 81 55 75 58 81 71 20 38 1,420 82 19 68 75 79 52 75 82 77 58 21 79 2,180 73 20 75 75 S2 53 73 90 73 61 20 103 836 64 ?1 84 75 81 56 73 92 90 63 19 124 510 53 84 75 79 58 73 94 94 53 16 124 370 49 23 77 75 77 66 73 92 92 52 15 187 260 43 75 73 77 61 68 S6 S4 46 17 391 19S 81 25 73 70 81 75 75 81 66 43 15 276 164 137 ftfi 66 75 SI 77 75 81 58 46 14 155 140 198 61 71 S4 77 77 82 59 53 14 94 119 198 ?fl 63 68 81 75 81 94 61 59 14 66 103 152 70 61 71 7.7 81 103 VO 63 12 42 84 184 30 75 58 73 75 103 77 56 12 29 75 1S4 31 77 - 75 77- - 99 - - 30 71 - Second- Runoff in Month foot-davs Maximum Minimum Mean acre-feat 2,297 135 58 74.1 4,560 79 71 2 December...... 2,376 86 58 76.6 4,7lo Calendar year 1943 ...... 33,191 1,020 15 90.9 65,830 2,090 77 52 67.4 4,150 », 21 2 81 68 76.3 4,390 March...... 2,349 103 45 75.8 4,660 2,465 117 5S 82.2 4,390 May...... 1,665 73 37 53.7 3,300 738 49 12 24.6 1,460 July...... 2,504 391 16 80.8 4,970 7,943 2,130 14 256 15,760 2,688 213 37 39.6 5.330_ ' Water year 1943-44 ...... 31,469 2, ISO 12 86.0 62,420 Peak discharge.- July 8 (7:30 p.m.) 2.4OO sec.-ft.; Aug. 9 (4 p.m.) 1,920 sec.-ft.; Aug. 17 (9 p.m.) 1,370 sec.-ft.; Aug. 18 (9 p.m.) 4,020 sec.-ft.; Aug. 19 (1 a.m.) 4,020 sec.-ft.; Sept. 5 (5 p.m.) 1,580 sec.-ft. Time baais; Mountain war time. To convert war time to standard time, subtract 1 hour. 288 GIIA RIVER BASIN

Qlla River near Red Rock, N. Hex.

Location.- Water-stage recorder, lat. 32°43'30", long. 108°40'30", In Wi sec. 23, T. 18 s., R. 18 W., 4 miles northeast of Red Rock and 11 miles downstream from Jtmgas Creek. Drainage area.- 2,860 square miles. Records available.- nay 1908 to December 1914 and October 1930 to September 1944 In reports or Geological Survey. May 1908 to December 1931 in reports of State engineer. Average discharge.- 26 years (1909-10, 1912r-14, 1918-24, 1927-44), 190 second-feet. Extremes.- Maximum discharge during year, 3,080 second-feet Aug. 18 (gage height, 10.20 reet;, from rating curve extended above 790 second-feet by logarithmic plotting; minimum dally., 15 second-feet June 27. 1930-44: ttaximum gage height, about 31 feet Sept. 29, 1941 (discharge not determined), from floodmarks; minimum dally discharge', 6.0 second-feet July 12, 1939. Remarks.- Records good except those for July to September, which are poor. Diversions aoove station for irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 154 88 76 S6 85 91 119 SI 44 20 48 a80 2 132 S2 80 81 88 91 104 76 46 30 45 a?5 3 119 SJ. 85 85 SS 89 71 61 46 32 39 a70 4 111 84 88 7S 82 91 72 65 44 K2 33 a7O 5 99 84 84 7S 86 S6 61 66 31 46 32 177 *' 85 6 S6 78 77 S2 88 58 62 22 44 34 205 7 S2 SO 77 80 88 82 61 47 22 se 61 alOO S2 82 84 76 84 80 60 47 23 149 118 a90 80 S2 89 81 85 77 84 44 22 221 307 a80 10 SI 88 92 80 8S 80 132 43 36 32 227 aTB 7S S9 91 76 88 72 116 52 37 76 146 a75 1? 76 92 92 75 S8 65 80 52 32 70 181 a7o 71 92 95 67 81 60 73 65 30 59 177 aTO 72 92 95 6S 80 65 96 75 . 29 54 171 aSO 15 67 95 93 71 7S 72 98 70 29 53 168 a60 67 89 93 71 SO 73 98 75 31 50 615 '10078 68 S6 93 70 84 81 95 73 29 43 526 la 67 S9 93 66 SI 71 95 82 29 48 1,720 116 73 92 89 64 80 SB 96 82 27 127 2,OOO 102 20 81 91 91 62 SI 105 81 78 27 124 825 89 88 86 91 65 82 110 32 76 26 154 585 81 22 89 88 91 65 S2 110 106 64 24 179 425 70 23 91 91 88 72 S2 110 99 60 23 3le 310 64 85 S9 88 76 S2 105' 106 59 22 341 228 91 25 89 84 89 75 SS 99 91 52 22 321 193 134 26 84 86 92 81 85 9S 76 50 16 215 a!70 215 27 77 89 96 84 S6 99 76 66 15 163 a!40 202 76 S6 93 S2 89 106 76 67 23 aJ.00 alSO 187 80 80 S5 82 91 122 71 71 16 73 allO 175 .TO 86 77 84 S4 128 S3 65 20 54 alOO 19S 31 88 - S6 82 - 119 52 ~ 49 a90 ~ Seccnd- Runoff in Month foot-days MaxiBUB MiniBUB Mean «cre-f*ot 2,679 2,692 95 86.4 December...... 2,740 96 76 88.4 5,430 Calendar year 1943 ...... 37,738 1,OOO 15 104 . 74,950

May...... 3 930 July ...... 3,337 9,944 19 V20 September...... 3,259 215 60 109 6,460 Water year 1943-44 ...... 37,646 2,000 15 103 74,650 Peak discharge.- July 23 (7 D.m.) 1,320 sec. -ft.: Aug. 9 (9 p.m. 1 l,35n sac. -ft.; Aug. IB po p-">-) t.,.>fu ov7i,*-j. u., nu£. j. i \AV p.m. j j.,*ru asc.-ib.; Aug. J.ES torou p.m.; £,UBU sec. -IT. a No gage-height record; discharge computed on basis of weather records and records for stations near Cliff and below Blue Creek. Time basis; Mountain war time. To convert war tine to standard time, subtract 1 hour. GILA RIVER BASIN 289

Glla River below Blue Creek, near Vlrden, N. Mex.

Location.- Water-stage recorder, lat. 32°39', long. 108°51', In SEiSWi sec. 18, T. 19 S., R. is W., at head of canyon, li miles downstream from Blue Creek, 10 miles east of Vlrden, and 16 miles east ot Duncan, Arlz. Datum of gage Is 3,875 feet above meaa sea level (from river-profile map). Drainage area.- 3,220 square miles, excluding Anlmas River Basin. Records available.- June 1931 to September 1944. May 1914 to September 1915 at site 6 miles downstream, above Intake of Sunset Canal. January 1923 to September 1926 at site -8 miles downstream, below intake of Sunset Canal. October 1926 to September 1931, at Vlrden Bridge, 8i miles downstream. Average discharge;- 13 years (1931-44), 190 second-feet. Extremes.- Maximum discharge during year, 4,010 second-feet Aug. 19 (gage height, 9.03 reetj; minimum, 5 second-feet July 2. 1931-44: Maximum discharge, 41,700 second-feet Sept. 29, 1941 (gage height, 25.78 feet); minimum, 1 second-foot July 14, 1934, Remarks.- Records excellent except those above 1,000 second-feet, which are good. Dl- versions above and below station for Irrigation. Station Is above all diversions for Duncan Valley.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr. May June July AUE. Sept. 1 152 75 76 90 86 90 117 75 43 7 42 92 2 137 72 75 90 88 88 109 67 38 6 34 84 3 117 71 81 90 90 86 37 58 36 6 29 7e 4 107 70 86 90 87 84 74 52 34 7 22 69 S 96 71 84 90 37 83 70 54 31 31 17 336 > 6 90 70 81 90 88 31 66 54 23 49 15 283 7 84 67 79 90 92 78. 65 46 25 46 19 120 fi 81 72 83 88 90 75 65 38 20 56 232 101 9 81 74 87 90 88 72 66 37 19 214 148 94 10 80 76 88 92 90 71 104 35 16 81 387 88 11 79 76 88 88 92 72 118 35 15 69 158 32 32 76 80 93 86 93 63 38 SB 16 58 183 77 13 74 79 98 80 37 56 71 38 16 46 165 73 14 74 79 93 76 64 66 75 42 16 37 169 68 IS 72 81 93 78 83 61 84 44 14 31 198 64 69 80 98 76 36 16 98 84 66 45 10 29 398 126 17 67 79 76 88 71 36 46 11. 28 532 71 18 67 80 93 74 87 74 S3 54 11 49 1,890 85 66 83 96 72 84 78 84 55 9 64 3,O20 76 20 . 72 83 93 70 36 88 78 57 9 101 1,040 68 78 83 94 67 87 99 74 60 10 110 583 62 79 as 94 71 87 107 84 57 11 130 390 66 23 80 80 93 74 81 104 92 51 10 256 299 43 24 78 79 90 . 78 84 102 90 45 10 290 251 95 25 78 76 90 83 37 93 87 43 10 284 224 8S 26 73 76 93 84 86 79 40 « 197 198 137 74 79 101 83 36 96 71 41 8 139 173 161 fW 70 80 99 88 S3 93 70 45 8 102 150 165 29 67 80 94 87 102 43 7 79 133 141 30 71 78 90 86 120 70 49 7 63 109 169 31 75 - 90 84 - 120 " 50 "" 52 98 " Seccnd- Runoff in Month foct-days Maximum Minimum Mean acre-feet 2,559 152 66 32.5 5,080 2,312 83 67 77.1 4,590 December...... 2,806 101 75 90.5 5,570 Calendar year 1943 ...... 35,642 353 8 97.6 70,720 2,566 92 2,530 93 81 67.2 2,622 120 84.6 2,463 llay...... 1,494 75 35 48.2 3,960 507 43 7 16.9 2,737 290 6 88.3 5,430 11,302 3,020 15 365 22,420 September...... 3,255 336 48 108 6,460 Water year 1943-44 ...... 37,153 3,020 6 102 73,720 Time basis; Mountain war time to Doe. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 290 " OIU RIVER BASIN

Gila River at New Mexico- Arizona State line-, near Virden, N. Hex.

Location.- Water-stage recorder, lat. 32°41'10", long. 109°03'05", in NEjNEi sec. 3, T. 9'B.j R. 32 E. Gila and Salt River meridian (NEjNWi sec. 6, T. 19 s., R. 21 w. New Msxico meridian projected west of State line), about 790 feet downstream from State line, and 3 miles west of Virden. Drainage area.- 3,360 square miles. Records available.- May 1939 to September 1944. Extremes .- Maximum discharge during year, 3,410 second-feet Aug. 19 (gage height, 5.49 reet); no flow June 24 to July 3. 1939-44: raximum discharge, 39,500 second-feet Sept. 29, 1941 (gage height, 13.64 feet, from floodmarks), from rating curve extended above 2,900 second-feet by com­ parison with peak at station below Blue Creek; no flow at times. Remarks .- Records fair except those for periods of no gage-height record, which are poor. Inversions above station for irrigation.

Discharge, in second- feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 131 54 4S 60 SO 4S 38 54 26 0 32 70 2 92 46 43 78 76 44 36 49 22 0 . 25 58 3 73 40 42 78 71 48 30 44 20 0 19 53 4 65 36 46 76 71 40 21 40 20 1.6 13 50 5 52 31 49 73 73 37 21 37 20 197 12 91 6 40 29 43 73 73 36 20 37 19 91 9.1 387 7 33 23 44 67 73 42 18 35 16 5.7 7.8 100 8 31 32 49 73 71 37 20 27 14 14 84 63 32 43 49 76 78 36 30 26 12 140 136 67 10 36 38 49 73 62 32 42 27 8.7 48 221 60 11 37 33 52 65 49 27 58 25 5.2 24 304 53. 12 35 35 52 69 58 10 49 24 3.3 15 113 52 13 32 35 58 67 49 9J 40 27 2.8 35 94 42 14 32 48 58 65 44 10 54 31 1.9 24 82 41 15 35 49 63 56 42 12 87 35 1.6 18 73 98 16 30 46 63 48 32 12 89 36 1.3 15 216 87 17 26 38 56 50 37 12 92 37 1.0 16 466 21 18 25 35 56 50 40 12 89 42 .8 25 1,160 . 21 19 25 37 56 49 36 10 89 44 a. 5 81 2,780 23 20 29 37 54 44 37 12 85 43 a. 3 26 1,250 20 21 33 42 56 36 3S 16 78 44 .5 40 635 2118 ' 22 40 40 58 32 43 35 80 49 .7 87 426 23 48 40 54 37 44 48 87 43 .2 420 a270 27 24 52 40 49 40 40 42 78 37 0 216 a!90 163 25 50 43 44 58 42 24 69 31 0 186 a!50 76 26 54 42 48 65 40 22 62 27 0 127 a!20 93 27 48 44 49 73 42 20 52 25 0 82 allO 116 28 48 46 49 80 46 14 50 29 0 a60 alOO 112 29 38 49 48 60 48 18 52 27 . 0 a50 aloo 91 30 36 49 50 76 31 48 27 0 42 93 100 31 48 49 80 36 29 36 80 Runoff in Month fSys » Minimum Mean acre-feet Octo 1,386 131 25 44.7 2,750 Nove nber...... 1,200 54 23 40.0 2,380 December...... 1,589 63 42 51.3 3,150 Calendar year 1943 84,117.7 803 0 66.1 47,840 Janu ary 1,927 80 32 62.2 3,820 Febr 1,535 80 32 52.9 3,040 Hare h...... 832.1 48 9.1 26.8 1,650 Apri 1...... 1 1,664 92 ' 13 55.5 3,300 May. 1,088 54 24 35.1 2,160 June 197.8 26 0 6.59 392 July 2,122.3 420 0 68.5 4,210 Augu St...... 9,370.9 2,V80 V.8 302 18,590 September...... 2,274 387 18 75.8 4,510 ffater year 1943-44 ...... 25,186.1 2,780 0 68.8 49,950 Peak discharge.- July 5 (9 p.m.) 2,040 sec. -ft.; July 23 (5 p.m.) 3,280 aec.-ft.; Aug. 11 (9 p.m.) 1,860 sec. -ft.; Aug. 17 (8 a.m.) 1,320 sec. -ft,; Aug. 18 (1 p.m.) 1,780 sec. -ft.; Aug. 19 (5 p.m.) 3,410 sec. -ft. a No gage-height r ecord; discharge computed on baaia of records for station below Blue Creek and diversions In Virden Valley, Time basis: Bount ain war time. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 291

Diversions from Gila River in Duncan Valley, N. Mex.-Ariz.

Duncan Valley lies along Gila River in Hidalgo County, N. Hex., and Greenlee County, Ariz. The part In New Mexico is also known as Virden Valley. The valley extends from a point 8 miles east oJ state line to vicinity of Guthrie,, Ariz. Ten canals, listed-in the following table according to their position from east to west, and several pumps divert water from Gila River for irrigation in the valley. The first four canals listed divert in New Mexico, the others in Arizona. The intake of Sunset Canal-, at eastern end of valley, is 4 miles downstream from station on Gila River below Blue Creek, near Virden, N. Mex. The intake of York Canal at western end is 5 miles upstream from station on Gila River near Clifton, Ariz. Records of daily and monthly diversions are available for Sunset and Moddle Canals for 1914-15 and 1922-31; for Valley and Colmenero Canals for 1914-15 and 1923-31; and for Duncan Canal for 1923-28. Discharge measurements are available for York Canal for 1914-15 and 1923-31. Records of diversion since January 1936, except for Sunset, Moddle, and Shrlver Canals for 1939-44, have been furnished by Gila Water Commissioner appointed by U. S. District Court for Arizona. Water-stage recorders and either rectangular sharp-crested weirs or parshall flumes were used to obtain records on canals, and rated pumps used to obtain records of pumped water. See pp. 313-318 for records of Sunset, Moddle, and Shriver Canals for 1944. The following tabulations of annual ~di versions by each canal and combined monthly di­ versions by. canals as a group have been compiled by Geological Survey.

Annual diversions, in acre-feet, ty each canal during water year 1943-44 and calendar year 1945 Canal Water year 1943-44 Calendar year 1943 14,190 14,120 6,680 7,270 551 612 4,430 4,530 273 147 1,410 1,410 1,630 1,750 977 774 0 0 0 35S Miscellaneous direct pumping.. 56 147 30,200 31,170

Combined monthly discharge of canals diverting from Gila River in Duncan Valley, N. Mex.-Ariz., during water year October 1943 to September 1944

Discharge in second-feet Diversions in Month acre-feet Maximum Minimum Mean 6S 2S 51.5 3,170 63 36 49.9 2,970 December...... 61 34 46.6 2,360 114 2 31,170 4S 6 23.2 1,420 66 7 40.6 2, -340 121 52 S7.7 5,400 114 0 40.2 2,400 21 5 14.6 900 19 5 10.4 619 July...... 106 6 41.1 2,530 121 7 57.0 3,500 69 13 35.2 2,090 Water year 1943-44...... 121 0 41.6 30,200 292 QILA RIVER BASIN

Qlla River near Clifton, Arlz.

Location.- Water-stage recorder, lat. 32°58', long. 109°18'. in SEJ sec. 25, T. 5 S., R. 29 E., at highway bridge, 7 miles south of Clifton and 6 miles upstream from San Francisco River. Datum of gage Is 3,335.3 feet,above mean sea level, datum of 1929, unadjusted. Drainage area..- 4,040 square miles. Records available.- March 1928 to October 1933, May 1935 to September 1944. November 1910 to July 1918 at site 4 miles upstream, published as Oila River at Quthrie. Average discharge.- 14 years (1928-33, 1935-44), 184 second-feet. Extremes.- Maximum discharge during year, 2,610 second-feet Aug. 19 (gage height, 8.38 reetj; minimum, 16 second-feet July 5. 1928-44: Maximum discharge, 28,200 second-feet Sept. 29, 1941 (gage height, 20.12 feet); minimum recorded, 9 second-feet July 8, 1939. Remarks.- Records excellent prior to July 4; good thereafter. Many diversions above station for irrigation, station is below all Duncan Valley diversions.

Discharge, in second-feet, water year October 1943 to Septeaber 1944 Daj Oct. Nov. ' Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 158 63 76 7S 110 66 60 74 40 17 4S 81 f 181 63 76 S6 107 84 63 74 3S 17 45 69 S 96 60 74 99 107 74 60 71 36 17 3S 65 4 36 56 71 104 107 74 54 69 33 IS 30 74 6 7S 56 74 102 107 69 4S SS 30 165 29 ^ 116 6 71 52 76 99 104 71 45 52 29 271 2S 570 7 60 47 76 99 104 69 3S 50 2S 4S 25 175 R 52 47 7S 99 107 71 3S 4S 23 30 24 96 47 50 7S 104 104 69 36 45 26 28 290 SI 10 45 56 7S 107 107 67 52 42 25 91 227 78 45 5S 78 107 96 63 65 3S 24 50 196 71 12 45 5S 81 104 99 5S 76 3S 23 36 521 74 56 S6 102 99 . 47 71 36 23 30 127 142 43 60 88 102 8S 36 65 36 23 35 110 63 15 42 65 91 94 S6 35 81 36 21 33 121 54 16 40 65 91 36 76 32 102 38 20 30 217 276 17 38 65 88 78 71 32 104 40 20 35 S57 113 18 38 65 SS 78 76 33 107 40 20 40 627 58 19 40 63 88 S4 76 33 107 43 19 170 1,780 54 20 40 63 94 64 76 43 107 45 13 54 1,320 50 21 43 63 88 84 76 43 102 45 19 40 654 4S 22 50 67 91 78 76 47 99 47 IS 5S 431 45 23 58 69 88 7S 81 63 102 4S IS 105 310 84 24 63 71 88 SI S4 65 110 47 18 522 223 173 25 67 71 34 81 69 65 99 45 17 193 179 121 26 67 69 61 86 69 56 94 40 17 165 143 84 27 65 69 81 96 71 52 91 36 17 116 127 110 2A 63 74 84 102 74 52 84 35 17 84 113 194 29 60 76 84 104 7S 50 81 35 17 69 104 169 30 54 76 84 102 _ 52 SI 36 17- 65 104 107 31 52 - 84 107 - 5S ~ 35 - 56 SS Second- Runoff in Month foot-days Maximum MininuB Hean ao re-feet

38 December...... 2,567 94 71 82.8 5,090 Calendar year 1943 ...... 34,768 1,870 19 95.3 68,960 2 arch April ...... Uav 1 422 July...... Augu 9,136 1.78Q 24 895 18,120 September ...... 3,495 570 45 116 6,930 Rater year 1943-44 ...... 33,304 1,780 17 91.0 66.060 discharge.- Aug. 17 (5 a.m.) 1,800 sec.-ft.; Aug. 19 (9.-30 p.m.) 2,610 sec.-ft. 0"ls; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To' convert to standard tin subtract 1 hour. GILA RIVER BASIN 293

Glla River near Solomonsvllle, Arlz.

Location.- Water-stage recorder, lat. 32°52', long. H^Sl', In SBfcNEi sec. 31, T. 68., «. iJ8 E., three-quarters of a mile downstream from Intake of Brown Canal, 8 miles northeast of Solomonsvllle, and 13 miles downstream from San Francisco River. Datum of gage is 3,065.09 feet above mean sea level, datum of 1929. Drainage area.- 7,950 square miles. Records available.- April 1914 to September 1932, October 1940 to September 1944, Feoruary 1932 to October 1933, my 1935 to September 1940 at site 3 miles upstream and above Intake of Brown Canal, published as Glla River below Bonlta Creek, near . Solomonsvllle. Records equivalent If Brown Canal diversion Is included wltn records for lower site; records of combined discharge given herein Include that diversion and represent flow at site 3 miles upstream. Average discharge.- 21 years (1921-33, 1935-44), 407 second-feet (Including flow diverted aoove station oy Brown Canal). Extremes (combined flow).- Maximum discharge during year, 15,800 second-feet Sept. 25 (gage neignt, s.oo reet); minimum, 35 second-feet June 30. 1914-44: tfexlmum discharge, about 100,000 second-feet Jan. 19, 1916, by slope-area method; minimum recorded, 27 second-feet July 14, 1939. Remarks.- Records good. Diversions above station for irrigation and mining. No diversion "above station for Irrigation in Safford Valley except Brown Canal. Combined discharge table on following page shows sum of discharge at this station and of Brown Canal. Records of water analyses for the water year 1944 are given In Water-supply Paper 1022. Cooperation.- Record for Brown Canal furnished by Glla Water Commissioner.

Discharge, in sscond-feet, water year October 1943 to Septeaber 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 271 144 147 163 186 157 126 123 66 43 75 126 2 233 144 144 160 183 160 129 123 65 50 68 114 3 192 144 144 173 153 154 132 123 66 108 64 106 4 17O 135 138 173 176 154 126 114 68 74 54 108 5 150 135 141 173 176 144 111 111 6S 68 50 - 362 6 141 126 144 173 176 141 108 106 68 381 52 439 7 132 114 147 173 173 13S 106 97 64 143 57 324 8 117 111 150 170 176 141 103 94 61 51 51 160 111 114 163 170 170 135 106 92 59 105 262 126 10 108 120 170 170 173 132 117 94 54 141 916 126 11 105 123 166 . 170 170 129 129 97 £2 117 465 126 12 103 126 163 170 160 126 135 97 52 89 696 287 13 100 126 160 170 157 117 141 94 52 74 2S5 257 14 94 129 160 170 154 114 135 94 52 64 166 179 15 92 132 160 166 150 111 132 92 52 64 144 823 16 S9 138 160 163 144 117 150 86 50 64 244 424 17 S9 138 160 154 135 126 154 86 46 64 1,110 327 18 84 135 157 150 138 132 157 54 48 110 771 166 19 78 135 154 147 138 135 160 84 48 271 1,930 126 20 238 135 157 150 135 129 160 86 43 180 1,940 117 21 183 135 160 150 135 129 160 86 43 108 913 103 154 135 157 144 144 129 154 84 43 94 576 92 22 144 147 84 43 157 417 S9 «O9T 138 160 138 144 135 24 141 138 166 144 154 141 150 84 43 695 715 24S 25 141 138 163 160 163 144 147 78 41 350 391 2,710 26 141 141 163 173 173 129 144 74 39 243 296 2,630 27 141 141 166 176 166 120 141 71 - 41 192 250 1,900 28 138 141 166 179 16,3 126 135 71 39 144 216 894 29 138 144 170 179 157 126 129 71 37 108 176 1,470 13S 144 170 153 123 129 71 39 94 166 476 30 '- ' ~ 31 150 166 153 126 71 92 144 t Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 4,309 271 78 139 8,558 November 4,005 144 111 134 7 94o December ...... 4,592 170 138 155 9^700 Calendar year 1943 ...... 74, 747 3,130 39 205 145,300 January...... 5,117 183 138 165 10,150 February...... 4,655 186 135 161 9,230 March...... 4,120 160 111 133 5,170 April...... 4,053 160 > 103 135 8,04o May...... 2,822 123 71 91.0 5,600 June ...... 1,547 68 37 51.6 3,070 July...... 4,571 695 43 147 9,070 August...... 13,693 1,940 50 442 27,160 September...... 14,882 2,710 S9 496 29,520 Rater year 1943-44 ...... 63,666 2,710 37 188 136,200 Peak discharge.- Aug. 20 (5 a.m.) 3,020 sec.-ft.; Sept. 25 (9r40 p.m.) 15.800 sec.-ft.; Sept. (5:30 a.m.) 7,130 sec.-ft.; Sept. 29. (2r30 a,«i.) 3,020 sec.-ft. 294 01 LA RIVER BASIN

Combined discharge, in second-feet, of Gila River near Solomonsville and Brown Canal near SolomonsvJLlle, Arlz., water year October 1943 to "September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. . May June July Aug. Sept. 1 273 146 147 163 186 157 129 126 66 43 86 134 ? 234 145 144 160 183 160 132 126 68 50 69 192 144 144 173 183 154 135 126 68 110 65 111 4 170 135 138 173 176 154 129 117 68 77 55 110 5 151 135 141 173 176 148 114 114 68 72 51 369 145 126 144 173 176 147 111 109 68 394 53 5O5 136 114 147 175 173 144 109 100 64 160 58 337 123 111 150 172 176 146 106 97 61 93 82 172 114 114 163 174 170 139 109 96 59 117 267 135 ao 109 120 170 174 173 136 119 96 54 146 936 132 110 123 166 172 170 133 131 99 52 121 495 128 103 126 163 170 160 130 137 99 52 93 726 293 100 126 16G 170 157 121 143 95 52 77 300 264 94 129 160 170 154 118 . 137 95 52 64 173 184 15 92 132 160 166 150 114 134 93 52 64 149 228 89 138 160 163 144 ISO 152 87 50 64 252 430 89 139 160 154 135 129 160 87 46 64 1,130 334 86 139 157 150 138 135 165 85 48 110 791 170 1 G 83 138 154 147 142 138 169 85 48 284 1,950 129 - 20 244 136 157 150 142 132 169 87 43 198 1,950 120 21 188 138 160 150 146 132 169 87 43 121 925 106 156 139 161 144 151 132 163 85 43 107 587 96 144 142 166 138 151 138 156 85 43 173 426 94 141 142 168 144 159 144. 159 85 43 708 724 247 25 142 142 166 160 163 147 156 79 41 359 391 2,710 26 145 144 168 173 173 132 153 75 39 252 296 2,630 27 143 141 171 176 166 123 148 72 41 202 250 1,900 28 138 141 170 179 163 129 139 72 39 155 216 894 29 138 144 170 179 157 129 133 72 37 119 176 1,470 30 138 144 170 183 132 132 71 39 105 171 476 31 150 - 166 183 - 129 - 71 - 102 152 - Seccnd Runoff in Month foot-days Maximum Minimum Mean acre-fast 4,360 273 83 141 8,650 4,033 146 111 134 8,000 December...... 4,921 171 138 159 9,760 Calendar year 1943 ...... 75,971 3,130 39 208 150,700 5,131 183 138 166 10,180 4,692 186 135 162 9,310 4,222 160 114 J.36 8,370 4,198 169 106 140 8,330 May...... 2,873 126 71 92.7 5,700 1,547 68 37 51.6 3,070 4,804 70S 43 155 9,530 13,952 1,950 51 450 27,670 September...... 15,029 2,710 94 501 29,810 Water year 1943-44 ...... 69,762 2,710 37 191 138,400 Time basis; Mountain war time to Dec. 31, 19437 mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GIIA RIVER BASIN 295

Diversions from Glla River In Safford Valley, Ariz.

Safford Valley lies along Glla River in Graham County, Arlz., extending from vicinity of Bonlta Creek on the east to San Carlos Indian Reservation on the west. Twelve canals, listed In following table in downstream order, and one pump divert water frdm Glla River for Irrigation In the valley. Intake of Brown Canal, at upper end of valley, Is three- quarters of a mile upstream from station on Glla River near Solomonsville. Intake of Colvln-Jones Canal, at lower end, Is 11.6 miles upstream from station on Gila River at Black Point and 25.8 miles (revised) upstream from station near Calva. Records of monthly diversion for all canals except Fourness, Fort Thomas, and Colvin- jones are available for 1914-15; records of daily and monthly diversions for all canals except Colvin-Jones are available for 1930-31; records for Brown Canal are available also for water year 1931-32 (Tidwell Canal published as Michelana Canal in records for 1914-15 and 1920-31). Records of monthly diversions for all canals are available for 1936-44. Records of daily diversions since January 1936 have been collected by Gila Water Com­ missioner, appointed by U. S. District court for Arizona. Water-stage recorders with Parshall flumes or weirs were used by water commissioner to obtain records of diversion by canals, and rated pump was used to .obtain record of pumped water. See records for Gila River at Safford for flow of Gila River between intakes of Graham and Smithville Canals. The following tabulation of annual diversion by each canal and combined monthly diver­ sion by canals as a group have been compiled and furnished by Gila Water Commissioner.

Annual diversions, In acre-feet, by each canal during water year 1943-44 and calendar year 1943 Canal Water year 1943-44 Calendar year 1943

33*7

Combined monthly discharge of canals diverting from Glla River In Safford Valley, Arlz., during water year October 1943 to September 1944 Discharge In second-feet Diversions in ' Month acre-feet i Maximum Minimum Mean 248 97 159 9,750 196 151 172 10,220 238 1S3 206 12,660 S27 27 166 121,600 215 126 205169 ' 10,390 253 169 11,800 201 164 186 11,410 204 140 176 10,500 May...... 153 71 108 6,630 76 36 54.1 3,220 500 39 164 10,100 660 55 306 IS, 820 445 0 173 10,300 660 0 173 125, SOO 296 QIU RIVER BASIN

Glla River at Safford, Ariz.

Location.- Recording gage, lat. 32°50'50", long. 109°42'55", In SWiSWi sec. 5, T. 7 S., K. as K., at highway bridge, 1 mile north of Safford and 4i miles downstream from " San Simon Creek. Datum of gage Is 2,880.07 feet above mean sea level, datum of 1929. Drainage area.- 10,460 square miles. Records available.- June 1940 to September 1944. Extremes.- Maximum discharge during year, 13,600 second-feet Sept. 26 (gage height, 10.4 reetj; no flow on many days during summer months. 1940-44: Maximum discharge, 33,000 second-feet Sept. 30, 1941 (gage height, 13.0 feet); no flow at times during summer months. Remarks.- Records good except those for periods of fragmentary gage-height record, which are ralr. Many diversions above station for Irrigation.and mining. Canals diverting In Safford valley above station are Brown, Tldwell, Fourness, San Jose, ^lontezuma, Union, and Graham. Those diverting below station are Smlthvllle, Dodge-Nevada, Curtls, Fort Thomas, and Colvln-Jones. Records, of water analyses for the water year 1944 are given in Water-Supply Paper 1022.

Discharge, la second-fact, water year October 1943 to September 1944 Da? Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 97 38 4S 88 77 f!7 22 14 O a 6 2 46 36 39 90 73 16 20 3 0 3 4 3 S6 42 44 87 66 14 20 3 0 2 4 4 22 43 37 92 S3 14 IS 8 0 0 12 5 33 33 3S 100 43 12 16 7 0 0 383 6 21 35 33 93 42 12 12 6 66 0 561 17 7 29 32 110 45 ' 2019 6 4 -46 0 189 8 flO 26 35 104 42 5 2 64 2 35 9 f4 22 43 90 f30 23 13 3 39 88 17 10 10 23 44 85 20 SO ie 13 17 540 3 11 19 23 54 88 IS 17 2S 13 27 157 88 12 27 15 56 31 20 12 87 14 13 228 108 13 21 IS 54 S2 34 17 27 S - 3 121 91 14 2S 15 57 60 64 15 24 7 3 10 106 15 23 25 62 SO 30 10 . 19 ,11 2 11 46 16 15 36 52 60 19 14 26 10 1 684 878 17 14 38 53 4S 18 25 32 S 1 2,860 166 18 10 34 4S 31 17 27 31 8 86 1,670 69 19 s 33 42 32 13 33 32 8 292 2,210 18 20 31 47 38 10 2S 29 12 35 2,260 4 21 61 31 49 33 13 22 27 14 7 661 2 22 30 2S 49 36 10 23 86 10 10 332 7 23 34 43 SS 17 25 23 6 88 147 3 24 30 38 38 92 34 32 29 10 533 298 180 26 34 36 33 88 47 32 34 7 167 160 3,120 26 34 36 41 68 49 26 31 4 reo 78 4,770 27 54 68 33 18 2S 2 f39 64 1,780 28 55 84 29 15 27 0 S 44 1,870 29 61 49 73 25 21 19 O S 39 1,440 30 2S 53 42 SI 24 15 2 3 IS 619 31 ~ 44 SO - 17 - 0 10 6 Second- Runoff in Month foot-days Maxima Minima Mean ao re-feet 4 997 53 IE 33.2 1,980 December...... 1,409 67 3£ 45.5 2,790 Calendar year 1943 ...... ^r. . . 41,673 3,16O C 114 32,480 2,277 110 31 73.5 4,520 986 77 1C 34.0 1,960 619 33 1C 20.0 1,230 682 34 S 22.7 1,350 242 IS C 7.8 480 0 0 0 0 0 1,608 533 C 51.9 3,190 12,101 2,260 C 390 24,000 September...... 16,742 4,770 £ 626 31,280 Water year 1943-44 ...... 37,626 4,770 C 103 74,480 f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Tlae baala; Mountain war time to Dac. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 28?

Olla River and canals across valley section. near Ifoatcher, Arlz.

Location.- Water-stage recorders on river and canals on section which crosses Glla River at lat. 32°52'25", long. 109°45'45", In NWiNWi sec. 35, T. 6 S., R. 25 E., li Biles north of Tftatcher. Records available.- July 1943 to February 1944 (discontinued). Remarks.- Records good. Record conalsts of combined dally flow of Glla River, Graham, smittivllle, and union Canals, Smlthvllle Canal wasteway, and diversion from Union Canal along Ray lane. Many diversions above valley section for Irrigation and mining. Cooperation.- Water-stage recorder graph for Smlthvllle Canal furnished by Glla water Ooftiml&sToner. , Combined discharge. In second-feet, of Oils Hlver and canals across valley section near Thatcher Arlz., July 1943 to February 1944 1945 1944 Day July Aug. Sept. Oct. Nov. Dec. Jan. Pet.. 1 6S2 52 103 223 Ill 92 126 152 2 242 (e) 88 178 113 96 123 162 3 73 283 57 139 112 110 122 167 4 S3 90 44 114 107 104 140 160 5 63 (e) 40 109 105 112 152 156 6 7S 142 45 64 97 111 155 152 7 56 59 52 78 100 104 135 143 8 51 43 45 61 99 93 119 144 9 34 50 29 43 95 98 120 . 133 10 27 (e) 22 39 68 105 116 138 11 18 (e) 36 51 74 115 112 141 12 23 106 33 61 S9 119 101 98 13 10 100 33 64 104 119 103 9S 14 39 68 34 78 103 121 97 102 15 49 (e) 39 81 85 124 100 88

16 178 (8) 32 69 90 124 94 90 17 100 168 28 74 91 123 92 18 76 37 22 61 85 104 81 _ 19 as 118 23 52 es 105 72 _ 20 S9 115 16 87 S9 116 80 - 21 78 91 22 163 86 106 59 _ 22 182 95 27 101 75 90 75 _ 23 1S5 94 36 S3 74 81 102 _ 24 90 (e) 58 91 79 93 122 _ 25 (e) 475 123 S3 93 112 128 - 26 277 476 (e) 88 86 126 132 _ 27 98 141 (e) 94 104 12S 150 _ 28 85 127 (e) 98 1X>9 111 154 _ 29 el 186 494 95 96 111 150 _ 30 S3 172 310 97 87 117 155 _ 31 S3 129 ~ 100 ~ 122 159 - e Discharge not computed; discharge of Olla River near Thateher for all or part of day exceeded 1,000 second-feet, the limit to which rating curve was defined. Monthly combined discharge, In second-feet, of Glla River and canals across valley section near Thatcher, Arlz., 1943-44 Second- Runoff In Month foot-days Maxiwiffl Minima Mean acre-feet

_ _ Septenber...... - - 16 - - Water yaar ...... - . - - _

December...... :...... 3,392 128 81 109 6,730 ~ _ _ .

February i-ie ...... 2,124 167 88 1S3 *^2iO Time baalai Mountain war time prior to 1 a.m., Jan. 1, 1944; mountain standard time thereafter. To convert war time to standard time subtract 1 hour. 670090 O - 45 - 20 298 01 LA RIVER BASIN ' Gila River and canals across valley section near Glenbar, Arlz. Location.- Water-stage recorders on river and canals on section which crosses Gila River at. lat. 32°56'55It , long. 109°53'50", in SW&SWi sec. 33, T. 5 S., R. 24 E., 4,000 feet northwest of Safford Valley narrows, 1.4 miles downstream from Matthews Wash, and 2.8 miles northwest of Glenbar. Records available.- July 1943 to September 1944 (discontinued). Remarics.- Recorgs~good. Record consists of combined daily flow of Gila River, Curtls, Fort Thomas Consolidated, and Dodge-Nevada Canals. Many diversions above valley section for irrigation and mining. Combined discharge, in second-feet, of Olla Rlv»r and canals across valley section near Glenbar, Ariz., 1943-44

Day July Aug. Sept. Day July Aug. Sepb. Day July Aug. Sept. 1 444 26 54 11 S.6 584 IS ' 21 39 36 9.4 2 234 (e) 43 12 14 106 15 22 46 46 9.6 3 57 257 34 13 9.5 65 19 23 86 37 12 4 33 49 23 14 44 39 20 24 26 (e) 14 5 27 153 17 15 40 (e) 20 25 15 355 21 6 24 212 16 16 77 (e) 17 26 271 , 352 (e) 7 23 86 ia 17 26 175 19 27 50 121 (e) 8 le . 42 22 IS 21 53 14 28 41 55 (e) 9 12 31 24 19 57 65 18 29 40 111 539 10 8.5 (e) 18 20 45 47 9.7 30 33 161 315 31 46 117 - e Discharge not computed; discharge of Gila River near Glenbar for all or part of day ex­ ceeded 1,000 second-feet, the limit'to which rating curve was defined.

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 216 50 72 87 97 39 47 22 19 4.8 7.9 22 2 130 54 71 90 95 42 41 24 SI 5.6 7.4 21 3 S2 57 73 93 90 44 41 23 16 4.9 7.2 18 4 66 63 70 117 89 34 42 26 17 3.9 6.6 17 5 73 6S 78 128 73 35 43 29 14 3.5 4.9 (e) 6 42 71 70 146 77 36 47 25 14 3.6 5.1 (e) 7 29 69 61 139 96 34 49 24 12 23 5.6 201 8 27 80 60 125 90 41 31 23 14 8.2 10 58 9 18 71 79 120 71 48 31 27 5.3 102 113 30 10 20 54 73 118 70 3S 30 34 6.2 19 375 16 11 22 47 87 119 70 35 34 32 7.0 22 202 16 12 20 47 93 lOS 72 39 36 31 8.9 14 124 47 13 32 51 94 105 60 47 21 32 7.3 11 240 68 14 30 49 S2 113 102 45 34 32 7.3 12 48 93 15 34 61 S3 119 64 46 26 27 7.2 11 22 39 16 30 49 96 103 52 45 26 24 6.9 9.8 346 134 17 29 47 9S 90 52 43 37 24 7.3 6.2 (e) 199 18 31 55 79 79 51 47 44 20 5.7 (e) (e) 106 19 20 53 65 71 51 39 41 14 6.3 (e) (e) 55 20 20 50 8S 78 52 37 50 13 6.8 25 (e) 28 21 92 50 87 68 55 34 45 14 7.9 17 734 16 22 8S 42 S6 62 57 32 55 12 7.6 12 380 14 23 S3 36 62 69 53 30 52 7.2 5.9 16 202 24 24 80 44 72 88 56 33 53 5.2 7.7 377 277 (e) 25 52 72 75 101 65 42 54 5.5 8.9 255 225 (e) 26 44 73 101 96 77 26 65 5.1 8.0 39 90 (e) 27 46 S5 105 74 73 27 48 11 8.7 38 88 (e) 28 49 96 65 102 66 24 33 10 7.6 23 45 (e) 29 50 89 61 100 56 25 32 11 7.6 18 52 (e) 30 40 75 57 102 28 25 10 5.9 14 36 (e) 31 42 ~ 64 116 - 39 ~ 19 ~ 8.8 34 (e) e Discharge not computed; discharge of Gila River near Glenbar for all or part of day exceeded 1,000 second-feet, the limit to which rating curve was defined. Monthly combined discharge, in second-feet, of Gila River and canals across valley section near Glenbar, Arlz., 1943-44 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

_ - 9.4 _ - 1,637 216 18 52.8 3,250 1,810 96 38 60.3 December ...... 2,407 105 57 Calendar year ...... - - - - - 3,126 146 62 101 6,200 102 51 70.1 4,030 1,154 48 24 1 37.2 2,290 1,213 65 21 40.4 2,410 Mair 616.0 34 5.1 19.9 1,220 285.0 21 5.3 9.50 565 _ - 3.5 - - _ . 4.9 - - September ...... - - 14 - ~ - Water year 1943-44 ...... - - 3,5 - Time basis; Mountain war time prior to 1 a.m. Jan. 1, 1944; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 299

Gila River and canals across valley section at Fort Thomas, Arlz. ,

Location.- Water-stage recorders on river and canals on section which crosses Olla River at iat. 33°03'00", long. 109°58'05", in SEiSEi sec. 27, T. 4 S., R. 23 E., 650 feet downstream from Fort Thomas road crossing and 0.8 mile north of Fort Thomas. Records available.- July 1943 to December 1944 (discontinued). Remarks.- Records good. Record consists of combined daily flows of Gila River, Fort Tnomas Consolidated Canal, and Colvin-jones Canal. Many diversions above valley sec­ tion for irrigation and mining. Cooperation.- Water-stage recorder graph July 1943 to February 1944 and discharge record October to December 1944 for Colvin-jones Canal furnished by Gila Water Commissioner.

Combined discharge-. In second-feet, of Qlla River and canals across valley section at Fort Thomas, Arlz., 1943-44 1943 Day July Aug. Sept. Day July Aug. Sept. Day July Aug. Sept. 1 224 2.5 45 11 1.2 (9) 4.5 21 3.2 16 4.1 2 231 (e) 27 12 1.0 133 4.3 22 1.8 16 4.4 3 94 313 17 13 .7 60 6.3 23 16 15 6.5 4 15 69 11 14 1.2 36 5.6 24 4.3 > < e > 7.4 5 9.5 '(e)25 9.0 15 IS (e) 4.5 25 5.3 314 7.5 6 S.O 10 16 22 (9) 3.6 26 124 292 (9) 7 5.2 67 S.O 17 22 155 5.1 27 31 131 (e} S 4.5 30 6.4 18 S.5 48 5.3 2S 14 56 (e) 9 3.5 22 5.3 19 15 40 5.4 29 5.S 69 491 10 l.S (e) 4.5 20 15 34 4.9 30 1.1 136 27S (31 1.5 111 - e Discharge not computed; discharge of Gila River at Port Thomas for all of part of day exceeded 1,000 second-feet, the limit to which rating curve was defined.

Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July - Aug. Sept. 1 163 33 52 4S a? 40 27 12 3.5 0.5 0.6 3.6 2 111 3S 63 76 S3 3S 30 10 3.0 11 .4 2.6 3 65 45 65 71 76 42 30 9.4 4.5 1.7 .9 2.4 4 44 51 65 91 71 39 £9 12 2.7 .S 1.1 2.4 5 51 57 66 97 62 33 30 17 1.7 .6 1.1 1.9 6 30 46 57 111 55 2S 29 17 3.4 .6 ,S (e) 7 17 -. 42 47 129 69 24 26 17 4.S 5.7 .5 177 8 14 50 46 117 S3 23 15 16 4.9 3.0 3,9 54 9 15 46 65 110 57 25 16 16 3.5 51 150 21 10 17 32 62 106 57 2S 14 15 2.4 7.4 224 14 11 19 25 66 111 59 2S 13 S.4 2.2 5.2 134 7.7 12 17 36 S5 111 62 21 12 7.9 2.1 3.2 43 14 13 21 35 S4 109 53 24 12 8.9 1.8 3.2 163 40 14 20 43 67 104 70 22 13 , 3.0 2.0 1.6 36 45 15 17 52 64 S9 61 22 15 / 6.2 2.0 2.5 14 19 16 13 41 74 90 4S 23 13 5.5 1.7 3.8 (e) 58 17 S.3 37 SO 74 41 21 15 5.4 2.0 1.1 (e) 115 18 7.1 46 77 72 35 20 17 11 1.7 2.7 (e) 75 491Q 7.5 43 54 55 38 22 23 9.0 1.2 361 (e) 35 20 6.9 46 59 50 29 IS 15 8.5 1.1 15 (e) 23 21 15 3S 62 54 36 19 13 9.1 1.0 1.4 (9) 12 22 41 34 6S 42 34 29 18 S.I 1.7 .6 330 7.1 23 52 28 52 47 35 31 24 4.6 .9 4.1 1S6 29 24 55 23 40 94 40 2S 24 4.3 .S 154 112 (e) 25 38 35 46 101 47 30 23 5.1 .S 241 195 (e) 26 24 46 62 95 55 26 26 4.4 .7 24 5S (e) 27 26 47 94 71 54 26 15 4.0 ,6 16 49 (e) 28 24 56 5S 34 4S 23 10 3.S .8 12 29 (e) 29 36 65 47 84 53 25 12 3.7 .6 1.4 21 (e) I/I 32 57 36 7S _ 25 12 3.4 .6 1.0 13 701 Ov ~ 31 2S - 30 100 - 27 5.6 ~ .S 5.4 - e Discharge not computed; discharge of Qlla River at Port Thomas for all or part of day exei 1,000 second-feet, the limit to which rating curve was defined. 300 01 LA1 RIVER BASIN

Combined discharge. In second-feet, of Qlla River and canals across valley section at Port Thomas, Arlz., 1943-44 Continued 1944 Oar Oct. NOV. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 392 69 £38 2 298 73 224 3 242 64 223 4 196 64 222 5 143 73 210 6 123 92 204 7 114 130 199 8 as 104 206 9 70 95 197 10 60 96 194 11 44 89 185 12 42 87 166 13 36 96 164 14 76 84 123 IS 66 77 102 16 44 92 96 17 39 98 87 18 36 109 85 19 32 166 60 20 29 171 46 21 24 162 46 22 23 162 38 23 22 150 34 24 27 170 34 25 SO 274 39 26 41 430 50 27 43 - 379 48 28 66 323 75 29 118 894 94 30 101 268 126 31 as ~ 123

Monthly combined discharge, In aecond-feet, of Qlla River and canals acroaa valley section at Port Thomas, Arlz., 1943-44 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

September...... _ _ 3.6 _ _ Water year ...... _ _ . .

December...... 1 1,893 94 30 i 61.1 3,750 Calendar year ...... - - _ . - 42 oe n 1,598 835 42 April...... 1 ISO May...... 274.2 17 60.7 937.3 361 1.9 September...... - - - _

Water year 1943-44 ...... _ _ .4 __ _ 392 32 e>rv Q A'tn December...... 3,937 238 34 127 7teio Calendar year 1944 ...... -. - .4 - TOne baa la; Mountain war time prior to 1 a.m.. Jan. 1, 1944; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour-. ailA RIVER BASIN 301 alia River at Black Point, near Geronimo, Ariz. Location.- Water-stage recorder, ,lat. 33°06', long. 110°04', in sec. 10, T. 4 S., R. 22 E., unsurveyed, on San Carlos Indian Reservation, 0.4 mile upstream from Black Point, li miles west of reservation boundary, and 3 miles northwest of (Jeranimo. Datum of gage Is 2,605.18 feet above mean sea level, datum of 1929. Records available.- June 1943 to September 1944. Extremes.- 1943^H: Maximum discharge not determined; minimum dally discharge, 1.3 second- feet June 30, July 1, 2, 7, 1944. Remarks.- Records good except those for periods of no gage-height record, which are fair. ISny diversions above station for Irrigation and mining. Discharge, In aeoond-feet, 1943-44 194S Day June July Aug. Sept. Day June July Aug. Sept. Day June July Aug. Sept. 1 _ (e) 4.1 62 11 _ 4.1 M 12 21 _ 4.4 IS 7.6 2 _ (e) (e) 36 12 _ 2.8 (e) 12 22 2.5 2.8 16 7.6 S _ a3B (e) 27 13 _ 2.2 a61 12 23 2.2 2.2 15 9.1 4 _ alS (e) 22 14 _ 2.8 aS6 11 24 2.0 6.4 (e) 11 e _ al2

Calendar year ...... _ - _ . _ January 1944 ...... 95«7 Karoh...... April ...... by...... 426 9 June...... July...... SOS

September ...... 6.6 _ .

Water year 1943-44 ...... - - l.S - . 302 01LA RIVER BASIN

Glla River at Calva, Aria. '

Location.-- Water-stage recorder, lat. 33°11'10", long. 110°13'10", in sec. 5, T. 3 8., H7Tr~E., unsurveyed, on San Carlos Indian Reservation, at railroad bridge at head of San Carlos Reservoir, li miles northwest of Calva. Datum of gage is 2,514.77 feet above mean sea level, datum of 1929. Drainage area.- 11,490 square miles. ' Records available.- March 1929 to September 1944. Average discharge.- 15 years, 324 second-feet. Extremes.- Maximum discharge during year, 12,800 second-feet Sept. 27 (gage height, 9.48 reetj; no flow on many days during summer months. 1929-44: Maximum discharge, 27,900 second-feet Oct. 1, 1941 (gage height, 11.82 feet); no flow on several days in most years. Maximum discharge known, probably In excess of 100,000 second-feet, occurred Jan. 20. 1916, computed on basis of peaR discharge at stations near Solomonsville and at Kelvin. Remarks.- Records excellent except those above 1,000 second-feet, which are good. Large diversions above station for irrigation. During year 113 discharge measurements were made.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. NOV. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 191 24 60 49 106 74 . 33 20 5.7 0 0.9 8 2 135 26 56 70 100 61 34 20 5.4 0 .4 6 3 96 27 60 79 96 56 34 19 5.1 0 0 5 4 61 34 61 87 83 60 33 19 4.5 0 0 3 5 46 35 61 96 77 58 31 1-9 ,4.0 0 0 2 6 38 37 61 104 70 50 31 19 3.5 0 0 476 7 30 36 56 120 70 49 31 19 2.9 0 0 168 8 24 3S 52 120 83 45 30 IS S.I 1.4 0 92 9 21 46 56 111 83 44 34 17 1.9 .5 23 34 10 20 42 61 109 70 44 33 20 1.4 4.3 150 17 10 " 11 18 34 58 109' 72 45 30 18 1.1 1.4 168 12 17 34 72 ISO 70 42 29 16 .8 0 71 7 13 16 35 85 113 68 40 27 14 .7 0 85 14 14 15 36 S7 109 60 42 25, 14 .5 0 61 15 15 . 15 3S 77 106 77 41 24 12 .2 0 14 22 16 15 44 77 104 6S 39 25 12 .1 0 37 13 17 14 38 81 9S 61 40 23 IS 0 0 1,010 59 18 14 39 85 S9 58 42 24 12 0 0 1,950 91 19 22 46 75 83 54 42 S7 12 0 187 1,150 44 20 14 42 66 66 54 38 28 12 0 66 2,300 18 21 14 45 72 68 48 35 25 12 0 10 1,100 IS 22 18 42 74 64 4S 35 23 11 0 15 454 9 23 31 38 75 61 47 37 23 10 0 13 S19 6 24 33 34 58 75 60 38 23 9.3 0 6 15S 144 25 34 33 55 109 62 36 SI 9.0 0 2S2 184 2,480 26 27 41 64 109 68 34 21 9.0 0 69 80 6,650 27 20 47 96 109 77 33 21 9.0 0 14 40 4,010 28 SI 50 91 87 75 32 22 8.2 0 7 33 1,800 29 23 60 68 102 68 33 21 7.6 0 5 S3 1,620 30 25 61 58 96 _ 33 20 6.5 0 Z 15 . 984 31 23 - 47 98 - 33 - 5.9 - 2 12 - Seccnd- ' Runoff in Month foot-days Maximum Minimum Mean acre- feet October...... 1,091 191 14 35. S S.160 November 1,182 61 24 39.4 , 2,340 December ...... 2,105 96 47 67.9 4,180 Calendar year 1943 ...... 46,987 3,230 0 129 93,130 January...... 2,9S2 120 49 94.3 5,800 . February ...... 2,055 106 47 t 70.1 4,030 March...... 1,331 74 32 42.9 S,640 April ...... 806 34 20 26.9 1,600 May...... 421.5 20 5.9 13.6 836 June ...... 39.9 5.7 0 1.33 79 July...... 6S5.6 222 0 20.2 1,240 August ...... 9,332.3 2,300 0 301 18,510 September...... 18,819 6,650 2 627 37,330 Water year 1943-44 ...... 40,708.3 6,650 0 111 80,740 Time basis! Mountain war time to Dec. 31, 1943; mountain standard tlae thereafter, war time to standard tine, subtract 1 hour. SILA RIVER BASIN " - 303 -Gain or loss in Glla River, Thatcher to Calva, Ariz. in order to determine the net effect on flow of Glla River due to inflow from ground water or loss thereto and evaporation loes from water surface, discharge measurements were made at a number of points along the 45.8-mlle reach of river between the gaging station near Thatcher, lat. 32052'25n , long. 109°45'45", and the gaging station near Calva,. lat. 33°11'10*, long. 110°13'iO'1 . Surface inflows to the river and diversions from the river were also measured. The flow of the river was measured at 14 to 16 established points in each series of measurements, except for those series mad» In July and August 1944. Water-stage recorders were in operation at 9 of these points for all series and at 5 or 6 additional points for the series of measurements made in Hay, June,- and October 1944. Presented herewith are two tables showing net gain or loss in Gila River due to inflow from, or loss to ground water and evaporation loss from water surface. The first table shows the unadjusted gains or losses based on results of measured discharge of Glla River, surface inflows, and diversions. The second table (see next page) shows the adjusted or actual gains or losses derived from results of measured discharge adjusted to a common base within each reach of river channel in order to eliminate the effect of diurnal fluctuation in flow, trend of change In flow, and changes in surface inflow and diversions. Positive figures indicate gains to flow in river channel; negative figures indicate losses. The first line In each table shows mean daily discharge of Gila River at Fort Thomas which is near the middle of the 45.8-mile reach between Thatcher and Calva. Unadjusted gain or loss, In second-feet, In Oila River from Thatcher to Calva, Arls., June 1943'to October 1944 1943 1944 June Sept. Hov. HOT. Dec. Jan. Feb. Bar. Apr. May May June July Aug. Oct. 4,25 le-ie 4,5, 23,25 13,14 13-15 14,15 15-17 12-14 3-5 24-26 21-23 17, 7,S 26-28 9 26 16 IS IS 30 Discharge at Fort Thomas 0.4 2.9 32 26 56 91 49 21 9.0 9.9 4.9 0.9 0.4 0.8 42 Thatcher to Dodge-Nevada Canal heading -1.5 -.5 +1.1 -l.S -1.3 +1.7 -.5 +2.3 +1.3 + .3 -1.9 -.8 _ _ + .3 (2.7 miles) Dodge-Nevada Canal heading to Plma +3.4 +2.5 +7.4 +7.S +12.0 +11.1 +23.3 +9.5 +9.0 +4.9 +4.2 +2.2 _ +6.0 (2.6 Biles) Plma to Fort Thomas Canal heading +1.4 +3.8 +7.5 +10.9 +20.7 +8.0 +10.3 +6.6 +6.6 +6.8 +6.3 +3.0 - - +6.2 (4..1 miles) Fort Thomas Canal heading to Qlenbar -1.0 -.9 +1.3 +2.1 +1.4 +2.6 +4.4 +2.1 +2.0 +1.6 +1.0 + .1 « » -1.8 (1.2 miles) Olenbar to Eden Crossing -.4 + .6 +1.8 +1.2 +2.3 +2.3 +4.0 +3.0 +1.6 +1.7 + .2 -.7 -.9 -.7 +1.7 (1.7 Biles) Eden Crossing to Aahurst + .5 -1.0 -.7 +3.6 +4.5 -.1 +4.7 +5.4 + 4.5 +1.1 + .2 + .4 -.2 + .3 -1.2 (S.S miles) Ashurst to Colvln-Jones Canal heading + .3 +1.2 +1.5 +4.5 +3.7 +12.9 +3.4 +3.3 +3.4 +2.9 +3.1 +1.3 +.S + .8 +1.4 (2.2 miles) Colvin-Jones Canal heading to Fort Thoaa: -.5 -.4 -1.4 -1.1 + .3 -2.2 +3.7 +2.1 + .6 -1.0 -.1 -.7 -.8 -.6 +2.S (1.7 miles) Fort Thomas to ftaah 1.8 miles below Port Thomas -.1 -3.1 + .5 + .1 +1.6 + .S -.9 -.5 -.6 -.4 -1.3 (l.S miles) 4-2.3 >+3.5 >+6.3 +3.8 Wash 1.8 Biles below Fort Thomas to Oeronlmo +7.S +9.0 +6.9 +7.6 +6.2 +5.5 +3.6 +2.3 +2.3 +3.3 +2.2 (2.1 miles) Oeronimo to 1 Bile below Goodwin Wash +S.4 +10.9 f9.0 +6.6 +6.6 +4.7 +4.3 +3.3 +2.4 +6.0 (1.8 miles) 1 mile below +2.7 + 4.6 +7.9 ( +&»2 1-3.9 Ooodwin Wash to Oeronimo Crossing -2.6 -2.5 +4.1 +1.1 -.4 +1.2 +1.5 +1.0 + .9 +2.6 (0.7 miles) Oeronlmo Crossing to Blade Point -3.4 -4.0 +1.1 -.8 +3.2 +3.3 +1.2 +1.8 -2.4 -2.3 -3.5 -4.1 -1.9 -2.2 -3.3 (3.5 miles) Black Point to Bylas -.5 -.3 +2.1 +3.0 -.1 +8.7 +5.4 +2.8 +4.4 + .8 + .8 -1.0 +1.2 -1.1 +1.8 (4.1 miles) \ Bylas to Calva -2.3 -5.3 -6.1 -2.7 +5.2 +6.4 +4.1 +2.5 -.5 -2.2 -3.9 -2.1 -5.1 -4.2 -.5 (10.1 miles) Thatcher to Calva +1.0 +3*8 +29.3 +33.7 +65.4 +69.0 +34.5 +55.S +44.5 t-26.8 +14.9 +3.7 _ _ +22.9 (45.8 miles) 304 01LA RIVER BASIN

Adjusted gain or lose In second-feet, In Oils River from Tbateher to Calva, Arlz., June 1945 to October 1944 1943 1944 June Sept. Nov. Nov. Dec. Jan. Fsb. Mar. Apr. May May June July Get. B4,25 16-18 4,5, 23,25 13,14 13-15 14,15 15-17 12-14 3-5 24-26 21-23 17. 25-28 26 16 18 18 T8 50 Discharge at Fort Thomas 0-4 2.9 32 26 56 91 49 21 9.0 9.9 4.9 0.9 0.4 0.8 42 That oner to Dodge-Nevada Canal heading -1.2 +.6 +1.5 -1.7 -1.3 +1.7 + .7 +2.4 + .1 + .2 -.8 -.6 - - + .8 . (2.7 miles) Dodge-Nevada Canal heading to Plata +2.7 +3.3 +6.0 +8.3 +10.3 +11.1 +17.6 +9.8 +7.6 +6.1 +4.0 +2.2 - +6.1 (2.6 miles) ^ plma to Fort Thomas » Canal heading + .9 +3.5 +5.1 +11.2 +12.6 +8.0 +15.5 +10.3 +7.3 +10.3 +5.8 +2;? - - , +5.9 (4.1 miles) Fort Thomas Canal heading to Qlenbar + .3 + .5 +1.3 +2.1 +1.4 +1.4 +2.0 +2.1 +2.2 +1.7 +.9 +.1 _ _ + .2 (1.2 miles) Qlenbar to Eden Crossing -.3 + .7 +1.8 +1.2 +2.3 +2.3 +4.0 +3.0 +1.3 + .8 +.3 " -.7 -.8 -.7 +1.7 (1.7 miles) Eden Crossing to Aaburat + .4 -1.3 -.7 + .5 +2.1 +1.4 +3.5 +6.7 +4.5 +2.8 0 + .4 -.2 +.2 -1.2 (5.5 miles) Ashurst to Colvln-Jones Canal heading + .2 +1.8 +1.5 +3.6 +3.7 +12.9 +4.6 +3.3 +3.4 +2.6 +2.1 +1.2 + .6 + .6 +2.6 (2.2 miles) Colvln-Jones Canal heading to Fort Thomai -.5 -.9 + .8 -.6 + .3 -2.2 +3.7 +2.1 + .5 -.1 -.2 -.7 -.6 -.5 +2.8 (1.7 miles) Fort Thomas ^ to wash 1.8 miles below Fort Thomas -.1 -3.1 + .5 + .4 +1.6 +.9 + .9 -.4 -.4 0 -1.3 (1.8 miles) n-2.6 >+3.8 +5.4 >+3.8 Wash 1.8 miles below Fort Thomas to Oeronimo +5.6 +7.8 +6.9 +6.8 +5.2 +4.4 +3.6 +2.1 +2.1 +1.4 +2*2 (2.1 miles) Oeronlmo to 1 mile below ! Ooodnln Mash 1 +11.7 +12.1 +9.0 +6.4 +7.6 +5.0 +4.5 +3.1 +2.4 +6.0 (1.8 miles) 1 mile below V+3.2 >+5.3 +7.0 +B.2 J-S.9 GoodHin Mash to Oeronlmo Crossing -2.6 -2.5 +4.1 +1.1 + .4 +2.0 +1.5 +1.0 +.9 +2.6 (0.7 miles) Oeronlmo Crossing to Black Point -4.4 -3.3 +1.1 -2.2* +2.1 +3.3 +1.2 +1.2 -2.2 -1.6 -3.2 -3.9 -2.4 -2.0 -3.3 (3.5 miles) Black Point to Byla s T-2 + .6 +1.0 +2.5 -1.2 +2.3 +2.6 +1,3 +2.0 -.4 + .3 -.8 -.8 I +.4 (4.1 miles) Bylas to - Calva -1.8 -5.0 -6.1 -2.7 +1.3 0 +4.1 +4.0 + .7 -.7 -3.2 -1.9 -5.1 -2.6 -1.8 (10.1 miles) Thatcher to Calva +1.9 +9.6 +25.7 +34.2 +48.2 +56.5 +80.0 +60.9 +42.2 +34.0 +16.5 +3.8 _ _ +23.5 (45.8 miles) GILA. Rim BASIN 305

San Carlos Reservoir at Coolidge Dam, Ariz.

Location.- Water-stage recorder, lat. 33°10'30", long. 110°31'45", in NWi aec. 17, T. 3 S., R. 18 E., unsurveyed, at Coolidge Dam on Glla River. Datum of gage is at mean sea level (Indian Irrigation Service bench mark). Drainage area.- 12,890 square miles. Records available.- November 1928 to September 1944. Extremes.- Maximum contents during year, 331,500 acre-feet Oct. 1 (elevation, 2,459.28 reetj: minimum, 81,000 acre-feet Sept. 25 (elevation, 2,417.80 feet). 1928-44: Maximum contents, 819,200 acre-feet Mar. 18, 1942 (elevation, 2,502.34 feet); minimum (since appreciable storage was attained in 1929), 396 acre-feet July 23, 1939 (elevation, 2,383.33 feet). Remarks.- Reservoir Is formed by concrete multiple-dome dam; dam pompleted Oct. 25, 1928; storage began Nov. 15, 1928. Total usable capacity, about 1,200,000 acre-feet . between elevations 2,383.0 feet (sill of outlet gates) and 2,523.0 feet (top of auto­ matic spillway gates in raised position) above mean sea level. Dead storage below elevation 2,383.0 feet, 10,350 acre-feet according to 1937 survey. Figures given herein represent usable contents. Water is used for irrigation of San Carlos project and for power development, dependent on irrigation demands.

Usable contents at midnight, In thousands of acra-faet, water year October 1943 to September 1944 Daj Dot. NOT. Dao. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 331.0 308.6 290.6 284.2 281.2 281.0 278,0 241.9 209.6 171.4 12S. 1 107.1 2 330.2 308.0 290.2 284.1 281.2 281.3 271.4 240. S 208.5 170.0 126.7 105.4 S 389.6 307.4 289.8 284.0 281.1 881.7 270.5 239.8 207.4 166.4 125.2 103.8 4 32S. 9 306.8 289.4 283.9 281.0 282.0 269.6 238.7 206.4 166.9 123.6 102.1 S 328.1 306.1 289.0 283.9 280.9 282.3 268.7 237.6 205.4 165.4 122.1 100.5 6 387.4 305.4 288.5 283.9 '280.9 282.4 267.8 236.4 204.4 163.6 120.5 99.6 7 326.6 304.6 288.1 283.8 280.7 282.4 266.8 235.2 203.2 161.9 118.9 98.3 8 325.7 303.8 287.8 283.7 280.6 282.0 265.9 234.1 202.1 160.4 117.8 96.9 9 324.9 303,0 287.5 283.6 280.4 281.9 265.0 232.9 200.9 158.8 117.6 95.6 10 324.2 302.4 287.1 283.6 280.1 281.8 264.1 232.6 199.7 157.2 117.4 94.1 / 11 323.5 301.7 286.5 283.5 280.0 281.5 263.4 232.0 198.6 155.5 116.4 92.7 12 322.6 301.2 286.2 283.5 279.7 281.2 262.5 231.1 197.4 153.9 115.1 91.4 IS 321.7 300.6 285.9 28S.5 279.4 280.9 261.4 230.1 196.2 152.4 113.4 90.0 14 320.7 300.0 285.6 283.5 279.0 280.7 260.3 228.9 195.0 150.9 111.9 88.7 IS 319.8 299.4 285.4 283.4 278.8 280.8 259.3 227.8 193.8 149.4 110.4 . 87.3 16 318.9 298.9 285.1 283.4 278.6 280.6 258.1 226.5 192.5 148.0 109.2 87.3 17 317.9 298.4 285.0 283.3 278.4 280.5 257.1 225.4 191.3 146.6 110.0 86.8 18 317.2 297.8 284.8 283.2 278.1 280.4 256.0 224.4 190.1 145.2 113.3 S6.0 19 316.9 297.2 284.7 283.0 273.1 280.2 255.0 223.4 188,8 143.8 115.0 85.2 20 316.4 296.7 284.7 282.8 278.3 279.9 254.1 222.3 187.5 142.6 117.9 84.4 21 315.9 296.2 284.6 282.6 278.7 279.5 252.8 221.2 186.0 141.2 119.3 83.5 22 315.3 295.7 284.5 288.4 278.8 279.1 251.7 220.2 . 184.7 140.2 119.1 82.7 25 314.7 295.1 284.4. 282.2 278.7 278.7 250.7 219.1 183.3 139.1 118.8 81.8 24 314.1 294.5 284.3 882.3 278.9 278.1 249.6 218.0 181.9 138.2 118.1 81.1 25 313.5 894.0 284.2 282.2 279.1 277.4 248.5 , 216.9 180.4 137.4 117.2 84.4 26 318.9 293.4 284.6 282.0 279.3 276.7 247.5 215.8 178.9 136.2 116.1 91.2 27 312.2 292.8 284.6 281.9 279.7 275.9 246.2 214.9 177.4 134.8 114.8 100.7 28 311.6 292.3 284.6 281.7 280.0 275.1 245.0 213.8 175.9 133.4 113.5 103.8 29 310. 6 291.7 284.5 281.6 280.5 274.4 244.0 212.8 174.4 132.2 112.0 105.8 30 310.1 291. 1 284.4 281.5 273.6 242.9 211.7 172.9 130.8 110.4 107.4 SI 309.4 284.3 281.4 - 272.8 - 210.7 129.5 108.7 - Monthly elevation and contents, water year October 1945 to September 1944 Change In contents Date Elevation Contents during month (feet)t (acre-feet) (acre-feet) _ -21,800 £ 454 44 Dec. 31...... 2,453.59 284,300 -6,800 Calendar year 1943... _ - -246,200 -2,900 -7,700 -29,900 -32,200 -37,800 -43,400 -20,800 Sept. 30...... 2,424.63 107,400 -1,300 Water year 1943-44... - - -223,800 t Elevation at midnight. Time basis; Mountain war time to Dec. 31, 1943; mountain standard tine thereafter. (To convert war time to standard time, subtract 1 hour. 306 01 LA. RIVER BASIN

Gila River below Coolldge Dam, Arlz.

Location.- Water-stage recorder and Parshall flume, lat. 33°10'15", long. 110°31'45", In SWt sec. 17, T. 3 S., R. 18 E., unsurveyed, 2,200 feet downstream from Coolldge Dam. Datum of gage Is 2,309.94 feet above mean sea level (Indian Irrigation Service bench mark). Drainage area.- 12,890 square miles. Records available.- April 1914 to September 1944. July 1899 to November 1905, at site 8 mnes upstream, below mouth of San Carlos River. August 1910 to February 1911 at site 9 miles upstream, above mouth of San Carlos River. Average discharge.- 14 years (1914-28), 636 second-feet (unregulated); 16 years (1928-44) an secona-reet (regulated). Extremes.- Maximum discharge during year, 861- second-feet Aug. 7 (head on flume, 3.52 reet;; minimum dally, 3 second-feet Mar. 1. . 1914-28 (unregulated): Maximum discharge, 130,000 second-feet Jan. 20, 1916, computed on basis of peak discharge at Solomonsvllle and at Kelvin; no flow for several periods. 1928-44 (regulated): Maximum discharge, 1,240 second-feet July 31, 1937 (head on flume, 4.35 feet); no flow on several days In most years. Remarks.- Records excellent. Crest width of Parshall flume, 30 feet. Large diversions aoove San Carlos Reservoir. Flow regulated by San Carlos Reservoir since Nov. 15, 1928 (see preceding page).

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 359 359 £65 120 161 3 423 560 450 768 679 77£ 2 356 357 £68 120 153 17 420 543 474 79£ 7£1 77£ 3 356 311 268 1£0 147 34 432 553 518 792 75£ 768 4 556 326 268 1£0 148 38 487 591 506 788 778 75£ 5 359 351 £68 120 165 24 499 591 509 784 77£ 744 6 359 351 £68 120 164 103 499 591 509 780 768 744 7 359 351 £68 1£0 151 151 499 591 51£ 792 778> 738 8 359 354 £68 1£0 146 155 529 591 512 756 781 717 9 359 332 265 116 170 160 549 588 526 764 £87* 717 10 359 311 268 114 203 155 490 41£ 543 768 £08 713 11 354 313 262 118 £03 ISO 441 388 560 768 683 713 If, 388 313 £6£ US £05 £07 444 453 563 768 756 709 13 456 316 248 118 226 £1£ 512 506 563 748 796 713 14 462 316 219 106 212 16£ 543 546 560 736 748 713 15 462 313 £03 149 £34 103 546 546 553 717 698 664 16 462 313 193 166 203 135 546 549 549 705 565 407 17 459 313 171 ISO 203 171 539 519 598 705 847 354 IB 459 313 137 186 £05 171 522 512 687 701 23 496 19 374 313 125 200 13 173 522 509 630 705 295 496 20 E30 313 1£5 191 4 173 536 509 630 736 487 496 21 305 313 1£2 203 4 . 173 549 509 6 £7 752 549 496 22 303 313 122 210 51 £56 553 487 649 718 588 496 2? 303 313 1£2 210 133 305 553 509 682 627 598 490 24 E98 313 122 216 , 67 305 553 509 6S£ 459 598 490 25 300 313 12£ ££3 23 376 553 509 682 468 616 354 26 300 316 122 £10 23 417 563 509 73£ 579 620 £85 ?7 321 318 12£ 20£ 23 423 598 496 768 717 649 435 m 348 316 1£0 186 13 423 594 484 768 717 660 444 29 356 316 1£0 161 4 423 577 465 764 679 701 408 30 359 £95 120 175 4£3 563 450 768 649 75£ 356 31 359 - 1£0 175 - 423 - 450 - 652 . 772 - Second- Runoff in' Month foot-days Maximum Minimum Mean acre-feet 230

March...... April...... 15,634 593 420 521 31,010 May...... :.... 591 388 31,790 18,008 768 450 600 35,720 July...... 22,190 79£ 459 716 44,010 18,793 796 23 606 37,280 September...... 17,440 772 285 581 34,590 Hater year 1943-44 ...... 149,953 796 3 410 897,400 Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 307

Cila River at Winkelman, Ariz.

Location.- water-stage recorder, lat. 33°00', long. 110°46', in NWiNEi sec. 13, T. 5 S., R. ib E., li miles north of Winkelman, 2i miles upstream from San Pedro River, and 29 miles downstream from Coolidge Dam. Datum of gage is 1,921.03 feet above mean sea level, datum of 1929. Drainage area.- 13,280 square miles. Records available.- September 1941 to September 1944. September 1917 to June, 1918 (prior to Closing of Coolidge Dam) and December 1928 to September 1933 (discharge measurements only) at site 1.5 miles downstream. Extremes.- mxlmum discharge during year, 55,000 second-feet Aug. 9 (gage height, 18.40 reet), by slope-area method; minimum, 21 second-feet Feb. 23, Mar. 2. 1941-44: Maximum discharge, that of Aug. 9, 1944; minimum, that of Feb. 23 and Mar. 2, 1944. Remarks.- Records excellent. Large diversions above station for irrigation, Flow regulated by San Carlos Reservoir (see p. 305).

Dischargs, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. " Dec. . Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 349 365 281 120 164 26 407 572 464 732 625 757 Z 353 369 274 120 158 22 399 550 460 757 702 757 3 353 323 271 122 157 28 399 536 522 771 720 750 4 561 316 268 121 151 51 439 581 514 771 764 744 5 361 349 271 121 149 52 486 600 514 764 764 714 6 357 357 268 121 171 42 496 600 504 757 764 714 7 353 353 271 117 165 131 500 600 504 764 875- 696 8 357 353 236 115 150 157 514 600 491 787 S73- ) 675 9 357 353 273 113 153 165 576 600 500 726 6,310* 665 10 357 309 2SS 109 200 165 554 565 514 744 233- 665 11 349 303 263 109 200 162 455 311 550 744 468 665 12 349 306 £68 105 200 199 455 439 550 744 702 711 13 412 309 271 105 198 211 478 451 545 732 720 655 14 444 309 239 105 226 217 550 550 545 70S 690 645 15 44S 309 202 99 277 138 554 558 540 685 620 716 16 452 305 202 141 139 109 554 550 540 665 606 648 17 452 309 191 147 192 155 554 545 554 665 383 324 18 452 312 164 160 195 194 527 509 620 665 185 435 19 346 309 13& 170 150 , 218 518 509 620 665 113 4S2 20 242 309 131 178 43 160 518 509 615 690 456 482 21 284 309 129 172 25 153 540 509 610 732 486 482 22 292 309 127 188 23 164 540 484 «15 750 558 482 23 292 309 127 188 77 '290286 540 500 665 697 568 478 24 292 309 124 247 137 540 514 665 496 576 473 25 28S 312 124 257 97 309 536 5 IS 665 3S7 581 489 26 292 312 134 212 49 411 540 518 670 562 590 314 27 «. . 295 312 134 202 44 415 576 518 750 6S5 605 345 28 340 312 122 22S 41 407 590 504 750 690 635 455 29 349 312 120 170 37 407 5S6 486 764 6SO 660 391 30 357 316 120 164 _ 407 572 464 732 625 708 371 31 361 - 122 179 - 403 - 464 - 630 - 744 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 11,246 646 . 242 363 22,310 November...... 9,643 369 306 321 19,130 December...... 6,173 2S1 120 199 12,240 Calendar year 1943 ...... 181,451 1,370 J.08 497 359,900 January...... 4,705 257 99 152 9,330 February...... 4,018 277 23 139 7,970 March...... 6,254 415 22 202 12,400 April ...... 15,493 590 399 516 30,730 May...... 16,214 600 311 523 32,160 June ...... 17,552 764 460 585 34,810 July...... 21,470 787 387 693 42,590 August ...... 24,284 6,310 113 783 48,170 September...... 17,180 757 314 573 34,080 Water year 1943-44 ...... 154,232 6,310 22 421 305,900 Tlae basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 306 01U RIVER BASIN

Oila River at Kelvin, Arlz.

Location.- Water-stage recorder, lat. 33°06'15", long. 110"58'45", In NWi sec. 12, T. 4 s., ri. 13 E., at Kelvin, 1,000 feet downstream from Mineral Creek, 15 miles downstream from San Pedro River, and 19 miles upstream from Ashurst-Hayden Dam. Datum of gage is 1,743.27 feet above mean sea level, datum of"1929. Drainage area.- 18,000 square miles. Records available.- January 1911 to September 1944. Average discharge.- 17 years (1911-28), 760 second-feet (unregulated); 16 years "second-feet (largely regulated). Extremes.- Maximum discharge during year, 28,000 second-feet Aug. 9 (gage height, 10.95 reetj; minimum, 65 second-feet Feb. 23, 24. 1911-44: Maximum discharge, about 132,000 second-feet Jan. 20, 1916 (gage height, 19.5 feet), from rating curve extended above slope-area determination at 82,000 second- feet; minimum, less than 1 second-foot In simmers of several years prior to 1929. Remarks.- Records good. Large diversions for Irrigation above station. Flow regulated oy san Carlos Reservoir (see p. 305 ); no other regulation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 S97 370 300 152 202 248 409 538 420 706 621 753 2 384 365 280 152 183 , 221 420 525 414 715 680 783 JJ 374 348 276 155 192 357 409 518 460 733 715 753 4 374 327 269 155 186 256 420 538 497 753 764 753 S 374 340 273 155 183 198 473 574 491 743 764 727 6 361 361 269 158 192 147 497 574 491 733 774 761 7 366 361 276 158 199 141 497 566 479 724 828 761 8 366 361 284 155 180 173 511 566 473 774 1,080 744 9 366 361 288 152 174 176 582 566 473 715 9,130 711 10 374 348 286 152 196 179 566 628 491 774 2,160 702 11 370 327 280 152 221 176 491 376 525 774 530 694 1? 366 323 276 152 216 188 460 363 538 733 727 677 13 397 323 292 147 221 204 460 398 538 715 814 788 14 440 323 276 147 231 224 538 473 525 668 823 719 IS 460 323 244 144 244 224 552 511 518 680 823 766 16 460 323 226 166 261 207 545 511 511 662 768 802 17 460 327 21S 186 237 207 538 516 511 653 983 462 18 466 323 202 192 221 267 532 485 574 653 585 461 19 1,100 323 177 208 214 545 525 473 597 653 568 506 20 398 323 163 216 121 300 525 473 589 671 472 500 21 388 323 163 211 62 224 536 473 582 697 533 500 22 327 319 160 218 74 . 214 552 473 582 733 596 500 XX 323 319 158 218 67 268 538 450 613 928 614 506 ?4 311 323 158 237 204 295 525 491 644 951 636 584 25 ' 307 323 15S 311 567 295 516 491 636 538 606 1,550 26 303 323 174 276 730 368 525 491 636 511 638 592 ?7 303 319 192 2S1 516 409 545 485 715 671 606 432 28 327 323 163 234 412 404 574 479 743 697 638 520 29 357 319 156 228 303 409 574 473 743 697 638 449 SO 370 319 156 205 ,_ 409 545 442 743 644 694 426 31 370 155 205 - 409 ~ 425 ~ 621 727 - Second- Runoff In Month foot-days Maxima Minima Mean aore-feet 1 o O«Q 28£ 395 24,280 9 991 333 19,820 Decenber...... 6,953 300 15S 224 13,790 Calendar year 1943 ...... 210,980 2,350 15E 578 418,500 311 144 189 11,600 730 67 242 13,950 8,342 545 143 269 16,550 April...... 15 ,384 582 40S 513 30,510 May...... 15,357 626 36! 495 30,460 16,752 743 4141 558 33,230 21,940 951 511 708 43,520 31,573 9,130 47 £' 1,018 62,620 September ...... 19,842 1.550 426 661 39,360 Water year 1943-44 ...... 171,254 9,130 6"' 466 339,700 Time basis: Mountain war tlae to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 309 Glla River at Ashurst-Hayden Dam, near Florence, Ariz.

Location.- Water-stage recorder, lat. 33°06', long. 111°15', In NWi sec. 8, T. 4 8., R. 11 E-, at Ashurst-Hayden Dam, 10 miles northeast of Florence. Permanent crest of dam Is 1,562.6 feet above mean sea level, datum of 1929. Crest height varied between 1.00 and 1.34 feet during year by use of flashboards. Florence-Casa Grande Canal diverts at left end of dam for Irrigation of lands under San Carlos Project. Drainage area.- 18,300 square miles. Records available.- July 1923 to September 1944 (head on crest of dam only). Records of diversions to Florence-Casa Grande Canal available January 1928 to September 1944. Kxtreass.- Jfexiraum head pn dam during year, 2.2 feet Aug. 9; no flow over dam greater part of year. 1923-44: Ifexlmum head on dam, 8.0 feet Sept. 28, 1926; no flow over dam greater part of each year. Remarks.- Records show dally mean head on dam and monthly diversions to Florence-Casa Grande Canal. Mean head is often not representative of flow passing dam because of extensive sluicing. Diversion records are those at canal gaging station (water-stage recorder and Parshall flume) 2.6 miles downstream at China Wash adjusted for interven­ ing sluicing and pumping (but not natural losses) to show water available at dam, ex­ cept for water passed over dam or sluiced through dam during times of flood runof-f. mny diversions above station for Irrigation. Flow regulated by Coolldge Dam except for periods of tributary inflow below that dam. San Pedro River contributes major portion of unregulated Inflow. Cooperation.- Records collected and prepared In cooperation with Office of Indian Affairs. Dally mean head, in feet, water year October 1943 to September 1944 Da, Oct. Nov. Pec. Jan. Feb. Map. Apr. May June July Aug. Sept. 1 0 0 0 0 (t) 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 .04 0 0 0 0 0 4 0 0 0 0 .06 0 0 0 0 0 S 0 0 0 0 0 0 0 0 0 0 6 0 0 0 0 0 0 0 0 0 0 7 0 0 0 0 0 0 0 0 0 .03 8 0 0 0 0 0 0 0 0 .14 0 9 0 0 0 0 0 (t) 0 0 .97 0 10 0 0 0 OS- 0 0 (t) (T) . .46 0 11 0 0 0 (t) 0 (t) 0 0 0 0 12 0 0 0 0 0 0 0 0 0 0 13 0 (t) 0 0 0 0 0 0 0 0 14 0 0 0 0 0 ft) 0 0 0 (t) IS 0 0 0 0 0 0 0 0 0 0 ".02 16 0 0 0 (t) 0 0 0 0 0 17 0 0 (t) 0 0 0 0 0 .12 .04 IB 0 0 0 0 0 0 0 0 0 (t) 19 .21 0 0 0 (t) 0 0 0 .03 .02 20 0 0 0 0 0 0 0 0 0 0 21 0 0 (t) 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 (t) 0 0 23 0 0 0 0 0 0 0 .05 0 0 24 0 0 o 0 0 0 0 .08 0 0 25 0 0 (t) .04 0 o 0 0 0 .23 26 0 0 (t) .04 0 0 0 0 0 .07 27 0 0 0 (t) 0 0 0 0 0 0 28 0 0 0 0 0 .01 0 0 0 (t) 29 0 0 .01 0 0 0 0 0 0 0 30 0 0 0 H 0 0 0 0 & 0 31 0 0 0 - 0 - 0 0 0 - t Flow over crest for short time, but mean head for day was less than o.01 foot. Hota.- Water below cr««t of dam during months left blank and on days shown by zero.

Monthly diversions to Florence-Casa Grande Canal, water year October 1943 to September 1944 Discharge In second-feet Runoff Water sluiced Month In above f lone Maximum Minimum Mean acre -feet (acre-feet )$ 731 264 377 23,160 260 359 306 321 19,090 179 309 144 221 15,580 105 997 61 503 363,900 6,340 300 130 174 10,700 44 480 3 204 11,730 48 468 109 238 14,640 69 565 390 488 29,020 428 598 340 468 28,760 436 654 386 497 29,580 502 818 495 653 40,160 591 840 299 642 39,450 589 860 370 609 36 ,220 567 660 3 408 296,100 3,820 I Included In first four columns of table. Time basis: Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To conver£~Va» time to standard time, subtract 1 hour. 310 QILA RIVER BASIN

Glla River near Laveen, Arlz.

Location.- Water-stage recorder above concrete diversion dam. lat. 33°15' long 112°10» in swtNWi sec. 16, T. 2 S., R. 2 E., on Glla River Indian Reservation, at highway ' bridge, 1* miles south of Komatke, 8 miles south or Laveen, and 8 miles upstream from Santa Cruz River. Auxiliary water-stage recorder on overflow channel located a quarter of a mile south. Drainage area.- 20,200 square miles. Records available.- January 1940 to September 1944. Extremes.- Maximum discharge during year, 1,330 second-feet Aug. 11 height, 5.83 reet); minimum daily, 4 second-feet on many days during year. 1940-44: Maximum discharge, 11,900 second-feet Jan. 2, 1941 height, 9.33 feet); no flow at times during summers of 1940, 1943. Remarks.- Records good. Records include flov over dam, through sluice gate In dam, and in overflow channel, but do not Include flow In Cooperative Canal, which diverts at dam (see table of miscellaneous discharge measurements). Overflow channel carried 12 acre-feet during year. Large diversions above station for Irrigation. Flow partly regulated by San Carlos Reservoir (see p. 305).

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 £5 5 18 28 26 £2 29 6 6 9 6 10 2 23 6 la 27 26 23 27 6 4 9 5 10 3 23 6 20 27 25 22 27 6 4 9 5 10 4 22 6 20 27 26 22 £7 6 5 8 5 10 5 £1 6 21 28 25 22 £2 6 5 8 5 10 6 16 7 21 28 25 22 19 7 5 S 4 10 7 10 7 19 28 26 22 19 7 6 7 5 10 8 9 7 19 2S 26 21 18 7 6 7 6 10 9 9 7 20 2S 26 20 IS 8 6 7 6 10 10 9 8 22 2S 26 20 16 8 5 7 94S 8 11 9 8 21 27 26 23 19 8 5 7 798 7 12 8 8 21 27 25 23 19< 8 5 6 69 6 13 4 9 22 27 25 S3 18 9 6 6 27 6 14 5 9 22 28 25 24 17 9 6 6 22 6 15 4 9 22 28 25 23 17 9 6 6 15 7 16 4 10 22 28 25 23 17 10 7 6 13 7 17 4 10 22 29 24 24 16 11 7 6 12 7 18 4 10 23 29 24 24 16 11 8 6 12 7 19 4 10 23 29 24 24 11 12 8 5 17 7 20 68 11 23 29 22 23 4 12 8 5 12 7 21 16 11 24 30 22 24 5 13 9 5 11 7 22 5 12 25 30 21 24 6 15 9 5 10 7 23 4 12 25 30 21 24 5 15 9 6 10 7 24 4 12 25 32 23'22 24 5 15 9 5 10 7 25 5 13 25 30 25 5 13 9 6 10 7 26 4 14 26 28 22 26 5 13 9 6 10 125 27 4 14 25 26 23 26 6 9 10 6 10 60 28 5 15 25 26 23 27 6 4 10 6 10 21 29 5 16 25 25 22 28 6 4 9 6 10 10 30 5 17 26 25 _ 29 6 4 9 6 10 10 31 5 - 27 25 - 29 - 4 6 10 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 343 68 4 11.1 680 November ...... 295 17 5 9.S 585 December ...... 697 £7 18 22.5 1,380 Calendar year 1943 ...... 11,634.4 1,340 .1 31 o9 £3^070 January...... 865 32 35 C7«,9 1,720 February...... 701 26 El 24^2 1,390 March...... :...... 736 29 20 1,460 April ...... 433 29 4 14J4 859 May 275 15 4 8« 9 545 June ...... 210 10 4 7.0 417 July 201 g 5 6.5 399 August ...... 2,093 948 4 67.5 4 *845150 September...... 426 125 6 14.2 Water year 1943-44 ...... 7,075 948 4 19.9 14,430 Time basis; Mountain war time to Dec. 31, 1943; ntain standard time thereafter. To convert war time to standard time, subtract 1 hour. QILA RIVER BASIN 311

Oila River below Glllespie Dam, Ariz. Location.- Water-stage recorder above left end or Gillespie Dam, lat. 33°14', long. 112U45', In SEiNEt sec. 28, T. 2 S., R. 5 W., 8 miles downstream from Hassayampa River. Average elevation of crest of dam is 753.46 feet above mean sea level, datum of 1929, and 5 feet above datum of gage. Gillespie Canal diverts from left bank and Enterprise Canal diverts from right bank at Gillesple Dam. Drainage area.- 49,600 square miles. Records available^- August 1921 to September 1944 4river only). Records for Gillespie Canal Way 1935~to September 1944; for Enterprise Canal June 1935 to September 1939 (discharge measurements only) and October 1939 to September 1944. Records of monthly discharge (river only) prior to October 1938 republished in Water-Supply Paper 918. Extremes.- Maximum discharge during year, 580 second-feet Feb. 25 (height over crest of dam, 0.29 feet); no flow for several periods during year. 1921-44: Maximum .discharge, 70,000 second-feet Dec. 28, 1923 (height over crest of dam, 6.0 feet), by computation of flow over dam; no flow for several periods in each year. Maximum discharge known, 250,000 second-feet (estimated) in February 1891. Remarks.- River records good except those below 100 second-feet and those for days when sluicing occurred Aug. 11, 12, 13, which are fair. Records published below include flow over crest and through sluice gates of Gillespie Dam but do not include flow in Gillespie and Enterprise Canals which divert from river Immediately above dam. Other diversions above station for irrigation. Flow of Gila River and tributaries above ttils station is regulated by San Carlos Reservoir on Gila River (capacity, about 1,200,000 acre-feet), by a series of reservoirs on Salt River (capacity, 1,771,000 acre-feet), by Bartlett Reservoir on Verde River (capacity, 179,500 acre-feet), and by Lake Pleasant on Agua Fria River (capacity, 178,000 acre-feet). For records of combined flow of Gila River, Gillespie Canal, and Enterprise Canal, and for monthly records of Gillespie Canal and Enterprise Canal, see following page. Records of diversion by Gillespie Canal obtained through use of water-stage recorder In SEiNEi sec. 28, T. 2 S., R. 5 W., 200 feet downstream from head gates. Records of diversion by Enterprise Canal obtained through use of water-stage recorder in sec. 28, T. 2 S., R. 5 W., 600 feet downstream from intake.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 0 100 IS 230 0 0 2 0 80 20 160 0 0 3 0 120 35 205 0 0 4 0 38 30 205 0 0 5 0 14 14 ISO 0 0 16-0 < 6 0 12 S 0 0 7 0 1 S4 140 0 0 8 0 2 120 100 0 0 9 0 1 3S 74 0 0 10 0 0 IS 33 0 0 11 0 0 23 28 0 50 12 0 0 20 24 0 380 13 0 0 26 14 0 70 14 0 0 28 22 0 0 15 0 0 22 74 0 0 16 0 60 102 65 0 0 17 0 0 140 13 0 0 18 0 0 11s 0 0 0 19 0 0 50 0 0 0 20 5 0 43 0 . 0 0 21 10 0 60 0 0 0 22 65 0 65 0 0 0 23 100, 0 50 0 0 0 24 100 0 102 0 0 0 25 100 26 372 0 0 0 26 100 44 305 0 0 0 27 so 65 355 0 0 0 28 65 39 305 0 57 0 29 SO 25 280 0 56 0 30 100 40 _ 0 0 0 31 100 38 - 0 - 0 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre- feet

December...... 905 100 0 29.2 l.SOO Calendar year 1943 ...... 7,694 1,640 0 21.1 15,250

trtn P March...... llay...... 0 0 0 0 0 September...... 0 '0 0 0 0 Water year 1943-44 ...... 6,795 3SO 0 IS. 6 13,490 312 GILA RIVER BASIN

Combined discharge. In second-feet, of Oila River below Qlll»aple Dan and of Glllesplo and Enterprise Canals at Glllesple Dam, Arlz., water year October 1945 to September 1944 Day Oct. HOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. I 169 81 105 277 164 396 160 138 96 57 54 51 2 135 81 113 257 166 326 157 140 96 55 51 52 3 105 82 113 293 181 369 155 137 92 54 48 55 4 92 83 115 208 173 372 154 136 88 50 49 58 5 86 82 118 184 160* 346 147 136 89 58 49 55 ' 55 6 78 82 126 134 158 330 142 141 88 54 54 7 V2 83 131 171 227 311 138 141 83 50 56 51 8 V5 90 127 171 269 278 134 138 84 47 70 44 9 64 90 132 172 191 254 138 131 84 42 67 44 10 64 90 163 166 173 21S 146 151 82 45 73 52 11 66 91 168 166 178 207 152 135 82 45 144 52 12 65 87 164 167 L76 200 155 130 84 44 539 50 13 64 85 166 161 182 194 150 131 77 38 163 67 14 66 86 168 154 184 203 150 130 75 56 117 47 15 68 98 164 151 178 253 148 129 72 34 94 96 16 68 97 166- 156 257 246 150 123 73 34 86 162 17 70 92 168 125 298 194 154 124 73 36 85 183 18 71 90 161 136 273 179 158 127 73 35 78 142 19 88 97 160 142 212 178 156 126 74 56 73 97 20 112 100 174 142 208 174 150 121 80 37 73 70 21 85 99 187 146 219 172 156 120 64 37 72 50 22 78 110 245 147 219 170 152 114 65 38 66 46 23 75 110 ogo 148 207 168 141 113 66 57 66 46 24 77 110 282 144 256 166 135 111 67 77 62 46 25 72 110 281 164 521 162 130 106 61 65 62 54 26 76 109 277 190 453 158 126 105 54 60 61 52 27 68 109 255 201 505 161 122 107 55 63 64 59 28 67 103 240 181 460 161 157 108 68 54 61 80 29 67 HI 257 171 447 168 115 107 59 52 58 78 30 71 106 279 186 164 132 109 57 52 57 73 31 77 - 277 184 - 160 - 102 - 52 53 -

Socond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

81 December...... 5,764 282 105 186 11,450 Calendar year 1943 ...... 47,806 1,850 36 131 94,800 125 176 10,800 521 158 252 14,470 March...... 227 13,950 April...... 160 115 146 8,660 May...... "96 102 124 7,650 2,249 54 75.0 4,460 77 34 2,960 2,705 539 48 87.3 5,870 September ...... 2,057 183 44 68.6 4,080 Water year 1943-44 ...... 47,682 539 34 130 94,380

Monthly diversio In second-feet, by Glllesple and Enterprise Canals at Glllespie Dam, water year October 1945 to September 1944 Glllesple Canal Enterprise Canal Runoff in Runoff In Maximum Minimum Mean acre -feet Maximum Minima Mean acre-feet 162 52 69.3 4,260 14 7.1 11.0 676 96 68 79.8 4,750 17 13 15.0 893 166 91 143 8,810 17 9.5 13.5 828 Calendar year 1943 206 27 99.7 72,160 17 0 10.2 7,390 160 88 140 8,590 17 7.8 13.1 807 151 126 137 7,870 17 14 16.6 952 166 148 158 9,730 17 .4 12.8 790 151 55 132 7,870 12 4.0 9.25 551 May...... 130 92 114 7,030 12 5.8 9.84 605 86 44 63.9 3,800 13 9.1 11.0 657 68 26 39.3 2,420 11 7.1 8.86 -545 148 38 62.5 3,840 11 7.0 8.74 537 172 36 59.7 3,550 13 6.1 8.83 526 Water year 1943-44 172 26 99.9 72,520 17 .4 11.5 8,370

Time basis; Mountain war time to Dec. 51, 1943; mountain standard Time thereafter. To oonrsrt war time to standard time, subtract 1 hour. GILA RIVER BASIN 313 Gila River near Dome, Ariz. Location.- "Mater-stage recorder, lat. 32°45'40", long. 114°25'10", in SWi sec. 4, T. 8 s., R. 21 W., at highway bridge, 3 miles west of Dome and 12 miles upstream from mouth. Datum of gage is 148.18 feet above mean sea level, datum of 1929. Drainage area.- 58,100 square miles (includes 344 square miles in Autrey Valley Playa, a closed basin, and excludes all other closed basins). Records available.- May 1929 to September 1944. October 1903 to December 1906 at site 4 miles upstream. Records of monthly discharge prior to October 1938, with soro re­ visions and additional monthly estimates January to September 1903, January 1907 to April 1929, republished in Water-Supply Paper 918. Extremes.- No now during year. 1529-44: Maximum discharge, 30,700 second-feet Feb. 15, 1932 (gage height, 16.TO feet); no flow during part or all of each year. Maximum daily discharge, 200,000 second-feet (estimated) Jan. 22, 1916. Remarks.- No flow since August 1941. Diversions above station for irrigation. Flow above station regulated by reservoirs at and above GHlespie Dam (see p. 311 ). Ho flow during calendar year 1943.

Sunset Canal near Virden, N. Mex. Location.- Water-stage recorder and 6-foot concrete Parshall flume, lat. 32°39'20", long. 108°56'00", in NWi sec. 17, T. 19 S., R. 20 W., 4.5 miles southeast of Virden. Records available.- October 1914 to September 1915, July 1922 to September 1931 and Janu- ary 1939 to September 1944 in reports of Geological Survey. January 1936 to Deceriber 1938 in files of Gila Water Commissioner, appointed by the U. S. District Court for Arizona. Extremes.- Maximum discharge during year, 71 second-feet Aug. 12 (gage height, 1.93 feet); no flow at times. 1939-44: Maximum discharge, that of Aug. 12, 1944; maximum gage height, 2.77 feet July 17, 1939, datum then in use; no flow at times. Remarks.- Records good except those for periods of doubtful or no gage-height record, which are fair. Canal diverts from right bank of Gila River in SWiNwi sec. 21, T. 19 S., R. 20 W., for irrigation in Virden Valley. No diversion between intake and station.

Discharge, in second-feet, water year October 1643 to September 1944 l*y Oct. NOV. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 11 15 12 23 0.6 24 43 17 4.7 5.2 13 17 2 20 14 18 11 4.2 28 43 17 6.1 5.4 13 15 21 15 21 11 5.1 32 42 16 6.S 4.7 12 13 4 22 20 20 11 .7 38 41 16 6.S 6.3 S.7 13 25 27 20 10 .6 40 37 16 6.6 7.1 6.3 14

'!6 25 29 20 13 2.2 38 38 16 5.6 23 6.6 23 23 26 20 18 0 32 38 16 6.1 24 7.3 31 8 29 21 20 6.6 3.5 30 31 16 6.3 19 17 25 9 26 21 21 6.6 6.6 29 23 15 6.3 17 20 16 10 23 20 21 6.8 13 34 23 12 6.8 21 51 16 11 27 a!6 IS 6.1 21 36 23 14 S.9 21 56 16 12 28 a SO 17 1.1 33 35 22 16 14 IS 56 15 28 a!7 17 0 36 32 22 14 13 13 43 17 14 27 al5 17 1-1 23 35 9.1 15 a!4 13 40 17 IS 23 al5 17 25 33 35 0 16 a!3 13 15 19 16 27 IS 17 20 41 26 0 16 all 13 36 23 17 30 22 17 15 35 23 0 14 a».7 14 50 29 18 23 23 17 15 30 34 0 12 a8.9 7.0 46 29 19 25 22 JV 14 30 36 0 13 aS.O 26 34 29 20 25 22 16 20 30 37 0 13 S.9 34 14 28 21 24 21 14 27 30 38 0 13 S.9 25 21 2S 22 18 21 10 25 30 42 0 13 10 19 27 19 23 11 20 10 21 30 44 O 12 9.1 29 41 14 24 6.3 17 16 IS 30 44 9.9 13 8.9 35 37 15 25 7.0 13 20 3.2 30 44 17 13 S.9 37 35 14 26 17 12 20 .2 29 44 17, 13 7.S 33 33 14 27 23 e.i 20 .5 25 44 17 13 7.0 33 27 24 28 IS 8.3 23 .6 23 44 17 12 5.S 25 22 27 29 IS 10 25 .6 22 44 17 12 5.4 16 16 25 30 IS 12 32 .6 - 44 17 10 5.S 13 16 26 31 15 - - 40 .6 - 44 - 4.9 - 14 16 Seoond- Runoff in- Month f cot-days Maximum Minimum Mean acre-feat

1 350 544 4 December...... 594 40 10 19.2 1,180 Calendar year 1943 ...... 7,117.6 42 0 19.5 14,120 January 24 April...... May...... 8 30

prr o Septeober...... 612 31 13 20.4 1,210 Water year 1943-44 ...... 7,154;3 56 0 19.5 14,190 a Ho gage-height record; discharge computed on basis of records for station on right side of flume; record furnished by Oila River Water Commissioner. Time basisi Mountain war time. To convert war time to standard time, subtract 1 hour. 670650 O - 45 - 21 314 01 LA RIVER BASIN

Sunset Canal above New Mexico-Arizona State line, near Virden, N. Mex.

Location.- Water-stage recorder and 3-foot concrete Par-shall flume, lat. 32°41', long. IWUS 1 , in NEiSEj sec. 31, T. 18 S., R. 21 W., a quarter of a mile east of New Mexico- Arizona State line and 2.5 miles west of Virden. Records available.- February 1929 to September 1944. Extremes.- Maximum daily discharge during year, 12 second-feet Sept. 27; no flow at times. 1939-44: Maximum discharge, 34 second-feet Oct. 7, 1939 (gage height, 1.85 feet); no flov* at times. Remarks.- Records good except those for periods of no gage-height record, which are poor. Canal dlverte from right bank of Gila River in SWiNWi sec. 21, T. 19 S., R. 20 W., for irrigation in Virden Valley. Many diversions above and below station for Irrigation.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 1.2 1.3 0.3 0 s.o 0.5 0 2.5 0.9 3.6 0 2 .8 2.8 .6 0 8.1 2.1 4.3 1.0 0 .8 0 3 1.5 3.2 4.8 0 2.9 6.9 6.6 0 0 .2 3.4 1.3 4.8 9.1 0 .3 S.5 1.7 0 0 .1 4.4 t> 2.1 2.0 S.I 1.2 0 4.S 9.6 0 0 0 .1 3.0 6 1.0 0 8.5 2.5 0 1.9 8.8 0 0 3.1 0 2.3 3.0 .8 5.7 1.2 0 .1 6.5 0 2.0 6.3 2.3 4.1 8 5.4 1.5 3.8 0 0 1.0 5.1 0 2.8 6.0 5.4 5.8 3.2 1.6 2.3 0 0 6.0 3.2 4.2 1.1 1.3 4.6 4.8 10 .5 2.5 .1 0 0 5.4 2.7 6.0 0 0 1.2 7.3 11 .3 3.1 .3 0 0 6.1 0 2.4 0 .3 5.2 1.5 12 3.6 4.3 2.0 0 .8 1.0 0 0 0 3.1 5.2 1.7 13 11 4.7 3.6 0 3.2 2.0 .8 0 0 6.3 10 0 11 .6 5.7 0 .5 7.0 2.7 0 3.6 5.7 3.0 0 1& 7.5 1.2 8.S .5 .1 7.0 .1 0 5.1 .9 1.4 0 16 8.1 2.1 5.9 3.0 .8 7.8 0 3.1 2.9 0 3.3 0 17 0 1.7 ' 5.1 2.8 .4 8.5 0 6.7 0 0 7.3 4.5 18 2.4 2.1 8.5 4.3 .4 8.6 0 3.9 0 0 8.5 6.7 19 6.0 1.4 3.2 1.9 1.9 5.4 0 .1 0 1.2 10 7.3 20 6.1 1.4 2.3 0 1.2 aO 0 0 4.S 10 3.6 21 6.7 3.3 4.6 0 .1 0 aO 0 1.9 8.0 3.9 2.2 22 3.9 4.1 4.8 2.1 1.3 .1 aO 0 4.4 2.6 0 0 23 2.3 .9 5.5 2.9 2.5 aO 1.6 3.3 .9 1.2 0 24 3.5 .8 6.7 3.3 6.9 aO 4.7 .2 5.7 5.7 2.4 25 3.3 6.5 3.5 6.4 9.0 4.1 3.7 0 6.9 9.2 7.3 a3 26 .5 9.6 .1 8.3 9.6 5.7 .1 0 7.8 11 9.3 27 2.0 6.6 0 7.5 8.3 1.6 .2 0 5.3 7.9 12 28 0 1.2 0 7.3 7.3 0- 0 0 .8 4.4 29 3.5 1.0 .8 0 8.5 5.4 0 0 2.2 V? .5 3.4 30 5.0 .4 2.7 0 3.5 0 .6 3.1 3.^ 0 5.0 31 3.7 - 1.0 0 - .5 2.4 7.2 0 Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 104.4 11 0 3.37 207 December...... 120.6 9.1 .1 3.S9 239 Calendar year 1943 ...... 1,049.6 12 0 2.88 2,080 39.3 6.7 0 1.27 78

9.6 2.36 141 1.69 0 1.20 72 8.0 2.86 176 September...... 106.6 12 0 5.55 211 Water year 1943-44 ...... 1,020.6 12 0 2.79 2,020 a No gage-height record; discharge computed on basis of recorded range in stage, water-master's notes, and records for station near Virden. Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. 01 LA RIVER BASIN 315

Sunset'Canal wasteway near Vlrden, N. Hex.

Location.- water-stage recorder and 3-foot concrete Parshall flume, lat. 32°41 I 4011 , -long. '109°02'55", In NWiSEi sec, 31, T. 18 S., R. 21 W., just below Intake, at New Mexico-Arizona State line and 2f miles west of Virden. Records available.- February 1939 to September 1944. Extremes.- Maximum dally discharge during year, 2.8 second-feet Dec. 13; no flow at 1939-44: Maximum discharge, 27 second-feet my 1, 1941 (gage height, 1.62 feet), from rating curve extended above 15 second-feet by logarithmic plotting; no flow at times. Remarks.- Records fair. Discharge represente waste from Sunset Canal to 01la River by way of Carlyle Canyon. Intake of wasteway Is between State line and station on Sunset Canal above State line.

Discharge, in second-feet, water year October 1945 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 0 0 0 0 0 0 2 0 0 .2 0 0 0 3 0 0 .2 0 0 X 0 4 0 o .6 0 0 o 5 0 0 .2 0 0 0 6 0 0 .4 0 0 * 0 7 0 0 .2 0 0 0 8 0 0 0 0 0 0 9 0 0 .1 0 0 0 10 0 cr 0 o 0 0 11 0 0 0 0 0 0 12 0 .1 1.0 0 0 0 13 0 0 2.8 0 0 0 14 0 0 2.6 0 0 0 15 0 o 1.8 0 0 0 16 0 0 .9 .1 0 0 17 0 0 0 .1 0 0 18 0 0 0 * .3 0 0 19 0 0 0 .1 0 0 20 0 0 0 0 .1 0 21 .1 0 .3 0 .1 0 22 0 0 .7 0 0 0 23 0 0 .7 0 .1 0 24 0 0 .3 0 0 0 25 0 0 0 0 .1 0 26 0 0 0 o .2 0 27 0 0 0 0 0 0 28 0 0 .1 0 0 0 29 0 .2 .2 0 .3 0 30 0 0 .4 0 .1 31 0 - 0 0 - - Second- Runoff in Month foot-days Maximum Minimum Mean acre-fest

October ...... 0.1 0.1 0 0.003 O 2 November...... 3 .2 0 .01 Ie December ...... 13.7 sis 0 .44 27 Calendar year 1943 ...... 21.7 2.S 0 .06 43 January ...... 6 f 0 .02 1.2 February . .9 o 0 .03 1.8 March...... 0 0 0 0 0 April...... 0 0 0 0 0 May...... 0 0 0 0 0 June ...... 0 0 0 0 0 July...... 0 0 0 0 0 August ...... 0 0 0 0 0 September...... 1 .1 0 .003 .2 Water year 1943-44 ...... 15.7 2.8 0 .04 31 Sote.- Ho gage-height record Apr. 26 to May 1, May 3-6, 8, 11-15, July 18-23; discharge computed on basis of recorded range In stage. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. ' 316 GILA RIVER BASIN

Moddle Canal near Vlrden, N, Mex.

Location.- Water-stage recorder and 6-foot concrete Parshall flume, lat. 32°40'30", long. 108°59«30", in NEi sec. 10, T. 19 S., R. 21 W., 1 mile downstream from Intake and 1 mile southeast of Vlrden. Records available.- October 1914 to September 1915, July 1922 to September 1931. and January xyay to September 1944 In reports of Geological. Survey. January 1936 to December 1938 and April 1943 to September 1944 In files In office of Glla Water Commissioner, appointed by u. S. District Court fqr Arizona. Extremes.- Maximum discharge during year, 47 second-feet July 9 (gage height, 1.44 feet); norTow at times. 1939-44: Maximum gage height, 5 feet Sept. 29, 1941, site and datum then In use; no flow at times. Remarks.- Records good. Canal diverts from left bank of Glla River in NWiSBi sec. 11, T. is S., R. 21 W., for Irrigation In Vlrden Valley. No diversion between Intake and station.

Discharge, in aeccnd-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. "Apr. May June July Aug. Sept.

1 10 12 12 5.1 6.4 0 27 0 0 0 0 2 10 12 9.9 0 5.9 0 27 0 0 0 0 3 9.9 12 10 0 10 0 26 0 0 0 0 4 9.6 11 11 0 13 6.1 24 0 0 0 0 5 IS 14 10 0 10 7.9 25 0 4.6 0 0 6 18 17 7.4 0 11 7.9 21 0 17 0 12 7 17 17 7.1 0 13 7.9 19 0 17 0 13 ft 16 IS 7.4 0 11 7.7 17 0 8.2 1.1 7.6 9 12 19 7.7 0 0 9.0 7.4 0 13 13 0 10 10 19 7.9 2.4 10 9.3 7.9 0 23 29 0 11 10 19 7.9 9.0 23 19 12 1.4 24 31 0 12 9.9 20 S.2 6.1 0 IS 17 1.3 19 34 2.3 13 10 20 7.9 5.4 4.7 18 16 2.3 0 33 6.7 14 10 6.1 S.2 3.0 21 17 6.7 1.5 0 27 1.2 15 11 6.4 7.9 .9 19 17 0 .5 0 0 4.9 16 9.9 9.9 S.5 1.0 22 21 0 .5 0 20 12 17 9.9 13 S.5 1.6 IS 23 0 .2 0 2S 19 IB 12 13 8.5 1.2 17 28 0 .1 0 29 24 19 13 14 8.5 1.0 19 27 0 .1 14 24 23 20 16 15 S.5 .5 19 30 0 0 26 21 22 21 IS 16 S.2 6.1 15 33 0 0 12 20 18 m 20 IS 9.0 14 4.6 34 0 0 9.9 19 7.0 Kl 15 14 12 14 0 27 0 0 27 18 0 ?4 11 15 13 15 0 27 0 0 26 17 2.1 25 11 15 16 iS 0 27 0 0 29 17 0 26 10 15 15 10 0 26 0 0 22 18 3.7 R7 11 16 16 5.5 0 27 0 0 24 21 8.2 28 as 16 16 2.1 0 26 0 0 13 12 11 29 11 16 16 3.0 0 24 0 0 0 0 12 .10 11 16 13 6.1 26 0 0 0 0 IS 31 12 ~ 11 5.9 - 28 - - 0 0

Second- Runoff in' Month foot-days Maxinum Mininum Mean acre- feet

October...... 19 *L Deceaber...... *...... 317.2 16 7.1 10.2 629 Calendar year 1943 ...... 3,662.8. 30 0 10.0 7,270 0 4.22 260 272.6 23 0 9.40 541 34 0 IS. 7 1,150 April ...... 253.0 27 0 8.43 502 May...... 0 0 0 0 0 Jufif} 7.9 2.3 0 .26 16 32S.7 29 0 10.6 652 432.1 34 0 13.9 857 September...... 224.7 £4 0 7.49 446 Water year 1943-44 ...... 3,367.5 34 0 9.20 6.680 asla; Mountain war time. To convert war time to standard time, subtract 1 hour. 01 LA RIVER BASIN 317 Moddle Canal at New Mexico-Arizona State line, near Vlrden, N. Mex.

LoQatlon.- water-stage recorder and 4-foot concrete Parshall flume, lat. 32°41', long iw»-UB' f in NEJSEi sec. 6, T. 19 S., R. 21 w., 500 feet upstream-from New Mexico- Arizona State line and 2f miles west of Vlrden. Records available.- February 1939 to September 1944.

Extremes.- Maximum dally discharge during year, 34 second-feet Aug. 13; no flow at times. 1939-44: Maximum dally discharge, that of Aug. 13, 1944; no flow at times. Ttemarks.- Records good except those for periods of backwater, which are poor. Canal^ diverts from left bank of Gila River in NWiSEi sec. 11, T. 19 S., R. 21 W., for Irrigation in Vlrden Valley, mny diversions above and below station.

Discharge, in second-feet, water year October 1943 to September 1944 Da? Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 6.8 9.9 8.2 4.3 6.4 0 IS 0 0 0 2 6.4 S.4 6.6 0 5.3 o 15 0 0 0 3 8.0 7.2 6.4 0 S.6 0 20 0 0 o 4 8.2 7.6 6.8 O 12 0 15 .5 0 0 S e!4 8.6 6.S 0 9.3 1.3 7.0 .6 0 .8 6 c!7 12 5.0 0 9.3 2.3 7.0 13 0 1.4 7 c!6 11 5.0 0 11 '2.0 16 10 0 2.8 8 15 9.5 5.1 0 11 1.6 16 5.7 0 * 5.2 9 11 12 5.3 0 0 2.5 5.5 2.3 5.8 0 10 8.8 16 5.3 .S 2.5 2.8 6.0 16 22 0 11 S.S CIS 5.1 7.6 12 8.0 11 c23 30 0 12 S.6 17 5.1 5.6 O 9.7 017 020 3S .3 13 8.2 13 5.0 4.3 1.6 13 16 .1 34 e.s 14 S.2 3.5 5.3 3.0 17 13 S.7 0 25 0 15 9.3 2.S 5.6 .6 12 11 O O O 4.9 16 9.0 4.6 6.0 .6 14 13 O 0 14 9.1 17 8.2 5.6 6.2 1.3 12 IS 0 0 26 IS 18 9.3 5.0 6.2 1.1 S.2 28 0 0 29 19 19 12 S.S 6.0 .9 11 27 0 3.1 C24 17 20 c!5 9.9 e.s .6 9.5 26 0 9.0 20 IS 21 17 12 5.6 3.2 7.S 28 O 14 SO 16 22 16 10 6.8 12 3.2 30 0 5.3 9.5 8.4 23 12 9.3 11 12 O 26 0 27 5.8 0 24 7.8 8.2 012 12 0 26 0 21 5.8 4.3 25 7.8 8.4 c!3 11 0 26 O 22 7.4 O 26 7.2 8.S 13 B.O 0 26 0 17 12 1.6 27 6.8 9.0 c!3 5.1 0 27 0 25 1? 6.2 28 6.2 9.0 15 1.3 0 24 0 14 6.4 9.3 29 3.2 9.0 9.9 2.8 0 19 0 0 0 10 30 5.6 9.3 7.6 6.4 _ 16 0 r 0 0 13 31 8.8 ~ 6.6 6.2 - 18 - O 0 - Seoond- Runoff in Month foot-days Maxinum Miniaum Mean acre-feet October...... 306.2 17 3*2 9*83 607 November...... 280.4 IS 2.8 9.35 556 December...... 22S.3 13 5.0 7.36 453 Calendar year 1943 ...... 2,680.2 26 0 7.34 5,320 January...... 110.7 12 O 3.57 220 February...... 183.7 17 0 6.33 364 March...... 445.7 30 0 14.4 884 April...... 176.2 20 O 5.94 353 May...... 0 0 0 0 0 June...... 0 0 « 0 0 July...... £48.6 27 0 B.02 493 August...... 347,7 34 0 11.2 690 September...... 171.5 19 0 5.72 340 Water year 1943-44 ...... 2,501.0 34 0 6.83 4,960 e Backwater from vegetation or pumping; discharge computed on basis of records fop station near Vlrden. Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. 318 GILA. RIVER BASIN

Shriver Canal at Tirden, N. Hex.

Location.- Water-stage recorder and 2-foot metal Parshall flume, lat. 32°40'35", long. iOB°b9'50", in SWiSEi sec. 3, T. 19 S., R. 21 W., 1,700 feet downstream from heading and 1 mile south of Vlrden. Records available.- January 1939 to September 1944. Extremes.- Maximum discharge during year, 14 second-feet July 23 (gage height, 1.42 feet); no now at times. 1939-44: Maximum discharge recorded, 29 second-feet Oct. 8, 1939 (gage height, 3.27 feet), from rating curve extended above 6 second-feet by logarithmic plotting; maximum gage height, 3.86 feet Sept. 29, 1941, site and datum then In use (discharge, not determined); no flow at times. Remarks.- Records fair October to March and good thereafter. Canal diverts water from ' ^ of Gila River for irrigation of lands in New Mexico.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 2.7 2.3 0 0.1 3.5 1.2 .0 1.2 0 0.5 2 0 0 2.6 2.9 0 0 0 .8 0 1.4 0 .1 3 0 0 .2.6 3.0 0 0 0 0 0 1.3 0 0 4 0 0 2.S 2.9 0 0 0 0 0 1.6 0 0 5 0 0 2.9 2.9 0 0 0 0 0 .9 0 0 fi 0 .3 2.7 2.8 0 0 0 0 0 0 0 .3 7 0 1.3 2.1 2.9 0 0 .6 0 0 0 0 0 8 0 1.5 0 2.9 0 .9 1.9 0 0 0 0 0 9 0 1.4 0 3.1 0 1.7 0 0 0 0 .6 0 10 0 1.8 0 3.1 0 1.1 0 0 0 0 1.9 0

11 0 1.9 0 2.4 0 ! .9 0 0 .7 .2 1.1 0 IS 0 2.1 0 0 0 0 2.4 0 1.5 1.6 .4 0 13 0 2.2 0 0 0 0 2.5 0 1.9 0 .3 .3 14 0 2.4 0 0 0 0 0 0 2.1 0 .4 .7 15 0 2.4 0 0 .2 .4 0 0 2.2 0 .4 .6 16 0 2.3 0 0 .3 2.1 0 0 1.9 0 1.5 1.4 17 0 2.2 0 0 .8 .5 0 0 1.9 0 1.4 1.0 in 0 2.3 0 0 1.9 .4 0 0 1.7 0 l.S 1.2 19 0 2.4 0 0 2.0 0 0 0 1.6 .5 2.4 1.0 20 0 2.3 0 0 1.9 0 0 0 1.6 1.2 .8 .7 21 0 2.4 0 0 2.2 0 a 0 1.6 .6 1.8 .6 ?.f. 0 2.4 1.0 0 2.1 0 0 0 1.5 0 1.6 .4 23 0 2.3 2.1 0 0 0 0 0 1.5 .4 1.1 0 24 .1 2.2 1.9 0 .8 2.2 i .4 0 1.4 .3 .8 .1 25 .1 2.2 1.6 0 1.6 3.0 1.4 0 1.1 1.8 .9 0 26 0 2.2 2.0 0 0 3.5 1.4 0 1.1 1.4 1.1 0 S7 0 2.2 2.5 0 0 3.7 1.4 0 .6 .9 1.0 1.1 28 0 2.6 2.5 0 0 3.7 1.3 0 .8 .6 .9 1.8 29 0 2.9 2.4 0 0 3.7 1.3 - 0 1.0 .6 .7 1.4 30 0 e.e 1.8 0 _ 4.1 1.2 0 1.0 .5 .9 1.6 31 ~ - 1.5 0 - 4.1 , ~ 0 - .2 .6 ~

Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

December ...... j ...... 37.7 2.9 0 1.22 75 Calendar year 1943 ...... 307.7 4.6 0 .34 612

0 .46 March ...... May* 19.3 3.5 0 .64 38 0 .06 4.0 0 .96 July...... 17.2 1.8 0 .55 34 2.4 September...... 14.7 i.e 0 .49 29 Water year 1943-44 ...... 277.9 4.1 0 .76 551 Hobe.- No gage-height record Sept. 2, 3; discharge computed on basis of recorded range in stage and observer's notes. f Time basis! Mountain war time. To convert war time to standard time, subtract 1 hour. GIU RIVER BASIN 319

Valley Canal near Virden, N. Hex.

Location.- Water-stage recorder and 4-foot concrete Parshall flume, lat. 32041'35", 1'brig.""109002'20", in SWiSWi sec. 32, T. 18 S., R. 21 W., li miles downstream from intake and 2i'miles west of Virden. Records available.- October 1914 to September 1915, July 1923 to September 1931, and May ±y»y -co septemoer 1944 in reports of Geological Survey. January 1936 to December 1938 (at site half a mile downstream and below wasteways) In files of Gila Water Commissioner, appointed by the U. S. District Court for Arizona. Extremes.- Maximum gage height during year, 2.87 feet Sept. 15 (discharge not determined); no flow at times. 1939-44: Maximum gage-height, 2.87 feet Aug. 5, 1939, Sept. 15, 1944 (discharge not determined); no flow at times. Remarks.- Records fair. Canal diverts from right bank of Gila River in NEiNWi sec. 4, T. 19 S., R. 21 W., New Mexico, for irrigation in Duncan Valley in-Arizona. There are two wasteways between this gaging station and point of use. For annual net diversion see p. 291.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. Bay June July Aug. Sept.

1 , 5.9 0 17 0 16 17 «l 16 9.2 0.3 1.9 6.7 2 18 8.5 16 0 16 16 21 15 7.5 .7 .9 8.4 3 16 15 17 0 15 16 17 14 6.2 0 .6 6.S 4 14 14 18 0 15 14 13 11 4.0 0 .5 4.7 5 12 18 19 0 15 12 13 11 3.8 1.1 .3 6.4 6 11 12 19 0 16 12 13 10 0 .7 .3 26 7 9.9 12 IS 0 16 14 9.9 9.4 0 3.5 0 17 R 9.8 5.6 18 6.0 16 14 18 5.4 0 4.1 .3 13 9 10 .1 18 13 17 14 19 5.2 0 4.5 6.3 14 10 12 6.3 18 13 14 13 23 3.1 0 2.9 14 11 11 11 15 18 11 9.2 11 28 0 .7 8.3 17 9.2 12 11 15 18 13 14 23 19 .3 0 4.9 a.3 6.2 13 11 15 IS 13 12 17 14 .4 0 0 aO 4.2 14 9.9 17 18 6.2 9.1 1214 ' 5.2 0 0 2.1 0 2.4 15 11 18 ' 18 6.0 8.6 0 0 0 3.6 2.7 8.7 Ifi 9.6 IS 19 15 6.0 22 0 0 0 3.8 14 3.6 17 8.6 18 21 16 8.6 24 0 0 0 6.1 IS .6 IB 8.3 17 SO 16 11 24 0 0 0 6.1 21 .2 19 7.8 17 18 - 16 <9.8 81 0 0 0 11 25 .5 20 7.7 17 18 15 10 24 0 6.0 0 16 15 0 21 12 17 18 n 12 28 0 12 0 20 8f 4 0 22 13 17 18 9.4 13 18 0 13 0 IS 8.1 .2 23 13 16 17 12 14 .4 0 11 0 19 17 0 24 15 15 17 13 15 3.6 10 9.4 0 1.6 22 .1 25 15 16 15 17 17 14 19 7.3 0 12 18 0 26 5.6 17 16 18 16 IS 18 6.4 0 16 15 4.9 27 0 IS 16 19 16 19 17 5.6 0 6.6. 14 20 28 .0 17 16 19 16 30 16 7.2 .6 11 13 20 29 7.7 17 16 19 16 31 15 6.6 0 16 13 80 30 14 18 8.2 18 _ 22 14 7.6 0 9.8 9.8 80 31 6.7 - 0 16 - 21 - 9.9 - 4.5 6.1 - Seccnd- Runoff in Month fcpt-days Maximum Minimum Mean acre-feet

JO

December ...... 521.2 21 0 16.8 1,030 Calendar year 1943 ...... 3,434.6 24 - 0 9.41 6,610 January 389.3 17 6.0 13.4 772 17.0 April...... 336.1 88 11.2 667 Bay...... 0 6.48 39S 20 6.72 413 AXL£U8t 9.00 Septeaber...... 834.8 26 0 7.83 466 Hater year 1943-44 ...... 3,795.8 31 0' 10.4 7,530 a Ho gage-height record; discharge estimated. Time basis8 Mountain war time. To convert war time to standard time, subtract 1 hour. 320 C A. RIVER BASIN

San Francisco River near Glenwood, N. Mex.

Location.- Water-stage recorder, lat. 33°15'05", long. 108°58'40", in NEiHWi sec. 23, T. 12 S., R. 20 W., a quarter of a mile upstream from hot springs and 6 miles south of Glenwood. Datum of gage Is 4,552.06 feet above mean sea level, datum of 1929. Drainage area.- 1,660 square miles. Records available.- October 1930 to February 1934 (at site 44 miles upstream) and Febru- ary 1934 to September 1944 in reports of Geological Survey. October 1927 to December 1931 (at site 4^ miles upstream) In reports of State engineer. Average discharge.- 15 years (1928-31, 1932-44), 69.1 second-feet. Extremes.- ffeximum discharge during year, 2,700 second-feet Sept. 27 (gage height, 5.32 feet); minimum daily, 9.3 second-feet June 28, 1930-44: Maximum discharge, 6,000 second-feet July 25, 1940 (gage height, 7.32 feet), from rating curve extended above 1,300 second-feet by logarithmic plotting; minimum daily, 7.7 second-feet June 21, 1934. Remarks.- Records good except those for periods of no gage-height record, which are poor. Diversion above station for irrigation.

Discharge, in,second-feet, water year October 1945 to September 1944 Daj Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 a35 43 30 30 28 30 30 24 16 se 9.S 23 Z aSO 40 30 30 29 SO SO 18 IS 52 11 22 3 aSO 36 27 29 29 32 25 18 18 40 13 22 4 30 32 25 30 28 31 20 17 23 41 11 22 5 SO 33 27 30 27 30 21 16 21 42 11 24 6 31 34 2S 30 28 30 21 14 23 49 21 23 7 30 S3 31 29 29 2S 24 19 19 52 15 22 8 SO 33 32 28 28 2S 25 20 19 47 197 22 9 30 32 36 27 27 29 25 22 21 44 219 23 10 30 33 35 25 25 29 22 26 22 SI 128 23 11 30 33 35 87 27 29 23 21 21 aSO 40 23 12 31 33 34 30 24 27 23 22 23 20 30 27 13 30 33 34 30 25 28 37 23 23 17 27 25 14 29 a33 34 2S 27 36 26 23 19 17 27 24 15 29 33 33 29 26 47 26 23 21 17 30 S5 16 27 33 32 30 28 46 26 19 22 24 95 61 17 25 34 31 30 29 3S 23 22 19 19 46 33 18 27 34 31 30 28 38 23 21 17 20 58 29 19 195 34 32 29 28 46 20 20 17 a30 36 27 20 a!40 34 31 20 29 44 20 15 17 a20 82 25 21 80 34 31 2S 30 39 20 18 17 a25 49 25 22 a50 32 31 28 30 38 21 16 17 a22 34 24 23 36 32 31 29 30 , 36 20 17 16 a 40 30 24 24 36 31 30 30 30 33 19 12 17 a50 103 211 25 36 31 30 33 S3 28 23 11 16 a30 88 120 26 35 ' 31 30 35 33 30 19 17 14 a25 46 59 27 34 30 32 32 33 37 21 18 11 a20 36 598 28 34 31 31 30 32 36 SI 19 9.3 17 32 237 29 55 31 30 28 30 35 17 19 IS 16 29 72 30 54 30 30 29 _ 34 22 16 IS 14 25 34 31 43 - 30 29 - 30 19 - 9.8 24 - Seccnd- Runoff in Month fcot-days Maximum Misimun Mean acre-feet

1 QBE November 996 December ...... 964 36 25 31.1 1,910 Calendar year 1943 ...... 12,195 278 12 33.4 24,200

March ...... OO"X

September...... 1,989 598 22 66.3 5,950 Water year 1943-44 ...... 12,504.9 598 9.3 34.2 24,820 a No gage-height record; discharge computed on basis of weather records and records for Clifton, Ariz. Time basis: Mountain war time. To convert war time to standard time, subtract 1 hour. GIJA RIVER BASIN 3S1 San Francisco River at Clifton, Arlz.

Location.- Water-stage recorder, lat. 33°03'00", long. 109°17'45", In SWjSEi sec. 30, T. 4 S., R. 30 E., at Railroad Boulevard Bridge at Clifton, 84 miles above mouth. Datum of gage is 3,431.67 feet above mean sea level, datum of 1929. Drainage area.- 2,790 square miles. Records available.- July 1927 to October 1933, Nay 1935 to September 1944. October 1910 to July 1918 Ifragmentary) at several sites, none of which was more than 2 miles upstream. Average discharge.- 15 years (1927-33, 1935-44), 175 second-feet. Extremes.- Maximum discharge during year, 3,800 second-feet Sept. 26 (gage height, 9.15 feet); minimum, 14 second-feet June 29 (gage height, 2.17 feet). 1927-44: Maximum discharge, 12,400 second-feet Feb. 8, 1937 (gage height, 12.7 feet); minimum, 8 second-feet June 18, 19, 1939. Correction.- The statement "probably no flow In 1934" published- In previous water- supply papers was found to be in error. Remarks.- Records excellent except tjhose for days of fragmentary gage heights, which are fair. Records of water analyses for the water year 1944 are given in Water-Supply Paper 1022.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Har. Apr. May June July Aug. Sept.

1 66 71 56 65 60 64 70 62 30 29 25 f42 2 69 70 56 64 59 61 70 58 31 95 22 f41 3 53 68 56 62 59 65 70 54 30 59 20 f39 4 52 65 56 62 59 68 69 60 30 48 21 f38 5 51 64 51 62 58 66 62 52 33 56 21 f38 6 51 61 54 64 57 65 62 48 33 52 25 ei 7 50 61 53 64 58 64 64 46 29 48 37 50 8 49 60 57 62 56 62 66 46 27 80 82 43 9 48 60 68 62 58 60 69 48 25 96 222 41 10 49 60 84 60 58 59 73 53 25 48 323 36 11 49 60 70 59 57 59 70 61 26 42- 120 39 12 48 60 66 60 5S 59 64 67 27 f38 112 36 13 47 60 66 61 56 60 68 54 26 f36 60 40 14 47 59 64 62 57 61 69 57 28 fS3 45 41 15 46 57 61 64 59 Ti 66 61 26 rsi 40 40 16 45 57 60 64 60 6» 64 48 25 f29 206 170 17 44 57 60 65 61 85 61 44 25 29 168 78 IS 44 56 58 65 61 67 60 46 24 107 180 58 19 105 56 59 66 60 91 60 46 22 64 f81 61 20 228 56 59 64 60 91 58 44 21 f54 87 46 21 110 54 59 64 60 87 57 39 21 ' f76 154 41 22 88 63 60 62 60 84 66 38 21 f56 f78 40 23 77 53 ' 61 61 60 78 56 38 21 110 f67 54 24 70 54 61 62 61 75 54 36 20 144 384 172 25 68 54 61 77 67 74 52 34 19 68 130 296 26 66 54 64 75 80 66 52 30, 18 48 116 1,160 27 65 54 69 73 74 70 61 34 ie 43 87 969 28 62 54 66 68 71 78 SI 36 16 37 70 f646 29 64 54 66 65 66 78 63 35 16 36 67 436 30 84 56 66 61 _ 74 51 36 25 32 f50 160 31 84 65 60 - - 73 - 32 - 29 f46 -

Second- Runoff in Month foot-days Maximum Minimum Mean ao re- feet

October...... '...... 2 063 228 44 66.7 4,100 November...... 1,758 71 53 S8.6 3,490 December ...... 1,914 84 51 61.7 3,800 Calendar year 1943 ...... 26,748 1,100 15 78.8 57,030 January 1,985 77 69 64.0 3,940 February...... 1 V94 6V 56 61.9 5,560 Maroh...... s',220 91 59 71.6 4,400 April...... 1,848 73 51 61.6 3,670 May...... 1.403 61 30 45.3 8,780 June ...... 736 33 15 24.5 1,460 July...... 1,752 144 29 56.5 3,480 August 3,118 384 20 101 6,180 September...... 5,044 1,160 36 168 10,000 Water year 1943-44 ...... 26,640 1,160 15 70.1 50,860 f Fragmentary gage-height recordj discharg » computed from partly estimated gage heights. Time baais; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 322 GILA RIVER BASIN

San Simon Creek near Solomonsvllle, Arlz.

Location.- Water-stage recorder, la£. 32°48'06", long. 109036'19", In NWiNEi sec. 25, T. 7 S., R. 26 E., 1 mile southwest of Solomonsvllle and 24 miles upstream from mouth. Datum of gage Is 2,960.15 feet above mean sea level, datum of 1929. Drainage area.- 2,280 square miles. Records available.- June 1931 to September 1932, May 1935 to September 1944. Extremes.- Maximum discharge during year, 5,900 second-feet Sept. 25 (gage height, 10.88 feet); no flow on many days. 1931-44: Maximum discharge, 27,500 second-feet Aug. 9, 1931 (gage height, 19.0 feet), by slope-area method; no flow on many days In each year. Remarks.- Records good except those for periods of fragmentary gage-height record, which are fair, and those for July 18, 19, which are poor. Small diversions above station for Irrigation. Records do not Include waste water passing station from San Jose Canal, which diverts from Glla River.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4 0 0 0 - o 5 0 6 0 232

6 0 0 0 . u

January...... 0 0 0 0 0 February...... 0 0 0 0 0 March...... 4 .3 0 .01 .8 April...... 0 0 0 0 0 May...... 0 0 0 0 0 June ...... 0 0 0 0 0 July...... 334 249 0 26.9 1,650 August ...... 4,906 1,480 0 158 9,730 September...... 2,688 1,360 0 89.6 5,330 Water year 1943-44 ...... 8,428.4 1,480 0 23.0 16,710 Peak discharge.- Aug. 16 (3 a.m.) 5,740 aec.-ft.; Aug. 17 (1 a.m.) 4,550 see.-ft.; Aug. 18 (2 a.m.) 5,400 see.-ft.; Aug. 19 (10 p.m.) 2,930 sec.-ft.; Sept. 25 (12:10 a.m.) 5,900 see;-ft. f Fragmentary gage-height record; discharge computed on basis of partly estimated gage heights. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 323

San Carlos River near Peridot, Ariz.

Location.- Water-stage recorder, lat. 33°19'20", long. 110°26'50", in NWi sec. 30, T7~T~S., R. 19 E., unsurveyed, on San Carlos Indian Reservation, at highway bridge, 2 miles downstream from San Carlos and 2 miles upstream from Peridot. Datum of gage is 2,582.71 feet above'mean sea level, datum of 1929. Drainage area.- 1,040 square miles. Records available.- March 1929 to September 1944. August 1910 to January 1911 and April 1914 to September 1915 (fragmentary) at site 9i miles downstream. Average discharge.- 15 years (1929-44), 60.3 second-feet. Extreme.s.- Maximum discharge during year, 795 second-feet Sept. 27 (gage height, 3.88 reet), from rating curve extended above 200 second-feet by logarithmic plotting; no flow parts of several days in August. 1929-44: Maximum discharge, 40,600 second-feet Mar. 14, 1941 (gage height, 11.4 feet, site and datum then in use), from rating curve extended above 23,000 second-feet on basis of records of inflow to San Carlos Reservoir; no flow on several days in most years. Remarks.- Records good except those above 200 eecond-feet, which are fair, Small diver- sibhs above station for irrigation.

.Discharge, in second-feet, water year October 1943 to September 1944 Day Oct.- MOV. Dec. Jan. Feb. Mar. Apr. May June July AUg. Sept.

1 11 15 12 14 17 178 11 9.5 4.8 0.5 8.1 4.0 2 9 13 11 13 17 146 11 8.9 4.8 .7 .9 4.3 3 9 11 11 13 17 157 11 7.8 4.5 1.8 .7 3.8 4 10 11 10 14 18 174 11 7.6 4.8 1.0 .7 3.3 5 9 11 11 15 18 105 11 7.4 4.3 .9 .5 3.3 6 8 9 11 16 ie 91 11 6.9 4.3 .7 .4 3.1 7 ee 11 12 17 18 67 11 6.9 3.3 .4 .5 8.8 8 ee 11 13 1817~ 17 48 11 7.4 3.5 4.7 1.9 2.8 9 e8 11 13 17 44 16 7.4 2.8 87.0 58 8.8 10 e 11 15 15 17 37 81 16 8.8 8.4 61 8.8 11 e 13 14 15 16 31 17 15 2.8 4.0 84 5.1 12 9 14 16 16 14 31 16 12 8.8 2.6 11 6.1 13 10 14 16 18 14 34 16 11 2.8 1.9 6.4. 5.4 14 10 13 16 18 13 31 14 10 8.6 1.5 4.8 4.3 15 10 15 16 18 11 36 14 8.ST 2.5 1.2 4.5 26 16 5 15 13 17 11 30 13 8.9 8.1 .7 3.8 70 17 5 13 13 17 13 38 12 8.9 2.1 .8 3.3 12 18 7 12 13 16 13 32 12 8.4 8.3 1.0 44 7.4 19 817 11 13 16 14 31 11 8.4 2.1 1.1 78 6.5 20 62 11 13 16 15 35 10 8.4 1.8 1.4 10 5.8 21 27 18 13 16 16 34 9.5 7.4 1.6 1.4 6.9 5.4 22 21 13 14 16 19 32 9.5 6.9 1.2 8.0 5.8 5.1 23 ie l'313 14 16 18 88 9.5 6.5 1.4 19.0 4.8 5.1 24 13 14 17 80 24 9.5 6.1 1.5 18.0 8.9 7.8 25 13 13 13 20 86 82 8.9 5.8 1.5 6.5 8.4 63 26 16 as 16 18 43 19 8.9 6.1 1.5 4.0 6.1 44 27 16 14 23 16 96 18 9.5 5.8 1.4 3.3 4.8 406 28 15 15 20 16 122 16 10 5.4 1.0 3.3 4.8 801 29 16 13 16 16 199 14 10 4.8 .8 8.5 4.8 133 30 13 13 16 _ 14 8.9 4.8 .5 2.3 4.3 44 31 16 - 14 16 - 12 4.8 - 2.5 4.3 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 618 " 217 5 19.9 1,830 November...... 377 15 9 IS* 6 V48 December...... 432 83 10 13 9 85V Calendar year 1943 ...... 14,441 1,700 1 39.6 28,650 January...... 508 80 13 16* 3 996 February...... '..... 837 169 11 88.9 1,660 March...... 1,603 176 18 51.7 3,180 April...... 354.2 21 8.9 11.8 703 May...... 850.3 16 4.8 8.07 496 June...... 76.9 4.6 .5 2.56 153 July 120.5 87 .4 3.89 239 August 368.1 72 .4 11.9 730 Saptenber...... 1,098.0 408 2.8 36.6 2,180 Water year 1943-44 ...... 6,637.0 408 .4 18.1 13,170 e Gage height not representative of total flow; discharge Interpolated. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. war time to standard time, subtract 1 hour. 324 Q11A RIVSR BASIN

San Pedro River at Charleston, Aria.

Location.- water-stage recorder, lat. 31°37'40", long. 110010'30", in NEiNEi sec. 11, T. m s., R. 21 E., in Spanish land grant of San Juan de las Boquillas y Nogales, at highway bridge, a quarter of a mile south of Charleston, li miles upstream from ~ Charleston dam site, and 8| miles upstream from Babocomarl River. Datum of gage is 3,954.26 feet above mean sea level, datum of 1929. Drainage area.- 1,220 square miles, of which 696 square miles is in Mexico. Records available.- my 1928 to December 1933 and May 1935 to September 1944. 1904 to iwue ana isiu to 1928 at several sites upstream or downstream. Average discharge.- 27 years (1915-33, 1935-44), 68.7 second-feet. Extremes.- Maximum discharge during year, 3,430 second-feet Aug. 18 (gage height, 6,87 reet j; minimum, 2 second-feet June 28. 1928-44: Maximum discharge, 31,000 second-feet Aug. 13, 1940 (gage height, 13.1 feet, site and datum then in use), from rating curve extended above 8,500 second-feet on basis of slope-area determination at gage height 21.9 feet; minimum, 1 second-foot June 27, 1939. Maximum discharge known, about 98,000 second-feet Sept. 28, 1926 (gage height, 21.9 feet, site and datum then in use, from floodmarks), by slope-area measurement. Remarks.- Records good except those for periods of fragmentary gage-height record, which are ralr. Diversions above station for irrigation..

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 25 15 14 16 13 21 14 12 5 3 12 11 2 22 15 14 17 13 21 14 12 6 3 11 10 3 20 15 13 17 12 21 14 11 6 3 9 10 4 17 15 13 17 11 22 13 11 6 17 S 49 5 17 13 14 16 11 22 13 11 6 5 20 93 fi 14 13 14 16 13 21 13 11 6 6 16 287 7 14 13 14 16 15 21 12 10 5 19 13 75 8 13 13 15 15 " 14 21 12 10 5 609 408 32 9 16 13 21 15 13 22 14 10 5 249 221 25 10 SI 13 19 16 12 23 15 10 5 f55 15S 21 11 60 13 19 17 12 22 15 11 5 f2S 44 54 12 34 13 19 17 12 21 15 10 5 f!9 42 18 13 27 14 19 16 12 21 13 10 5 17 294 17 14 25 15 IS . 15 14 22 13 9 4 10 73 17 15 24 15 17 IS 15 22 13 9 4 12 101 80 16 21 15 17 15 15 23 12 9 4 11 1,240 381 17 20 15 17 16 17 28 12 9 4 6 177 101 IB 17 14 .17 17 16 34 12 9 4 6 692 40 1» 19 13 16 17 16 43 12 9 4 7 43 25 20 22 13 16 17 17 29 12 9 4 225 60 22 ?1 20 13 16 17 19 24 11 9 4 174 29 19 22 18 13 16 16 20 2S 12 9 5 551 28 15 as 16 14 16 19 21 23 12 9 4 340 IS 13 ?4 16 14 16 21 22 22 12 8 4 194 16 19 25 15 14 16 24 22 22 11 8 4 52 15 46 2fi 15 14 17 24 24 IS 11 S 3 30 17 26 27 13 14 17 22 S3 17 11 7 5 22 15 21 2R 13 14 17 19 22 15 12 7 5 17 13 33 !S> 13 14 17 17 22 16 12 7 3. 25 12 26 ?K> 13 14 16 15 _ 17 11 6 3 15 11 17 31 15 ~ 16 15 - 17 - 6 - 12 11 - Second- Runoff in Month fcot-days Maximum Minimal Mean acre- feet October...... 21 S November December...... 506 21 13 16.3 1,000 Calendar year 1943 ...... 24,501 2,910 4 67.1 48,600

February QOO March...... 43 5 9.2 6

September...... "...... 1,603 3S1 10 53.4 3,180 Water year 1943-44 ...... 12,251 1,240 3 33.5 24,300 Peak discharge.- July 22 (12 D.B.} 2 P 76O see. -ft.; AUR. 16 (7 a.m.) 2 rfiOO see. -ft. ; Au«. IS (3 a.m.) 3,430 aeo.-ft". t Fragmentary gage-height record; discharge computed from partly estimated gage heights. Time hasla i Mountain war time to Dee. 31, 1943; mountain standard time thereafter. To convert war tine to standard time, subtract 1 hour. QI1A RIVER BASIN 325 San Pedro River near Redington, Ariz.

Location.- Water-stage recorder, lat. 32°23', long. 110°27', In NWi sec. 19, T. 12 S., it. is E., half a mile upstream from Cochise-Pima county line, 4 miles upstream from Redington, and 30 miles downstream from Benson. Datum of gage is 2,937.53 feet above mean sea level, datum of 1929. Drainage area.- 2,940 square miles of which 696 square miles is in Mexico. Records available.- June 1943 to September 1944. Extremes.- Maximum discharge during year, 19,000 second-feet Sept. 24 (gage height, 11.05 ?eet), from rating curve extended above 7,000 second-feet by logarithmic plotting to peak discharge of 90,000 second-feet at gage height 21.5 feet (see below); no flow on many days May to September. 1943-44: Maximum discharge, that of Sept. 24, 1944; no flow on many days of each year. Maximum discharge known, 90,000 second-feet Sept. 28, 1926 (gage height, 21.5 feet from floodmark) computed on basis of peak discharge of same flood for stations at Charleston and Gila River at Kelvin. Remarks^- Records good except those for periods 'of fragmentary or no gage-height record 1 ana tnose below 2 second-feet, which are fair. Diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. HOT. Dec. Jan. Feb. liar. . Apr. May June July Aug. Sept. 1 f9 al 1 1 0.7 0.9 1 o.s o 0.2 0.1 2 fS al 1 1 .7 1 1 .6 .1 0 o 3 t.S al 1 1 .7 1 1 .6 .3 0 0 4 r.5 al 1 1 .7 1 1 .a .1 0 0 S t.S 1 1 1 .8 1 1 .7 .7 0 201 6 f.6 .9 1 1 .6 1 1 .6 0 0 f240 7 a.6 .9 1 1 .8 1 1 .6 0 0 rieo S a.6 .9 1 . b.9 .S 1 1 .6 0 374 f66 9 a.6 .8 2 b.9 .8 1 2 .7 376 2,240 al8 10 a.6 .8 1 b.9 .S 1 1 .e »40 425 a4 11 a2 .9 1 b.S .S 1 1 .4 aS 125 a2 12 B.5 .8 1 b.9 .7 1 1 .3 al 44 f89 13 a2 .8 2 b.S .7 1 1 .3 . al 33 a9 14 al .8 1 b.S .8 1 1 .a aO 200 a£ 15 al .8 1 b.9 .7 1 1 .2 aO 71. 1 16 al .9 1 b.9 .8 1 .9 .2 aO 960 . 87 17 al .9 1 .8 .7 1 1 .3 aO f684 832 IB al 1 1 .8 .7 2 .9 .1 aO f738 81 19 al 1 1 .9 .7 1 1 .1 aO 312 18 20 al .9 1 .8 .7 S .9 .1 aO 96 rs 21 al t .9 1 .8 .6 9 .e .1 33 66 ri 22 al .9 1 .e .6 B.5 .e .1 305 30 .6 23 al .9 1 .8 .6 aS i .1 847 12 7 24 al 1 1 1 .9 a2 .s 0 f410 20 1,870 25 al 1 1 .9 .8 a2 .8 0 118 a7 fl72 26 al 1 1 .9 .S 2 .9 0 f26 a2 alO 27 al 1 1 > .8 .8 2 .7 0 f3 al a6 28 al 1 1 .8 .9 1 .9 0 1 a.6 aS 29 al 1 1 .8 .8 2 .e 0 .5 a.5 a2 30 al 1 1 .8 - 2 .9 0 .2 .2 a2 31 al ~ 1 .7 ~ 2 ~ 0 .1 .2 -

Seoond- Runoff in' Month f cot-days Maximum Miniauo Mean acre-feet

October...... 42 3 9 0.5 1>36 84 November...... J37.3 1 .8 .93 66 December...... 33.0 .2 1 1.06 65 Calendar year 1943 ...... _ . _ _ January...... 27.3 1 .7 .88 54 February...... 21.17 .9 .6 .76 43 Harch S9.9 9 .9 1.93 119 April...... 29.1 2 .7 .97 63 IjnTr ay...... 9.0 .e 0 .29 IS June...... 0 0 0 0 0 July...... 1,868.0 547 0 60.3 3.710 August ...... 6,333.6 2,840 0 804 12,660 September...... 3,226.6 1,870 0 103 6,400 Water year 1943-44 ...... 11,677.3 2,240 0 ai.fr 23,170 P«ak discharge.- Aug. 9 (4 p.m.) 9,240 sec.-ft.; Aug. 16 (6 p.m.) 2,700 see.-ft.; Aug. IS (3 p.a 3,090 see.-ft.; Sept. 24-(4:30 p.m.) 19,000 see.-ft. a Ho gage-height record; discharge computed on basis of weather records, known upper limit of discharge, shape of recession curve as determined from previous rises, and by comparison with records for station at Charleston. b Stage-discharge relation affected by ice. f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Tlae basis; Mountain war time to Bee. 31, 1943; mountain standard time thereafter. To convert war time to standard time, sxibtract 1 hour. 336 GILA RIVER BASIN Santa Cruz River near Nogales, Arlz. Location.- Water-stage recorder, lat. 31°21', long. 110°51% In NW* sec. 18, T. 24 S., R~. 1S"E., unaurveyed, in Spanish land grant of Buena Vista, three-quarters of a mile downstream from International boundary and 5i miles east of Nogales. Drainage area.- 542 square miles of which 357 square miles Is In Mexico. Records available.- my 1930 to December 1933, July 1935 to September 1944. March to November 1907, April 1909 to June 1920 (fragmentary), at site 5i miles downstream. April 1921 to June 1922 at site 6 miles downstream. Average discharge.- 12 years (1930-33, 1935-44), 19.8 second-feet. Extremes.- Maximum discharge during year, 4,700 second-feet Aug. 15 (gage height, 9.15 feet); no flow

Seoond- Runoff in Month foot-daya Maximum Minimum Mean ao re-feet 26.3 7 0.4 0.91 56 51.2 .8 1.71 102 December...... 83 5 2 2.7 166 Calendar year 1945 ...... 4,688.2 376 0 13.2 9,590 2.9 179 222 March ...... 6.1 375 April...... Bay...... 24

August .... September...... 46.5 ' 34 0 1.55 92 Water year 1943-44 ...... 1,675.9 373 * 0 4.57 3,320 Peak discharge.- July 22 (5 p.m.) 615 sec.-ft.j Aug. 15 (4:30 p.m.) 4,700 sec.-ft.; Aug. 16 (5:30 p.m.) 412 sec.-ft.; Aug. 19 (11 a.m.) 131 sec.-ft. a No gage-beight record; discharge computed on toasls of recorded range in stage, weather records, and comparison with record for Sonolta Creek near Patagonia. Time Tiaais; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour.

Santa Cruz River at Continental,- Arlz. Location.- Water-stage recorder, lat. 31°51', long. 110°59', In NEfc sec. 23, T. 18 S., R. 13 E., in Spanish land grant of San Ignaclo de la Carioa, at highway bridge at Conti­ nental. Datum of gage Is 2,836.39 feet above mean sea level, datum of 1929. Drainage area.- 1,640 square miles, or which 403 square miles Is In Mexico. Records available.- May 1940 to September 1944. Extremes.- Maximum discharge during year, 4,440 second-feet Aug. 12 (gage height, 5.80 feet); no flow during most of year. 1940-44: Maximum discharge, 12,100 second-feet Aug. 14, 1940 (gage height, 8.85 feet), by float-area method; no flow during greater part of each year. Remarks.- Records good. Many snail diversions above station for Irrigation. GIIA RWIR BASIH 327 Discharge, in second-feet, of Santa Cruz River at Continental, Ariz. water year October 1943 to September,1944 Day July Aug. Sept. Day July Aug. Sept. Day July Aug. Sept. 1 0 0 0 11 0 0 26 21 0 0 0 2 0 0 0 18 0 401 0 2S 0 0 0 5 0 0 16 13 0 72 0 83 0 0 0 4 0 0 8 14 0 0 0 24 4 0 0 . 5 0 0 0 15 0 296 50 25 0 0 0 6 0 0 0 16 0 588 25 26 0 0 0 7 0 14 0 17 0 65 0 E7 0 0 4 8 0 367 0 18 0 8 0 88 0 0 0 9 0 162 0 19 0 0 0 29 0 0 0 10 0 25 9 20 0 0 0 30 0 0 0 51 0 0 Second- Runoff in Month foot-days MajcinwE Minimum Mean acre-feet Octob 0 0 0 0 0 N overt 0 0 0 0 0 Deceml 0 0 0 0 0 Cal indar year 1943. 5,115 861 0 14.0 10,140 Januai 0 0 0 0 0 Febrm 0 0 0 0 0 March 0 0 0 0 0 April 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 July. r --. ------4 4 0 .1 7.9 Augus 1,954 588 0 62.4 5,840 Septei 116 50 0 5.9 250 Hat sr year 1943-44. . 2,054 528 0 5.6 4,080 Peak discharge.- Aug. 8 (5 a.m.) 5,860 sec. -ft. ; Aug. 12 (8:20 p.m.) 4,440 sec.-ft.; Aug. 16 (11:50 a.m.) 5,200 sec.-ft.

Santa Cruz River at Tucson, Arlz. Location.- Water-stage recorder, lat. 32°13', long. 110°59', In NEi sec. 14, T. 14 S., R. 13 E., at Congress Street Bridge In TUCSOIK Datum of gage Is 2,327.16 feet above mean sea level, datum of 1929. Drainage area.- 2,190 square miles, of which 403 square miles Is In Mexico. Records available.- October 1905 to September 1944. Average dlseharjeT- 32 years (1912-44), 21.5 second-feet. Extremes.- Maximum discharge during year, 6,530 second-feet Aug. 16 (gage height, 10.40 feet); no flow during greater part of year. . 1905-44: Maximum discharge, about 15,000 second-feet Dec. 63, 1914, from rating curve extended above 9,000 second-feet; no flow during greater part of each year. Remarks.- Records good above 50 second-feet and fair below. Hany diversions above station for Irrigation. Discharge, In second-feet, water year October 1945 to September 1944 Day July Aug. Sept. Day July Aug. Sept. Day July Aug. Sept. 1 0 0 0 11 0 1 3 21 0 0 0 2 0 0 0 12 0 3 6 22 52 0 0 3 0 0 0 13 0 887 0 25 25 0 IS 4 0 0 8 14 0 0 0 24 4 0 9 5 0 0 5 15 0 14 255 25 0 0 12 6 0 0 .0 16 0 2,740 688 26 0 0 0 7 0 16 0 17 0 56 1 27 0 0 0 8 0 218 0 IS 0 5 0 88 0 0 0 9 0 444 0 19 0 8 0 29 0 0 0 10 0 56 0 20 0 1 0 50 0 0 0 51 0 0 Second- Runoff In Month foot-days Maximum Minimum Mean acre-feet Octob 0 0 0 0 0 Woven 0 0 0 0 0 Decem 0 0 0 0 0 Cal endar year 1943. 5,580 1,120 0 15.5 11,070 Janua 0 0 0 0 0 Februi 0 0 0 0 0 March 0 0 0 0 0 April 0 0 0 0 0 Ua 0 n 0 0 0 0 0 0 0 0 July. ------61 32 0 2.0 121 Augus 3,349 2,740 0 124 7,630 Septe 1,003 688 0 55.fi 2,000 Wat ar year. 1943-44. 4,918 2,740 0 15.4 9,750 Peak dis charge. - 4ug. 8 (9:30 a.m.) 2,100 Sep. -ft.; Aug. 9 (6:30 p.m.) 1,660 ' sec. -ft. j Aug. 13 < 1 a.m.) 2,450 sec. -ft. 5 Aug. 16 (8:50 a.m.) 6,530 sec. -ft. 5 Sept. 15 (10:30 p.m ) 3,070 sec. -ft.; Sept. 16 (1 a.m.) 2,940 sec. -ft.

Time basis; Mountain war time to Dec. 31, 1943; mountain standard time there- To convert war time to standard time, subtract 1 hour. 328 OILA RIVER BASIN

Santa Cruz River at Rill1to, Ariz.

Location.- Water-stage recorder, lat. 32S24', long. 111°08', In HEiSWi sec. 8, T. 12 3., R. 12 E., 1 1/8 miles southeast of Rillito, 7f miles downstream from Canada del Oro, and 8f miles downstream from Rllllto Creek. Datum of gage is 2,052.33 feet above mean sea level, datum of 1929. Supplementary water-stage recorder 900 feet downstream at datum 1.10 feet higher, referred to as lower gage. Drainage, area.- 3,520 square miles. Records available.- October 1939 to September 1944. Extremes.- Maximum discharge during year, 5,650 second-feet Aug. 16 height, 11.60 feet, upper gags); no flow during greater part of year. 1939-44: Maximum discharge, 17,000 second-feet Aug. 14, 1940 height, 9.9 feet, lower gage); no flow during greater part of each year. Remarks.- Records good above 50Q second-feet and fair below, Many diversions above sta- tlon for Irrigation. Lower gage not used during year.

Disoharge. in aaoond-feet. water year October 1943 to September' 1944 Day Oct. NOT. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 0 0 0 0 0 2 0 0 0 0 0 0 3 0 0 0 0 0 0 4 0 0 0 ' 0 0 0 5 0 0 0 - 0 0 0 6 0 0 0 0 0 0 7 0 0 0 0 343 0 8 0 0 0 1 1,060 0 9 0 0 0 3 891 0 10 0 0 0 0 149 0 11 0 0 0 0 fS 0 12 0 0 0 0 0 2 13 0 0 0 0 234 7 14 0 0 0 0 2 0 IS 0 0 0 0 0 49 16 0 .1 0 0 9,800 1,130 17 0 .6 0 0 61 0 IS 0 .7 , 0 0 5 0 19 0 .3 0 5 6 0 20 0 0 0 * 0 0 0 21 0 0 0 _ 0 0 0 22 0 0 0 210 0 0 23 0 .2 0 221 0 0 24 0 0 .1 19 4 e 25 0 0 0 0 0 0 1 26 .6 0 0 0 0 4 27 .s 0 0 0 0 0 28 0 0 0 0 0 0 29 0 0 0 0 0 0 30 0 0 0 0 0 0 31 0 - 0* 0 0 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

November...... December...... :...... 0 0 0 0 0 Calendar year 1943 ...... 8,859.6 1,180 0 24.3 17,680

0 April ...... 0 0 May...... 0 0 0 W O 2,800 0 11,030 September...... 1,194 1,130 0 39.8 2,370 Water year 1943-44 ...... 7,217.7 2,800 0 19.7 14,320 PeaTt discharge.- Aug. 8 (12:15 a.m.) 4,890 sec.-ft.; Aug. 9 (8 p.m.) 4,740 sec.-ft.; Aug. 16 (11:30 a.m. ) 5,650 see.-ft.} Sept. 16 (1:30 a.m.) 4,310 sec.-ft. f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter*. To convert war time to standard time, subtract 1 hour. CHIA RIVER BASIN 329

Santa Cruz River near Laveen, Arlz.

Location.- water-stage recorder, lat. 33°13', long. 112°10', In NEiNEi sec. 29, T. 2 S., RTTTE., on alia River Indian Reservation, at highway bridge, 3 miles south of Komatke, 9 miles upstream from mouth, and 9i miles south of Laveen. Datum of gage Is 1,021.1 feet above mean sea level, adjustment of 1912 (levels by Office of Indian Affal-rs}. Drainage area.- 8,970 square miles. Records available.- January 1940 to September 1944. Extremes.- Maximum discharge during year, 217 second-feet Feb. 25 (gage height, 5.10 reetj; minimum, 0.1 second-foot on many days. 1940-44: Maximum discharge, 1,890 second-feet July 15, 1942 (gage height, 11.61 feet); no flow on several days during most years. Remarks.- Records good. Many diversions above station, by pumping from underground oasin, for Irrigation and municipal uses.

Discharge, la second-feet, water year October 1943 to September 1944 DaS Oct. Nov. Dec. Jan, Feb. Mar. Apr. "ay June July Aug. Sept. 1 29 0.3 0.8 2 8 9 3 3 0.9 0.9 0.2 0.1 ? 3 .3 1 S S 32 3 3 1 .4 .2 .1 3 .9 .3 1 2 2 15 3 4 2 .3 .2 .1 4 .4 .3 .S a S 5 3 3 1 .3 .2 .1 5 .4 .3 .5 2 2 4 3 4 ,9 .3 .2 .1 6 .3 .4 .9 2 2 3 3 3 .S .3 .2 .1 7 .3 . 1 2 2 3 3 3 .8 .3 6 .1 8 .3 . .6 2 2 3 3 2 .7 .3 79 .1 9 .3 . 19 2 2 3 3 2 .6 .3 23 .1 10 .3 SS 2 2 3 3 2S .6 .3 4 .1 11 .2 ^ 3 2 2 3 3 37 .6 .2 79 .1 12 .2 . 2 2 2 3 3 57 .6 .2 7 .1 IS .2 .6 2 1 2 3 3 9 .6 .2 .6 .1 14 .2 .5 1 2 29 3 4 .8 .2 .4 .1 15 .3 .5 1 2 S 3 2 .7 .2 .3 4 16 .3 .5 2 1 2 31 4 2 .7 .2 .2 64 17 .3 .6 1 2 2 11 3 2 .7 .1 .2 38 18 .3 .5 1 2 2 10 3 2 .3 .2 .1 36 19 .2 .5 1 2 2 a 3 2 2 .1 .1 10 20 .3 .6 2 2 2 5 3 2 1 .1 .1 32 21 .3 .5 10 2 3 4 3 2 .8 .1 .S 80 22 .3 .6 67 2 2 4 3 2 .6 .2 .4 8 23 .3 .5 6 2 2 4 3 2 1 28 .1 4 ?,4 .3 .6 4 2 44 4 3 2 1 5 .1 1 25 .3 .5 3 2 154 4 3 1 .8 .6 .1 1 Sfi .3 .5 2 2 167 3 3 1 .7 .3 .1 8 ?7 .3 .S 2 2 63 3 3 1 .6 .3 .1 2 2ft .3 1 2 S 35 3 4 1 .7 .2 .1 49 29 .3 .6 2 2 41 4 3 1 .5 .2 .1 16 30 .3 .5 2 S _ 4 3 1 .5 .2 .1 S 31 .3 " 3 2 ~ 4 - 1 " .2 .1 - Second- Runoff in Month foot-days Maximum MinimiB Mean acre-feet

29 28 Decenber ...... 171.6 67 .6 5.54 340 Calendar year 1943 ...... 4,466.9 904 .1 12.2 8,630 2 1 1.9 115 167 2 1,130 Hsr^h , 232 32 3 7.5 460 4 3 3.1 1S2 Ihy...... 189 57 1 6.1 375 24.7 2 .5 .32 4» July* ...... 40.7 28 .1 1.31 81 Augu 203.2 72 6.56 403 Septwber...... 279.4 54 .1 9.31 554 Water year 1943-44 ...... 1,916.8 167 .1 S.24 3,800 Time basis; Mountain war time to Dec. 31, 1943; mountain standard tin thereafter. To convert war tine to standard time, subtract 1 hour. 870650 0-45-33 330 GILA BASIN

Sonoita Creek near Patagonia, Arlz.

Location.- Water-stage recorder, lat. 31°30', long. 110°49', In sec. 21, T. 22 S., R. 15 E., unsurveyed, In Spanish land grant of San Jose de Sonoita, 5 miles downstream from Patagonia. Datum of gage Is 3,818.61 feet above mean aea level, datum of 1989. Drainage area.- 210 square miles. Records available.- June 1930 to December 1933, July 1935 to September 1944. Average discharge.- 12 years ,(1930-33, 1935-44), 6.90 second-feet. Extremes.- Maximum discharge during year, 669 second-feet Aug. 9 (gage height, 6.22 feet); no flow on many days. 1930-44: Maximum discharge, about 20,000 second-feet In August 1934 (gage height, 18.0 feet, present alte and datum, from floodmarks), by slope-area method; .no flow for several days during summer of each year. Remarks.- Records good prior to Aug. 7 and poor thereafter, Several small diversions above station for irrigation and mining.

Discharge, in second-feet, water year October 1943 to September 1944

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Bay June July Aug. Sept. I 1.4 1.0 8.0 1V5 2.1 1.9 3.1 1.9 0.5 0 0 0.4 - z 1.3 1.1 2.1 1.5 2.1 1.9 2.9 1.7 .5 0 0 .3 3 1.0 1.2 2.0 1.5 2.3 2.3 3.1 1.7 .6 0 0 .2 4 .9 ' 1.0 2.0 1.5 8.3 2.1 3.1 1.6 .5 0 0 .1 S .8 1.0 1.9 1.5 2.4 2.0 3.6 1.5 .5 0 0 0 S .6 1.1 1.9 1.6 2.4 8.0 3.3 1.3 .5 0 0 0 7 .6 1.1 2.0 1.5 2.3 1.9 3.3 1.-4 .4 0 0 0 8 .7 1.8 2.1 1.5 8.4 1.9 2.7 1.4 .5 0 f26 0 9 .9 1.2 2.3 1.5 2.4 1.9 3.1 1.3 .5 0 136 0 10 .3 1.3 2.1 1.5 8.4 1.7 3.1 1.3 .5 0 7 0 l.l' 11 .8 1.3 2.0 1.4 2.4 1.6 2.4 .3 0 .3 0 12 .9 1.3 1.9 1.5 2.6 1.7 2.9 1.1 .4 0 81 .2 13 .7 1.3 1.9 1.5 8.4 1.5 2.9 1.0 .2 0 2 .7 14 .7- 1.4 1.9 1.5 2.4 1.6 8.7 .e .1 0 al ,& 15 .5 1.5 1.9 1.5 2.4 1.7 2.7 .9 .2 0 8 .5 16 .5 1.4 2.0 1.5 2.6 2.1 2.6 .9 .2 0 3 . * 17 .5 1.4 2.0 1.5 8.6 2.1 8.6 1.0 .3 0 9 .3 ' 1918 .7 1.5 8.0 1.5 2.3 6.3 8.4 .9 .3 0 2 .1 .S 1.6 2.0 1.5 2.3 8.8 8.4 .8 .2 0 2 .1 20 .3 1.6 1.9 1.6 2.3 3.1 2.4 .S 0 0 6 .8 21 .S 1.7 1.9 1.7 2.4 2.4 2.3 .8 0 0 a2 .1 22 .8 1.9 1.9 1.7 2.4 2.3 2.4 .S 0 0 al .1 23 .8 1.7 1.9 1.9 8.1 2.4 2.4 .8 0 8 a8 .1 24 .5 1.7 1.7 8.0 2.6 2.4 8.3 .8 0 0 al .2 25 .5 1.7 1.7 2.1 2.4 8.4 8.3 .3 0 0 al .1 26 .5 2.0 1.9 2.3 2.3 2.4 2.1 .7 0 0 al .1 27 .6 8.1 8.0 2.3 2.4 2.7 2.1 .6 0 0 al .5 28 .7 2..1 1.9 8.3 2.3 2.9 2.3 .5 0 ' 0 a. 5 a. 4 29 .7 2.0 1.7 8.3 2.1 3.3 2.1 .5 0 a. 5 a. 3 30 .8 2.0 1.6 2.3 _ 3.1 1.9 .5 0 0 a. 5 a.2 31 .9 - 1.5 2.3 - 3.1 - .5 ~ 0 a. 5 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet October...... 83.5 1.4 0.5 0.76 47 November...... 44.4 2.1 1.0 1.46 88 December ...... 59.6 2.3 1.5 1.98 118 Calendar year 1943 ...... 2,346.6 357 0 6.43 4,660 January...... 53.2 8.3 1.4 1.78 106 February...... 68.4 2.6 8.1 2.36 136 March . 78.9 e.2 1.5 8.55 156 April ...... 79.5 3.6 1.9 2.65 158 Mavay...... 31.7 1.9 .5 1.02 63 June ...... 7.2 .6 0 .24 14 July...... 2 Z 0 .06 4.0 August ...... 223.8 136 0 7. 38 454 September...... 6.1 .7 0 .80 12 Water year 1943-44 ...... 683.3 136 0 1.87 1,360 a No gage-height record; discharge computed on basis of engineers' estimates and weather records, f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. GIU RIVER BASIN 331

Tucson Arroys at Vine Avenue, Tucson, Arlz.

Location.- Waters-stage recorded and concrete low-water control, lat. 32°13'05". long. 110057'00n , In SWiNEi sec. 18, T. 14 8., R. 14 E., at Vine Avenue,, i mile down­ stream from Arroyo Chlco and 2i miles upstream from mouth. Datum of gage Is 2,411.9 feet above mean sea level (city of Tucson bench mark). Drainage area.- 25 square miles. Records.available.- June to September 1944. Extremes.- Maximum discharge during year, 676 aecond-feet July 22; no flow most of year. Mxlmum discharge known, 2,700 second-feet Aug. 13, 1940, Sept. 24, 1943 (gage height, 9.2 feet, from floodmarks), from rating curve extended above 650 aecond-feet by logarithmic plotting. Remarks.- Records excellent except those below 20 second-feet, which are good.

Discharge, in second feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Uar. Apr. May June. July Aug. Sept.

I 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 .4 0 8 0 23 0 9 0 17 0 10 0 O 0 11 0 0 0 12 0 0 .1 13 0 0 14 0 0 § 15 0 0 47 16 0 69 31 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 21 0 0 0 22 7S 0 0 23 20 0 4.0 24 . 0 0 .8 25 0 0. 0 26 0 0 0 27 0 0 0 28 0 0 0 29 0 0 0 30 0 0 0 31 0 0 Second- y^ Runoff in Month foot-days Maximum Minimum 118811 acre-feet Ooto Move ber~ ...... Deoe her...... Calendar year jamidry Pebr Marc Apr!1...... Ua*r June 0 0 0 0 0 Jsly 98 78 0 3.2 194 Augu at...... 109.4 69 0 5.53 217 SeptMter...... 82.9 47 0 2.76 164 The period...... _ . 575 Peak discharge.- Jiily 22 (9:50 p.m.) 676 sec. -ft.; Aug. 16 (8:30 a.m.) 486 sec. -ft.; Sept. 15 (ll:30 p.m.) 663 see Time has la t Mount iln standard time 332 GIU RIVER BASIN

Rllllto Creek near Wrightstown, Arlz.

Location.- Water-stage recorder, lat. 32°16', long. 110°51', In HEiNEi sec. 31, T. 13 s., R. 15 E., at highway bridge 1 mile downstream from Sablno Creek, 2 miles upstream from Pantano Wash, and 3£ miles northwest of Wrightstown, Drainage area.- 221 square miles. Records available.- June 1940 to September 1944. Extremes.- mxlmum discharge during year, 825 second-feet Aug. 9 (gage height, 4.20 reet); no flow during greater part of year. 1940-44: Maximum discharge, 9,000 second-feet Dec. 30, 1940 (gage height, 7.85 feet); no flow during large part of each year. Remarks.- Records good. Several small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0 4 0 0 2 0 3 0 0 3 1 4 0 0 4 15 4 0 0 S 16 3 0 0 6 14 3 0 0 7 8 3 0 0 8 6 3 0 11 9 6 5 0 116 10 6 8 0 0 11 9 84 0 O 12 12 37 o 1 13 19 46 0 0 14 21 36 0 0 15 16 27 0 o - 16 10 23 0 0 17 12 20 0 0 18 21 16 0 0 19 42 10 0 0 20 52 7 0 0 21 33 & 0 0 22 25 4 28 0 23 22 3 0 6 24 20 2 0 o 25 19 1 0 o

26 17 .6 0 0 27 16 .4 0 0 28 12 .2 0 0 29 9 .1 0 0 30 5 .1 0 0 31 4 " 0 0 Second- Runoff in Month foot-days Maxioua Minima Mean acre-fe»t

October...... 0 0 0 0 0 November...... 0 0 0 0 0 December...... 0 0 0 0 0 Calendar year 1943 ...... 1,251 . 603 0 3.4 8,480 January...... 0 0 0 0 0 February 0 0 0 0 0 March...... 468 52 0 15.1 928 April...... 302.4 46 .]L 10.1 600 Haway...... 0 0 0 0 0 June ...... 0 0 0 0 0 July...... 28 ss 0 .9 56 August 134 116 0 4.3 2S6 September...... 0 0 0 0 0 Water year 1943-44 ...... 932.4 116 0 2.5S 1,850 Time baals' Mountain war tiae to Dee. 31, 1943; mountain standard time thereafter. To convert war tiae to standard tine, subtract 1 hour. GILA RIVER BASIN 333

Rllllto Creek near Tucson, Arlz.

Location.- Water-stage recorder, lat. 32°18', long. 110°59', In sec. 23, f. 13 8., RTTSTE., at Oracle Road Bridge, 4 miles upstream from mouth and 4 miles north of Tucson. Datum of gage Is 2,290.78 feet above mean sea level, datum of 1988. Drainage area.- 903 square miles. Records available.- January 1911 to September 1944. Average discharge.- 31 years (1913-44), 23.8 second-feet. Extremes.- Maximum discharge during year, 4,100 second-feet Aug. 9 (gage height, 8.51 feet); no flow during greater part of year. 1911-44: Maximum discharge, 28,000'*second-feet Dee. 23, 1914, estimated by Arizona Agricultural Experiment Station In 1941 on basis of their original flood record; no flow during greater part of each year. A discharge of 24,000 second-feet occurred Sept. 23, 1929. Remarks.- Records fair. Several small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Dot. Nov. Dec. Jan, Feb. Mar. Apr. May , June July Aug. Sept. 1 0 0 0 0 2 0 0 0 0 3 0 0 0 0 4 0 0 0 0 5 0 t 0 o 0 6 0 0 0 - o 7 0 0 43 0 8 0 2S 560 0 9 0 0 441 Q 10 0 0 6 0 11 0 0 0 0 12 0 0 1 0 13 f5 0 11 6 14 fl 0 0 1 15 . 0 0 0 0 16 0 0 105 5 17 0 o 0 0 18 0 0 0 0 19 0 0 0 0 20 0 0 1 0 21 0 0 1 0 22 0 68 0 0 23 0 265 20 6 24 0 f9 fl 12 25 0 0 0 f9 26 0 0 0 3 27 0 0 0 0 28 0 0 0 0 29 0 0 0 0 30 0 0 0 0 31 - - 0 0 - Seoond- Runoff In Month f cot-days Maximum Miniaua Mean acre-feet October Deoeaber...... 0 0 c) 0 0 Calendar year 1943 ...... 1,312 274 c 3.6 2,600 January ...... 0 0 0 0 March 0 -£) 0 0 May...... 0 0 C) 0 0 0 0 C 0 0 July 370 265 c) 11.9 73^ «t...... 1,190 2,36Cf September...... 42 12 c 1.4 83 Water year 1943-44 ...... 1,608 560 c 4.4 3,190 Peak dlacharge.- July 23 (11 s.m.) 1,670 see.-ft.; Aug. 8 (6:30 a.m.) 4,060 sec.-ft.; Aug. 9 (5:30 p.m.) 4,100 sec.-ft. , f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Tins basis * Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 334 GILA RIVER BASIN

Sabino Creek near Tucson, Arlz.

Location.- water-stage recorder and concrete control, lat. 32°19', long. 110°49', in Et sec. 9, T. 13 S., R. 15 E., half a mile north of Coronado National Forest boundary and 12 miles northeast of Tucson. Drainage area.- 35.0 square miles. Records available.- June 1932 to September 1944. Average discharge.- 12 years, 8.85 second-feet. Extremes.- Maximum discharge during year, 175 second-feet July 8 (gage height, 3.31 reet); no flow July 1-7. . - I 1932-44: Maximum discharge, 4,100 second-feet Mar. 3, 1938 (gage Height, 7.13 feet), from rating curve for spillway of dam 1,000 feet downstream, extended above 2,500 second-feet by logarithmic plotting; no flow at times during several years. Remarks.- Records excellent except those above 50 second-feet and those below 1 seeond- root, which are good. No diversion above station. Slight regulation by several small dams constructed to provide recreational lakes.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 1.2 0.06 Q.04 0.04 7.3 23 11 4.1 0.1 Q o.oe 0.6 2 .8 .06 .04 .04 5.7 23 10 3.9 .1 0 .04 .4 3 .5 .06 .04 .04 4.4 3S 10 3.7 .08 0 .03 .3 4 .6 .06 .06 .04 4.6 34 10 3.2 .06 0 .03 .3 5 .5 .06 .06 .04 4.4 33 10 3.0 .04 0 .03 .2 6 .4 .04 .06 .04 4.1 23 10 2.8 .04 0 .03 .1 7 .4 .04 .06 .04 8.6 18 9.4 2.8 .04 0 .03 .1 8 .3 .04 .06 .04 9.0 15 S.7 2.6 .03 35 .04 .06 9 .4 .04 .06 .04 11 12 12 2.4 .02 9.4 84 .04 10 .7 .04 .06 .04 8.0 13 19 3.9 .02 2.6 30 .04 11 .5 .04 .06 .04 5.2 14 35 5.2 .02 .8 11 .03 12 .4 .04 .04 .04 4.1 16 42 4.1 .02 .3 6.3 .03 13 .3 .04 .04 .04 3.2 IS 42 3.4 .02 .2 4.6 .03 14 .2 .04 .04 .04 2.8 _ 15 30 3.0 .02 .08 3.4 .03 15 .2 .04 .04 .04 2.4 14 21 2.8 .02 .04 2.S .06 16 .1 .04 .04 .04 2.8 12 17 2.4 .02 .04 2.6 .08 17 .1 .04 . .04 .04 2.6 17 15 2.2 .02 .03 2.2 .08 18 .1 .04 .04 .04 2.0 29 12 2.0 .01 .03 1.7' .06 19 .1 .04 .04 .04 1.8 51 11 1.7 .01 .04 1.4 .04 20 .1 .04 .04 .04 2.0 49 9.8 1.4 .01 .06 1.2 .04 21 .1 .04 .04 .04 2.0 31 8.7 1.2 .01 .04 1.5 .03 22 .1 .04 .06 .04 2.4 22 8.0 1.0 .01 .08 3.0 .03 23 .1 .04 .04 .06 1.8 19 7.3 .8 .01 43 11 .03 24 .1 .04 .04 .2 2.S 21 6.6 .8 .01 10 25 .03 25 .08 .04 .04 11 9.8 22 6.0 .7 .01 3.9 7.0 .03 26 .06 .04 .06 6.6 7.6 24 5.7 .4 .01 i.e 3.9 .03 27 .08 .04 .06 4.4 7.0 22 5.2 .4 .01 .9 2.8 .03 28 .08 .04 .04 4.1 7.3 18 5.2 .3 .01 .6 2.0 .03 29 .03 .04 .04 4.4 15 14 4.9 .3 .01 .3 1.5 .03 SO .08 .04 .04 5.2 12 4.6 .2 .01 .2 1.2 .02 31 .08 ~ .04 5.2 - 11 ~ .2 " .1 .9 ~ Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 8 86 1.2 0.08 0 236 IS November...... i!so .06 .04 043 2.6 December ...... 1.46 .06 .04 .047 2.9 Calendar year 1943 ...... 1,606.20 395 0 4.40 3,190 January...... 42.04 11 .04 1.36 83 February...... 149.7 15 1.8 5.16 S97 March 683 51 11 22.0 1,350 April ...... 407.1 42 4.6 13.6 807 May...... 66.9 5.2 .2 2.16 133 June ...... 80 .1 .01 . .027 1.6 July...... 109.54 43 0 3.53 217 August ...... 211.31 84 .03 6.82 419 September...... 2.91 .6 .02 .097 5.8 Water year 1943-44 ...... ' 1,684.92 84 0 4.60 3,340 Peak discharge.- JulT 8 (8 a.m.) 175 see. -ft.: Auc. 9 (12S30 v.m.t 170 sec. -ft. Time basis! Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1'hour. 01LA RIVER BASIN 335

Salt River near Chrysotile, Ariz.

Location.- Water-stage recorder, lat. 33°48', long. 110°30 f , in sec. 5, T. 5 N., R. IB s., imsurveyed, on San Carlos Indian Reservation, 1,200 feet upstream from bridge on U. S. Highway 60, 5i miles northeast of Chrysotile. 8 miles upstream from Clbecue Creek, and 33 miles downstream from junction of Black and White Rivers. Datum of gage ls3,353.8 feet above mean sea level, datum of 1929. Drainage area.- 2,830 square miles. Records available.- September 1934 to September 1944. Average discharge.- 20 years, 664 second-feet. Extremes.- Maximum discharge during year, 2,050 second-fqet Sept. 29 (gage height, 3.91 reet); minimum, 99 second-feet Aug. 6, 7 (gage height, 1.44 feet). 1924-44: Maximum discharge,52,900 second-feet Feb. 7, 1937 (gage height, 15.18 feet); minimum, 89 second-feet July 14, 1939 (gage height, 1.39 feet). Remarks.- Records excellent except those for period of no gage-height record, which are fair. Several small diversions above station.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oot. Nov. Dec. Jan. Feb. Mar. Apr. Bay June July Aug. Sept. 1 203 211 153 156 179 839 864 591 379 130 121 al75 2 IBS 207 149 160 179 987 1,000 576 368 134 115 a!60 3 171 203 153 160 179 1,120 1,100 576 362 143 110 &150 4 168 194 153 164 179 881 1,180 583 352 171 107 a!45 5 168 186 149 175 179 757 l.SSO 662 340 160 102 a!35 6 168 182 153 179 179 679 1,420 562 324 168 99 also 7 164 175 168 164 1S2 501 1,520 562 304 153 133 a!25 8 160 175 164 160 190 403 1,400 569 289 146 186 al£0 S> 156 160 1S2 156 194 368 1,220 569 279 156 293 also 10 . 153 164 186 146 199 346 1,090 591 269 179 346 al£0 11 149 171 182 137 199 379 943 741 856 175 279 al20 12 149 171 175 153 194 542 1,130 781 246 146 237 a!25 13 146 16S 179 156 1S6 6S7 1,360 773 237 140 215 alSO 14 146 168 186 153 182 805 1,490 733 220 130 179 277 15 143 166 182 153 179 978 1,420 757 211 181 164 140 16 143 168 1S2 153 182 839 1,280 749 199 118 156 173 17 143 168 175 156 190 805 1,200 694 186 115 168 1S2 18 146 168 164 160 190 881 1,090 634 179 118 211 164 19 755 168 16S 175 186 987 969 569 175 121 290 160 20 319 - 168 171 171 152 881 890 528 16S 140 395 149 21 251 164 175 171 182 814 822 495 160 205 279 143 ZZ 220 164 179 171 199 656 749 463 149 186 220 134 23 211 164 182 175 1B6 549 694 432 146 S15 194 121 24 194 168 179 190 199 488 656 414 143 220 269 151 25 182 16S 171 224 362 641 649 40S 140 233 294 246 26 175 16S 182 207 .357 S81 627 403 137 203 274 899 "28,27 171 16S 199 194 362 1,060 605 391 134 175 279 754 in 164 190 194 386 1,060 605 385 134 156 246 6S2 29 175 156 179 190 569 943 .634 374 130 146 220 1,400 30 199 153 164 182 « 797 612 368 130 137 8200 709 31 215 - 164 179 - 797 - 374 - 124 a!85 -

Second- Runoff in Month foot-iJays Maximum Minimum Mean sore-feet 6,096 755 142 197 12,090 211 December...... 5,338 199 149 172 10,590 Calendar year 1943 ...... £13,453 8,720 121 585 423,400

589 179 1,120 April ...... 30,499 1,520 605 1,017 60,490

'275 September...... 8,259 1,400 120 16,380 Water year 1943-44 ...... 125,880 1,520 99 344 249,700 a No gage-height record; discharge computed on basis of recorded range in etage and comparison with records for station near Roosevelt. ; Time basla; Mountain war time to Dec. 31, 1943.; mountain standard tims thereafter. To convert war time to standard time, subtract 1 hour. I 336 GILA RIVER BASIN

Salt River near Roosevelt, Ariz.

Location.- Water-stage recorder, lat. 33*37', long. 110°55', In MS* sec. 9, T» 3 N., R. 14 B., unsurveyed, 100 feet downstream from bridge on Globe-Young highway, a quarter of a mile downstream from Final Creek, 1 mile upstream from diversion dam for power canal, 14 miles east of village of Roosevelt, and 17 miles upstream from Roosevelt Dam. Datum of gage is 2,177.14 feet above mean sea level, datum of 1929. Drainage area.- 4,310 square miles. Records available.- October 1913 to September 1944. Average discharge.- 31 years, 979 second-feet. Extremes.- Maximum discharge during year, 4,560 seoond-feet Sept. 26 (gage height, 10.60 feetJ; minimum, 117 second-feet Aug. 7. 1913-44:' Maximum discharge, 117,000 second-feet Mar. 14, 1941 (gage height, 24.4 feet), from rating curve extended above 55,000 second-feet on basis or velocity-area studies and float-area measurements at 66,000 and 102,000 second-feet; minimum, 91 second-feet June 30, 1934. Minimum discharge known, about 42 second-feet Aug. 5", 1911. Remarks.- Records excellent. Several small diversions above station for irrigation. See p. 339 for records for Tonto Creek, which also contributes to Roosevelt Reservoir.

Discharge. In eecond-feet. water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 264 24S 183 198 220 1,870 1,110 730 399 151 148 193 2 840 240 180 190 220 1,450 1,860 709 399 151 134 183 213 236 176 194 216 1,630 1,390 689 394 168 18S 173 4 198 836 176 198 216 1,500 1,490 6S9 385 183 125 164 \s 214 230 180 202 816 1,850 1,620 689 372 803 125 155 6 816 813 180 209 816 1,180 1,770 66S 359 188 125 161 7 196 802 194 215 280 915 1,890 655 334 1S8 181 149 8 194 802 813 208 284 708 1,840. 665 310 198 251 146 9 190 19S 213 194 232 588 1,700 663 399 173 535 146 10 187 194 238 194 244 538 l,5fiO 745 289 173 689 148 11 137 194 220 176 244 668 1,400 775 27$ 186 381 140 187 802 220 169 244 880 1,460 911 867 193 303 138 13 176 202 216 183 840 1,060 1,770 894 261 164 254 140 169 202 824 190 288 1,470 1,940 869 848 155 861 171 15 169 202 220 137 884 1,920 1,890 853 832 149 889 316 16 169 802 216 187 838 1,660 1,700 S69 220 148 198 864 169 198 209 137 244 1,400 1,590 S29 81S 136 188 261 18 176 194 802 187 240 1,380 1,430 768 809 132 190 809 19 856 190 194 190 236 1,490 1,310 708 203 136 835 196 20 733 190 198 194 828 1,330 1,170 635 196 149 376 188 21 37S 194 198 198 244 1,250 1,090 591 185 180 432 173 as 300 190 280 198 256 1,070 1,010 556 178 248 896 166 23 264 194 220 198 260 908 936 516 171 251 248 157 84 260 194 816 284 304 79S 853 483 170 278 264 155 25 836 198 213 852 1,080 883 813 463 164 257 296 27e 26 216 194 224 278 849 1,160 790 458 162 85? 307 1,720 27 805 190 256 856 775 1,370 745 447 157 226 289- 1,260 28 202 190 352 240 756 1,390 738 437 155 193 889 813 29 205 190 836 288 961 1,320 745 418 153 17S 261 1,400 30 209 183 820 22S - 1,150 768 399 -151 166 889 1,310 31 828 - 808 220 - 1,080 - 390 153 209 Second- Runoff in Mouth foot-days Maxima Minimui Mean sore-feet

October...... 7,608 733 169 243 Deceaber...... 6,503 856 176 210 12,900 Calendar year 1943 ...... 261,470 13,100 132 716 518,600

10,069 March

Mav

184 September...... 11,051 1,780 138 36S 81,920 Water year 1943-44 ...... 165,687 1.940 121 453 388,500 IgS&.JiaobarBO.- "ar- 3 (10 a.m.) 1,860 sec. -ft.; Mar. 15 (IsSO a.m.) 2,300 see. -ft. t MBP. 18 (7sOO a.m.) 1,970 sec.-ft.; Sept. 26 (2s30 a.m.) 4,560 sec.-ft. Time baaiai Mountain war time prior to Jan. 1, 1944; mountain standard thereafter. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 337 Reservoir system on Salt River at and below Roosevelt Dam, Ariz.

Location.- This system comprises four storage reservoirs created by four separate dams on Salt River: RooseVelt Lake, formed by Roosevelt Dam, in sec. 20, T. 4 N., R. 12 E., unsurveyed; Apache Lake, formed by Horse Mesa Dam, 17 miles downstream from Roosevelt Dam; Canyon Lake, formed by Mormon Flat Dam, 26 miles downstream from Roosevelt Dam; Sahuaro Lake, formed by Stewart Mountain Dam, 36 miles downstream from. Roosevelt Dam. Drainage area.- 6,220 square miles at Stewart Mountain Dam. Records available.- October 1934 to September 1944. Extremes.- Maximum contents of system during year, 1,258,000 acre-feet Apr. 24-26» 28; minimum contents, 944,400 acre-feet Sept. 30. 1934-44: Maximum contents, 1,764,000 acre-feet May 22, 1941; minimum, 20,680 acre- feet Sept. 16, 1940. Remarks.- Total capacity of the four reservoirs is 1,771,000 acre-feet, divided as - follows: Roosevelt Lake, 1,398,000 acre-feet; Apache Lake, 245,000 acre-feet; Canyon Lake, 58,000 acre-feet; Sahuaro Lake, 70,000 acre-feet. Records given herein represent usable contents. Dead storage negligible. Water from this system is used for'irriga­ tion of Salt River Valley and for generation of power. The four dams forming these reservoirs completely develop fall in Salt River from Roosevelt Lake to Stewart Mountain Dam. Cooperation.- Records of daily contents furnished by Salt River Valley Water Users' Association.

Contents at midnight, In thousands of acre-feet, water year October 1943 to September 1944

Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 1,149 1,094 1,052 1,035 1,031 1,078 1,191 1,256 1,231 1,160 1,080 1,023 2 1,146 1,093 1,051 1,035 1,031 1,086 1,193 1,255 1,229 1,157 1,077 1,022 3 1,144 1,092 1,050 1,036 1,030 1,096 1,195 1,254, 1/22S 1,154 1,074 1,020 4 1,148 1,090 1,049 1,035 1,029 1,103 1,197 1,254 1,226 1,151 1,071 1,01S 5 1,140 1,088 1,048 1,034 1,029 1,10S 1,200 1,253 1,225 1,149 1,068 1,015 6 1,139 1,066 1,048 1,033 1,028 1,113 1,203 1,252 1,223 1,145 1,068 1,013 7 1,135 1,085 1,047 1,033 1,027 1,116 1,207 1,852 1,222 1,142 1,064 1,011 8 1,132 1.084 1,046 1,033 1,027 1,119 1,211 1,251 1,219 1,139 1,062 1,009 9 1,129 l.OSE 1,045 1,033 1,027 1,120 1,216 1,250 1,217 1,137 1,060 1,007 10 " 1,127 1,080 1,045 1,033 1,026 1,121 1,219 1,251 1,215 1,134 1,060 1,003 11 1,126 1,078 1,045 1,034 1,025 1,122 1,222 1,251 ~i,213 1,131 1,059 999.4 12 1,121 1,076 1,044 1,034 1,024 1,124 1,225 1,251 1,211 1,128 1,057 995.1 13 i.iie 1,075 1,045 1,034 1,023 1,127 1,229 1,251 1,209 1,125 1,056 990.7 14 1,116 1,073 1,045 1,035 1,022 1,133 1,233 1,250 1,206 1,122 1,054 986.6 15 1,114 1,072 1,044 1,034 1,021 1,139 1,237 1,250 1,204 1.1SO 1,052 982.3 16 1.11S 1,070 1,044 1-.035 1,021 1,145 1,241 1.24S 1,201 1,117 1,050 979.3 17 1,113 1,069 1,043 1,034 1,022 1,150 1,244 1.24S 1,199 1,114 1,049 977.0 18 1,111 1,068 1,043 1,034 1,022 1,155 1,247 1,247 1,197 1,111 1,047 974.4 19 1,110 1,066 1,042 1,033 1,022 1,159 1,249 1,247 1,195 1,108 1,046 971.3 20 1,110 1,065 1,041 1,032 1,022 1,162 1,251 1,246 1,192 1,106 1,045 96S.2 21 1,109 1,063 1,040 1,032 1,023 1,164 1,254 1,245 1,189 1,104 1,1343 964.6 22 1,106 1,062 1,039 1,033 1,024 1,166 1,256 1,244 1,186 1,101 1,042 960.3 23 1,107 1,060 1,039 1,033 1,024 1,169 1,257 1,243 1,184 1,099 1,040 956.1 24 1,106 1,059 1,039 1,034 1,031 1,171 1.25S 1,241 1,181 1,098 1,038 952.5 25 1,105 1,053 1,039 1,034 1,043 1,173 1,258 1,240 1,177 1,095 1,037 950.5 26 1,103 1,056 1,039 1,034 1,053 1,176 1,25s 1,239 1,174 1,094 1,035 949.8 27 1,102 1,055 1,040 1,034 1,060 1,179 1,257 1,233 1,171 1,092 1,034 948.7 28 1,100 1,054 1,039 1,034 1,066 1,182 1.25S 1,237 1,168 1,090 1,032 946.4 29 1,098 1,054 1,037 1,033 1,072 1,184 1,257 1,236 1,166 1,088 1,030 945.2 30 1,097 1,053 1,034 1,033 _ 1,187 1,257 1,234 1,163 1,085 1,028 944,4 31 1,098 - 1,034 1,033 - 1,189 ' - 1,233 - 1,083 1,026 - Time basiat Mountain war time Oct. 1 to Dec. 31 and Apr. 1 to Sept. 30, 1943; mountain standard time Jan. 1 to Mar. 31. To convert war time to standard time, subtract 1 hour. 338 GIIA RIVER BASIN

Salt River below Stewart Mountain Dam, Arlz.

Location.- Water-stage recorder, lat. 33°33', long. 111°32', In SEi sec. 33, T. 3 M., K. H &., unsurveyed, In Tonto National Forest, three-quarters of a mile downstream from Stewart Mountain Dam and 9 miles upstream from Verde River. Datum of gage Is 1,396.33 feet above mean sea level, datum of 1929. Drainage area.- 6,220 square miles. Records available.- October 1934 to September 1944. Extremes (regulated).- Maximum discharge during year, 2,520 second-feet Sept. 15 (gage neignt, iu.4b reet); minimum, 8 second-feet Jan. 12-17. 1934-44: Maximum discharge, 11,700 second-feet May 7, 1941 (gage height, 15.97 feet); minimum, 3 second-feet Jan. 8-20, 1935, and for several days In January and February 1943. Remarks.- Records excellent. Flow regulated by Stewart Mountain Dam and three other aams (combined capacity, 1,771,000 acre-feet, see preceding page). Water is avail­ able for diversion at Granite Reef Dam, 13 miles downstream, for Irrigation in Salt River Valley.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. 'Sept.

1 1,490 7S9 510 13 652 19 303 1,030 ' 961 1,680 1,490 1,130 2 1,540 900 528 30 645 19 429 1,030 961 1,490 1,540 993 3 1,490 960 684 172 652 18 429 1,020 961 1,470 1,500 1,060 4 1,220 1,010 691 326 645 18 429 1,020 969 1,480 1,430 1,040 5 1,200 1,050 553 419 63 S 18 254 1,020 993 1,510 1,310 1,040 6 1,190 952 631 432 638 17 30 961 1,000 1,690 1,200 1,040 7 1,520 754 832 246 592 17 30 892 1,030 1,690 1,190 1,040 8 1,840 766 848 331 487 25 30 977 1,130 1,600 1,200 1,060 9 1,780 958 718 53 535 403 30 1,040 1,210 1,340 1,180 1,080 10 1,280 1,010 420 14 622 608 30 1,060 1,210 1,340 1,070 2,050 - 11 1,310 1,030 377 9 622 622 30 1,060 1,120 1,390 945 2,380 12 1,400 1,120 316 S 622 630 30 l.TOO 1,070 1,490 945 2,440 13 1,520 1,120 130 e 622 622 30 1,060 1,150 1,420 938 2,440 14 1,470 930 261 e 622 570 30 1,070 1,230 1,320 938 2,440 15 1,380 87S 351 8 595 526 30 1,060 1,260 1,280 938 2,440 16 1,150 908 3SS 8 30 370 30 1,070 1,160 1,290 938 1,910 17 915 878 426 8 19 370 30 1,060 1,100 1,300 - 938 1,360 IB 862 825 444 194 19 536 30 1,05Q 1,020 1,330 938 1,590 id 870 885 436 785 18 630 30 1,040 1,140 1,330 938 1,740 20 900 952 649 522 IB 630 30 1,020 1,300 1,350 938 1,890 21 908 846 813 142 IS 622 30 961 1,500 1,350 938 2,170 22 908 818 631 128 18 40 30 969 1,590 1,350 958 2,200 23 908 990 451 117 18 19 115 1,010 1,570 1,340 1,120 2,050 24 900 1,060 211 125 18 19 622 1,000 1,550 1,190 1,060 1,830 25 885 1,040 85 363 18 19 636 993 1,540 1,110 953 1,760 26 915 1,050 311 285 18 18 829 985 1,460 1,010 930 1,9X9 1,060 1,040 367 221 18 18 1,090 961 1,460 1,130 922 2,020 28 1,080 535 825 250 19 18 1,100 885 1,490 1,230 938 2,090 29 968 480 1,150 308 19 18 1,030 977 1,550 1,260 1,080 2,070 30 922 516 1,080 364 _ 19 1,030 969 1,660 1,310 1,180 1,820 31 796 - 267 465 - 20 - 969 - 1,490 1,190 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet 1,840 72,350 December...... 16,374 1,150 85 528 32,480 Calendar year 1943 ...... 373,452 2,360 1,023 740,800 785 208 12,820 630 11 242 14,870 1,100 3C May...... 1,070 885 1,009 62,040 1,690 84,400 92 £ 66,950 September...... 51,963 2,440 993 1,732 103,100 Water year 1943-44 . ... f ...... 309,014 2,440 e 844 613,000 Time basis; Mountain war time to Do?. 31, 1943; mountain standard time thereafter, fo convert ar time to standard time, subtract 1 hour. QILA RIVES BASIN 339

Tonto Creek above Gun Creek, near Roosevelt, Arlz.

Location.- Water-stage recorder, lat. 33°59', long. 111°18', In NEiSWi sec. 2, T. 7 N., RTTTTE., In Tonto National Forest, 600 feet upstream from Gun Creek, 23& miles north­ west of village of Roosevelt, and 26 miles upstream from Roosevelt Dam. Datum of gage Is 2,523.14 feet, above mean sea level, datum of 1929,. Drainage area.- 678 square miles. Records available.- December 1940 to September 1944. October 1913 to December 1940 at site 10 miles downstream, published as Tonto Creek near 'Roosevelt. Extremes.- Maximum discharge during year, 2,990 second-feet Feb. 24 (gage height, 7.29 feet); minimum, 1.1 second-feet Aug. 8 (gage height, 3.43 feet). 1940-44: Maximum discharge, 32,000 second-feet Mar. 14, 1941 (gage height, 15.1 feet), by slope-area method; no flow July 16-20, 1943. Remarks.- Recorde good. Small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. nay June July Aug. Sept. 1 17 15 13 19 39 1,270 170 105 27 7.4 3.7 1.5 z 14 15 13 19 38 1,250 205 114 27 11 3.5 1.8 3 13 15 13 19 36 1,400 216 123 26 11 3.0 1.3 4 12 16 13 19 33 1,100 22S 111 26 13 2.5 1.3 5 11 16 13 19 32 796 239 98 26 14 1.8 1.5 6 11 16 15 19 30 692 251 9*494 24 12 l.S 1.5 7 11 16 16 19 30 500 235 22 10 l.B 1.5 ft 10 15 17 19 37 396 216 91 20 8.4 6.0 1.3 9 15 22 17 39 348 254 82 20 7.8 9.5 1.3 10 11 16 22 16 41 3S1 247 105 18 7.4 11 1.3 11 12 16 21 16 39 459 328 126 16 7.4 8.4 1.3 12 11 15 19 IS 35 4S4 417 100 16 6.2 7.4 1.3 13 10 15 20 18 31 559 357 S5 16 5.8 6.2 1.3 14 10 15 22 19 28 1,230 514 80 16 5.3 4.5 2.0 15 9 14 21 16 29 1,050 348 78 15 5.3 4.5 8.2 16 9 14 19 17 35 1,060 289 68 15 4.9 4.5 71 17 9 15 16 19 35 884 243 64 14 4.1 4.5 31 1ft 14 16 16 19 33 709 208 60 13 3.7 4.1 17 19 2S 16 18 19 33 581 1S3 58 13 4.5 4.5 13 20 24 16 IS 16 32 444 166 55 13 51 9.6 12 21 16 16 19 17 75 34S 157 53 11 21 7.4 11 ?? 15 16 28 17 191 272 134 50 8.9 9.5 5.6 9.5 23 14 14 29 17 179 216 123 46 8.9 23 3.7 8.4 ?4 13 14 26 21 1,070 212 126 43 8.9 44 3.2 9.5 25 13 13 23 79 1,680 272 128 40 10 15 3.5 11 26 13 13 27 70 1,300 306 121 37 9.5 11 3.2 14 27 13 13 27 57 1,200 276 123 38 8.9 7.8 3.0 25 28 13 13 24 51 1,300 22S 12S 35 7.S 6.6 2.3 101 29 15 13 , 23 48 1,270 190 lie 33 7.8 6.2 2.0 46 30 16 13 21 47 _ 163 107 31 7.4 5.3 l.S 29 31 16 20 42 - ' 163 - 29 - 4.9 1.5 ~ Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

December...... 6 IS 29 13 19.9 1,230 Calendar year 1943 ...... 32,195.3 5,650 0 88.2 63,850

March...... 18,239 1,400 163 588 36,180 6,579 514 219 13,060 71.6 4,400 472.1 27 7.4 15.7 936 11.4 703 140.2 11 1.5 4.52 278 September ...... 436.8 101 1.3 14.6 866 Water year 1943-44 ...... 39,900.6 1,880 1.3 109 79,150" Peak discharge.- Pet. 24 (8 p.m.) 2,990 sec.-ft.; Mar. 14 (5 p.m.) 1,860 sec.-ft. Mountain war tine to Dec. 31, 1943; mountain standard time thereafter.. andard time, subtract 1 hou^. 340 GILA RIVER BASIN

Verde River near Camp Verde, Arlz.

Location.- water-stage recorder, lat. 34°S7', long. 111°47', In sec. 1, T, 12 N., K. t> E., unsurveyed, a short distance downstream from Camp Verde dam site, 750 feet upstream from Chasm Creek, and 9 miles southeast of Camp Verde. Datum of gage Is 2,874.1 feet above mean sea level, datum of 1929. . , Drainage area.- 5,000 square miles (Includes 344 square miles In Aubrey valley Playa, a ciosea oasin). Records available.- April 1934 to September 1944. December 1912 to March 1620 at slta ib mixes upstream (drainage area, 4,220 square miles) published as Verde River at Camp verde. Average discharge.- 10 years (1934-44), 470 second-feet.. Extremes.- Maximum discharge during year, 6,160 second-feet Mar. 14 (gage height, 9.73 reet ) ; minimum, 52 second-feet July 22. 1934-44: Maximum discharge, 97,000 second-feet Mar. 3; 1938 (gage height, 26.1 feet), by elope-area method, verified by comparison with records for other stations on Verde River; minimum, 41 second-feet July 17, 1940. Remarks.- Records good except those for period of no gage-height record, which are fair, small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to Saptember 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay June July Aug. Sept. 1 215 189 199^ 247 256 689 2,490 746 82 85 72 88 2 199 186 210 247 256 988 2,900 507 85 96 72 38 3 192 186 19g 243 252 1,170 2,670 354 99 102 72 75 4 189 182 193 259 232 1,040 2,380 a266 116 106 75 88 5 1S2 179 206 23S 236 1,000 2,870 a214 120 106 82 85 fi 186 169 217 239 239 1,040 2,930 al83 110 102 92 96 7 179 169 239 239 243 S79 2,400 156 92 99 152 92 ft 176 169 255 236 255 627 1,760 145 S2 96 189 99 <» 172 169 879 232 275 552 1,470 13S 85 96 149 102 10 172 176 333 232 309 910 1,200 171 96 92 113 116 11 169 172 279 236 323 1,500 1,750 371 32 88 98 131 1? 169 166 275 236 275 2,170 1,910 403 S2 92 85 110 ia> 166 172 301 232 255 3,000 1,610 302 82 88 as 102 14 166 192 SOS 232 243 4,580 3,660 248 75 32 138 256 15 160 196 279 232 243 2,220 2,390 214 75 72 134 223 Ifi 163 199 263 228 255 1,580 1,520 1SS 72 65 106 160 17 166 196 255 224 247 2,260 1,20O 171 85 65 108 376 1ft 172 196 251 228 243 2,310 865 171 82 es 116 266 IS 189 189 251 221 239 2,340 709 171 7S 72 211 175 20 199 186 251 213 236 2,120 579 164 76 86 167 149 ?1 203 186 351 213 251 1,770 529 156 78 62 142 145 9?. 199 192 275 213 275 1,040 491 152 75 SI 127 134 23 192 192 293 210 239 753 428 142 75 7S 116 134 24 192 196 267 22S 350 1,160 a350 142 75 102 110 142 25 189 196 2S9 232 645 2,670 aSOO 142 75 96 110 142 26 172 186 283 247 556 3,680 a260 134 7S 106 113 164 27 179 179 267 243 486 2.S70 a230 13S 85 99 116 179 2ft 179 189 259 239 4SO 2,120 a230 131 S2 96 110 371 29 182 199 251 236 552 1,520 aSOO 124 7S 82 106 361 30 186 199 251 236 1.120 832 106 82 7S 92 261 31 1S9 ~ 247 236 - 1,660 ~ ^96 ~ 75 92 ~ Second- Runoff in Month foot-days HaxiBua Minima Mean acre-feet

December...... 7,933 332 19£ 256 15,730 Calendar year 1943 ...... 115,424 S,260 56 316 228,900 S47 / 21C 23£! 1tf\a March . w*s...^......

September...... 4,910 376 75 164 9,740 Water year 1943-44 ...... 163, 3S1 4,530 6£ 419 304.200 Peak discharge.- Mar. 14 (S p.m.) R,ifin , «._« ._. »rr., n (A «.m,) 4, inn ».o._f(-. _ _ . __- __ . computed on basis of records for station above Bartlett Reservoir, near Care Creek. * T **f baste; Mountain war tine to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 01 LA RIVER BASIN 341

Verde River above Bartlett Reservoir, near Cave Creek, Arlz_

Location.- Water-stage recorder, lat. 33°57', long.-lll^l', In SEi sec. 13, T. 7N., tt. 6'K., unsurveyed, 4.5 miles downstream from Horseshoe dam site, 16 miles upstream from Bartlett Dam, and 17 miles northeast of Cave Creek post office. Datum of gage Is 1,829.5 feet above mean sea level, datum of 1929. Drainage area.- 6,040 square miles. Records available.- September 1938 to September 1944. Records of unregulated flow have aiso oeen ootamed as follows: February 1925 to February 1939 (prior to closing of Bartlett Dam) at site 21 miles downstream (drainage area, 6,180 square miles), published as Verde River above Camp Creek near McDowell; August to September 1889, January 1895 to November 1899, January 1901 to February 1925 at site 38 miles down­ stream and three-quarters of a mile upstream from mouth (drainage area, 6,620 square miles), published as verde River near McDowell. Average discharge.- 19 years (1925-44), 628 second-feet. Extremes.- Maximum discharge during year, 7,530 second-feet Mar. 14 (gage height, 10.33 ffiet); minimum, 74 eecond-feet, Aug. 7 (gage height, 3.22 feet). 1938-44: Maximum discharge, 100,000 second-feet Mar. 3, 1938 (gage height, 25.0 feet, from floodmarks), based on comparison of peak discharge at other stations on Verde River; minimum, 56 second-feet July 18, 1939 (gage height, 2.55 feet). Flood of Mar. 3, 1938, Is known to be the highest since 1924, Remarks.- Records excellent except those for period of fragmentary gage-height record, which are good. Small diversions above station. Low flow slightly regulated by power plant, 45 miles above station, using water from Fossil creek.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 319 201 233 319 328 2,040 2,160 997 166 107 109 120 2 337 218 236 319 341 2,640 3,020 841 151 103 111 113 3 270 220 236 289 341 3,300 3,220 686 139 96 107 111 4 242 220 220 310 328 2,710 3,080 519 139 101 101 100 5 239 236 220 310 323 2,430 3,150 454 137 111 98 92 6 236 218 215 306 319 2,430 3,150 394 153 117 94 103 7 236 204 249 301 297 1,860 3,020 334 153 124 37 - 107 8 220 186 270 293 306 1,510 2,330 282 151 122 100 103 9 215 198 301 289 323 1,310 1,880 278 137 115 192 98 10 206 206 328 867 382 1,420 1,680 291 128 105 200 93 11 184 206 364 286 403 1,990 1,430 309 137 107 163 85 12 206 204 332 297 4O9 2,570 2,270 449 124 120 135 94 13 215 201 306 293 355 3,350 2,OOO 499 122 120 122 120 14 204 196 346 - 293 319 6,140 3,190 416 12S 117 115 126 IS 206 193 366 293 323 5,120 3,220 338 126 115 132 243 16 204 218 351 293 341 3,350 2,160 316 124 107 17O 346 17 198 236 323 270 3S2 3,840 1,680 298 115 88 153 309 18 191 223 315 289 328 3,350 f 1,300 282 113 87 139 356 19 215 220 315 289 323 3,280 fl,090 865 111 101 151 338 20 239 215 282 293 328 2,760 f945 865 113 116 172 862 21 252 215 314 2S2 433 2,630 f748 250 12O ' 128 205 220 22 258 201 346 278 775 1,820 7O3 220 120 135 189 200 23 246 220 351 274 682 1,300 626 225 115 206 173 189 24 239 236 361 863 1,230 1,07Q 552 22O 111 176 163 186 25 242 229 341 315 3,690 1,991? 514 814 109 142 158 178 26 . 226 223 323 319 2,600 3,710 504 211 96 144 144 194 27 223 215 387 328 2,310 3,560 468 202 100 144 142 285 28 220 215 356 323 2,100 2,700 468 202 117 144 126 269 29 236 204 341 319 1,860 2,140 468 186 115 146 137 523 30 218 220 323 337 . 1,580 488 186 111 130 137 444 31 215 - 328 310 - 1,340 - 176 - 107 ' 128 - Second- Runoff in Month foe t-daya Maximum Minimum Mean acre-feet October 7, 131 337 164 230 14,140 November...... 6,367 186 212 12,630 Deoeaber...... 9,559 387 215 308 18,960 Calendar year 1943 ...... 145,921 9,100 77 400 289,400 January...... 9,247 337 863 296 13,340 February...... 22,430 3,690 297 773 44,490 81,240 6,140 1,070 2,621 161,100 April...... 51,514 3,220 460 1,717 102,200 10,745 997 176 347 21,310 June ...... 3,783 166 98 126 7,500 July...... 3,781 206 87 122 7,500 Aagust...... 4,355 205 87 140 3,640 September...... 6,034 523 85 201 11,970 Water year 1943-44 ...... 216,186 6,140 65 591 438,800 Peak dlscharne,- Feb. 26 (3:30 a.m.) 4.670 see. -ft.: Mar. 3 (6i30 a.n).) 3.920 sec. -ft.: Hap. 14 Apr. 14 (9 p.m.) 4,720 sec.-ft. t Fragmentary gage-height record; discharge computed from partly estimated gage heights. """ ' ' ' Mountain war time to Dec. 31, 1943; mountain Standard time thereafter. To convert to standard tine, subtract 1 hour. 342 01LA RIVER BASIN

Bartlett Reservoir at Bartlett Dam, Ariz.

Location.- Water-stage recorder, lat. 33°49', long. 111°38', in sec. 34, T. 6 N., R. 7 E., unsurveyed. at Bartlett Dam on Verde River. Datum of gage is 1,610.00 feet (adjustment of 1912), or 1,609.46 feet (datum of 1929) above mean" sea level. Drainage area.- 6,160 square miles at Bartlett Dam. Records available.- July 1939 to September 1944. Extremes.- Maximum contents during year, 170,000 acre-feet Apr. 16 (gage height, 184.51 reet;;.no storage at times during October, November, and September. 1939-44: Maximum contents, 184,800 acre-feet Feb. 17, 1941 (gage height, 188.80 feet), of which 2,200 acre-feet was uncontrolled storage; no storage at times. Remarks.- Reservoir is formed by concrete multiple-arch dam; storage began Feb. 5, 1939; aam completed in May 1939. Capacity, 179,500 acre-feet between gage-heights 10.0 feet (10.0 feet above sill of outlet gates) and 188.0 feet (top of spillway ga£es). No dead storage. Water is used for irrigation of lands below reservoir and for ' municipal supply. Figures given herein represent usable contents.

Contents, at 12 p.m. in acre-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. Bay June July Aug. Sept.

1 5,140 20 16,800 16,800 52,600 149,000 148,700 124,400 79,700 54,400 16.80C 2 5,480 178 17,300 17,000 57,700 151,300 149,200 122,900 78,300 53,000 15,20C 3 5,360 552 17,800 16,900 64,100 153,600 148,800 121,300 77,000 51,600 13,70C 4 4,170 938 18,300 16,900 69,600 155,700 148,000 119,800 75,800 50,400 12.EOC 5 2,370 1,340 18,800 17,200 74,400 157,200 147,000 118,300 74,500 49,300 10,40C 6 454 1,720 19,400 17,600 79,200 158,300 145,900 116,900 73,100 48,300 8.15C 7 2,150 19,900 18,200 82,600 159,600 144,600 115,400 71,400 47,200 5,670 8 2,630 20,200 18,800 85,100 160,300 143,100 113,800 69,800 45,900 2^960 9 3,240 20,100 19,200 87,600 160,800 141,400 112,100 68,500 45,500 146 10 3,850 20,300 19,300 90,200 161,300 140,500 110,500 67,100 45,100 (e) 11 4,520 20,200 19,300 .93,600 161,200 140,300 108,900 65,800 44,600 e) 12 5,090 19,700 19,400 98,200 162,600 141,100 107,200 64,500 44,100 i 13 5,420 19,000 19,600 103,500 163,300 142,100 105,500 63,200 43,700 «, 14 ' (e) 6,060 18,200 19,600 114,800 165,900 142,800 103,700 61,900 43,100 e, 15 6,730 17,600 19,500 125,000 169,000 143,200 102,000 60,800 41,900 5£ 16 7,360 17,100 19,300 131,400 170,000 143,000 100,200 60,200 40,600 5£ 17 7,930 16,600 19,200 139,000 169,400 142,700 98,600 59,400 39,000 31 18 8,490 16,700 19,100 145,300 167,600 141,900 97,100 58,200 37,600 (e 19 (e) 9,030 17,000 19,000 151,200 165,100 141,000 95,500 56,900 36,500 ,(e 20 9,540 16,400 18,700 155,000 162,200 140,100 94,100 55,700 35,400 (e 21 10,100 15,200 18,700 157,400 159,000 139,100 92,800 54,700 34,200 (e) 22 10,700 14,000 19,500 156,500 155,900 136,100 91,500 54,100 32,500 (e 23 11,300 12,7/>0 20,200 154,400 153,700 137,000 90,200 54,100 30,600 (e 24 11,900 12,100 22,000 151,900 152, lOt) 135,900 88,900 54,400 28,800 (e 25 12,600 12,600 29,900 150,900 150,100 134,600 87,600 54,600 27,100 (e 26 13,100 13,300 35,400 153,200 148,800 133,100 86,300 54,800 25,800 (e) 27 13,800 13,900 40,300 155,100 148,100 131,800 84,900 55,000 24,700 (e] 28 30 14,500 14,500 44,700 154,800 147,500 130,400 83,600 55,200 23,300 81 29 20 15,100 15,100 48, 600 153,300 147,600 128,900 82,300 55,400 21,600 471 30 28 15,700 15,700 _ 151,300 147, 700 127,400 81,000 55,500 19,900 - B6S 31 - 16,200 16,300 - 149,000 - 125,900 - 55,300 18,300 e Contents less than 14 acre-feet. Stage below lowest operating Intake.

Monthly gage height and contents, water year October 1943 tP September 1944 Change In contents Date Gage height Contents during month (feet! (acre-feet) (acre-feet)

(e) 0 Dec. 31...... 76.25 16,200 +16,170 Calendar year 1943... - - +5,500

+32,300

-37,000 28.12 868 -17,430 Water year 1943-44... - - -3,880 t Gage height at midnight. e Stage below lowest recording Intake'at gage height 12.7 feet, which, because of silting In bottom of reservoir, corresponds to practically no storage (less than 14 acre-feet). Time basis; .Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. \ GILA RIVER BASIN 343

Verde River below Bartlett Dam, Arlz.

Location.- Water-stage recorder, lat. 33°48'30", long. lll^O'OO", In NEi sec. 6, T. b N., R. 7 E., 2i miles downstream from Bartlett Dam and 3l miles upstream from Camp Creek. Datum of gage is 1,572.34 feet above mean sea level, datum-of 1929. Drainage area.- 6,160 square miles. Records available.- January 1942 to September 1944. February 1925 to December 1941 at site 3 mnes downstream, published as Verde River abov? Camp Creek, near McDowell. August to September 1889, January 1895 to November 1899, and January 1901 to February 1925 at site 20 miles downstream, three-quarters of a mile above mouth, published as Verde River near McDowell. Average discharge.- 41 years (1903-44), 780 second-feet (adjusted for storage In Bartlett Reservoir;. Extremes.- Maximum diecharge during year, 2,940 second-feet (regulated) Mar. 29 (gage height, 5.90 feet); minimum, 3 second-feet (regulated) Feb. 9. 1897-1939 (unregulated): Maximum discharge at site near mouth, 96,000 second-feet (estimated) Nov. 27, 1905; at site below Bartlett Dam, 95,000 second-feet Mar. 4, 1938 (gage height, 25.5 feet, present site and datum, by floodmarks), from rating curve for station above Camp Creek extended above 44,000 second-feet on basis of slope-area and other methods of flood computations (see Water-Supply Paper 879, p. 254); minimum, 32 second-feet July 19, 20, 1904. 1939-44 (regulated): Maximum discharge, 45,800 second-feet Mar. 15, 194* (g height, 17.5 feet, present site and datum, by floodmarks); no flow Aug. 4-7, 13. Remarks.- Records good except those for periods of fragmentary gage-height record, which are rair. Small diversions above station for Irrigation. Flow regulated by Bartlett Dam since Feb. 5, 1939 (see preceding page). Natural flow of river was passed through dam when Bartlett Reservoir was empty.

Discharge, in second-feet, water year October 1943 tc September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Ang. Sept.

1 105 225 236 26 49 13 2,140 45S 934 S12 504 990 2 105 22S 15S 24 254 70 1,820 612 934 794 SIS 962 3 266 222 43 22 363 10 1,960 842 927 784 S84 941 4 760 SSS 28 22 329 e 1,950 941 927 77S 706 944 5 1,120 231 20 34 173 7 2,320 976 927 794 706 1,110 '615 6 1,120 225 32 35 113 6 3,500 983 927 836 1,340 7 f483 216 38 34 f4 55 2,370 983 934 976 679 1,420 8 241 193 31 137 f4 215 1,940 1,010 969 941 77S 1,510 9 f214 210 ZZ 330 54 25 1,650 1,110 969 SIS 490 1,540 10 f215 196 12 173 292 52 1,360 847 963 SIS 486 255 11 f!7S 206 11 364 390 167 1,420 424 969 S12 4S6 124 12 1S6 215 35 569 411 256 1,52,0 118 983 806 440 105 13 20B 215 130 6S1 241 531 1,600 71 1,020 800 300 12S 14 213 219 10 710 296 307 1,660 68 1,010 800 435 12B IS 219 219 10 634 423 48 1,630 145 1,010 740 762 16S 16 307 310 10 59S 402 56 ~1,640 300 1,000 454 872 349 17 196 239 10 57S 402 25 1,590 454 902 517 976 357 18 193 244 9 fE57 402 114 2,210 635 908 763 90S 404 19 184 324 9 fllO 402 399 2,320 762 927 794 767 398 20 228 215 9 662 432 778 2,400 762 872 728 712 293 21 244 224 12 942 440 1,330 2,380 762 SOO 652 842 243 22 261 315 12 842 378 2,260 £,280 762 800 517 1,070 213 23 253 224 12 942 323 2,390 1,850 772 794 rise 1,130 221 24 241 244 11 f642 139 2,460 1,440 830 794 f33 1,130 199 25 226 244 13 f7 fS 3,460 1,600 S66 7S9 f33 1,040 199 26 225 229 13 f6 f7 2,500 1,210 941 7S9 33 87S 199 27 222 219 13 5 f7 2,610 920 941 800 35 762 274 28 222 190 17 4 7 2,790 791 941 824 43 884 356 29 231 fSOS 25 4 7 2,860 454 941 812 43 1,060 256 30 231 210 26 4 .. 2,680 440 941 SIS 43 1,040 293 31 £38 - 27 4 - 3,670 - 934 - 202 1,020 " Seccnd- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October...... 9,234 1,120 105 298 15,320 November...... 6,575 244 190 319 13,040 December...... 1,043 236 9 33.6 2/070 Calendar year 1943 ...... 143,160 1,730 0 39 S 284,600 January...... 9,402 942 4 303 18,650 O't'Z February 6,752 440 4 fi*>O 13,390 March...... 30,054 2,860 6 969 59,610 April...... 51,465 2,500 440 1,716 102,100 May...... 23,132 1,110 66 714 43,900 June ...... 37,031 1,020 789 901 53,620 - July ...... 17,384 976 33 561 34,480 August 24,170 1,130 30Q1 790 47,940 September...... 15, SIS 1,540 105 537 31,370 Water year 1943-44 ...... 221,060 2,660 4 604 438,500. f Computed on baaia of partly estimated ga je-helght record. Time baala; nountain war time to Dee. 31, 1943; mountain standard tine thereafter. To convert war time to standard time, subtract 1 hour. 344 GILA RIVER BASIN

Oak Creek near Cornville, Arlz.

Location.- Water-stage recorder, lat. 34°46', long. 111°53', In SEi sec. 23, T. 16 N., ITTTT., at bridge, 0.2 mile upstream from Page Springs, 4 miles northeast of Corn- vine, and 11 miles upstream from mouth. Drainage area.- 357 square miles. Records available.- July 1940 to September 1944. Extremes.- Maximum discharge during year, 2,180 second-feet Apr.' 6 (gage lielght, 6,15 reetj; minimum, 7 second-feet Aug. 7, 8 (gage height, 2.09 feet). 1940-44: Maximum discharge, 5,280 second-feet Mar. 14, 1941 (gage height, 7.36 feet); minimum, 6 second-feet July 27, 1940 (gage height, 1.98 feet). Maximum stage known, 23 feet (from floodmarks) Mar. zf 1938. Remarks.- Records excellent. Several small diversions above station for Irrigation,

, Discharge, In second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 30 36 39 37 3S 80 657 209 20 14 12 12 2 30 36 40 37 40 112 747 122 20 12 10 13 3 30 34 39 37 44 153 710 86 20 11 11 14 4 31 34 37 37 55 179 827 69 24 12 11 14 5 31 36 37 37 65 14S 844 59 23 14 10 14 6 30 35 40 37 56 142 1,070 54 23 12 8 14 7 30 36 53 38 69 107 708 52 20 12 8 13 8 27 36 42 37 91 68 507 50 18 13 8 12 9 27 38 56 36 95 88 444 43 18 12 11 13 10 29 36 43 37 112 163 337 ioe 19 11 16 13 11 30 34 42 37 61 291 see 144 17 11 15 14 12 30 36 41 37 49 430 440 79 16 10 14 14 13 30 35 74 37 45 792 606 55 IS 10 14 14 14 30 36 46 36 44 881 812 46 14 11 14 14 15 SS 36 41 36 43 379 511 42 16 10 14 16 18 30 35 39 36 45 279 399 33 16 10 14 119 17 29 35 39 37 42 352 279 40 16 8 14 , 68 18 30 36 38 37 42 424 181 40 16 10 1* 30 19 41 36 38 37 40 376 141 34 17 12 16 26 20 43 35 i 37 34 39 419 109 33 16 13 16 24 21 38 33 38 36 50 246 Ul 82 15 21 16 24 22 36 34 61 36 58 15S 87 31 15 18 14 23 23 36 36 48 36 49 155 72 -30 16 33 13 21 24 36 34 40 39 129 392 65 30 16 25 13 19 25 35 34 39 46 154 675 65 28 16 24 14 20 26 36 35 ' 39 42 84 ei4 63 25 16 20 14 30 27 34 34 40 102 545 67 23 15 16 13 36 28 34 36 37 40 89 438 73 24 16 14 13 31 29 35 37 37 40 76 287 149 24 14 14 13 30 30 37 37 37 38 _ 260 474 23 13 14 13 30 31 38 ~ 37 37 - 473 - 21 ~ 13 13 - Second- Runoff in Month foot-days Maximum Minimum Mean acre-feet

October ...... 1,011 43 27 32. 6 2,010 November...... 1,053 38 33 96.3 2,100 December ...... 1,318 74 37 42.6 2,610 Calendar year 1943 ...... 26,424 1,900 10 72.4 52,410 January...... 1,165 48 34 a xrr I »wft 2,310 OQA February...... 1 yOVO 154 38 65.4 3/760 March...... v ...... 10,341 881 80 334 20,510 April ...... 12,100 1,070 57 403 24,000 May...... 1,694 209 21 54.6 3,360 June ...... 518 24 13 17.3 1,030 July...... 440 33 8 14.2 873 August ...... 399 16 8 12.9 791 September...... 732 119 12 24.4 1,450 Water year 1943-44 ...... 32,672 1,070 8 89.3 64,800 Time basis; Mountain war time to Dec. 31, 1948J mountain standard tine thereafter. To ?onvert war time to standard time, subtract 1 hour. GILA RIVER BASIN 345

Diversion for city of Phoenix from Verde River at McDowell, Ariz.

Location.- Water-stage recorder and weir, lat. 33°34', long. 111°40', in NEi sec. 30, T. 3 N., R. 7 E., on canal, 2 miles northwest of mouth of Verde River, 3.9 miles down­ stream from intake, 'and 4i miles south of McDowell. Records available.- February 1922 to September 1944 (monthly diversion). Records prior to October 1939 published In Water-Supply Paper 879. Remarks.- Water is diverted from Infiltration galleries and shallow wells on right bank of Verde River in SE£ sec. 6, T. 3 H., R. 7 E., three-quarters of a mile downstream from McDowell and 64 miles upstream from mouth of Verde River for municipal supply of Phoenix and is carried 29 miles to that city by pipe line. Negligible amount of waste occurs below point of measurement. Cooperation.- Records collected by city of Phoenix and furnished by Salt River Valley Water Users' Association.

Monthly diversions, in acre-feet, 1939-44

Month- 1939-40 1940-41 1941-42 1942-43 1943-44 1,520 1,130 1,040 1,060 692 914 1,060 1,110 16,640 19,420 17,660 19,040 17,410 1,030 1,150 1,090 1,140 1,140 1,470 1,390 1,610 May...... 2,050 1,780 2,310 2,440 2,440

19,990

Diversions from Salt River at Granite Reef Dam, Ariz.

Location.- Water-stage recorders at heads of Arizona and South Canals, which divert on right and left banks, respectively, at Granite Reef Dam on Salt River, in lat. 33°31', long. 111°42', 3i miles downstream from Verde River. Records available.- January 1913 to September 1944 (monthly diversion). Records prior to October 1939 published in Water-Supply Paper 879. Remarks.- Records given herein are those of discharge at the two gaging stations less flow returned from canals to river by wasteways between stations and Irrigated lands, and represent flow diverted from Salt River for irrigation in Salt River Valley. Dis­ charge computed on basis of gage heights and current-meter measurements; flow returned to river at canal wasteways computed from records of rated gates or weirs. Flow at Granite Reef Dam Is regulated by four dams on Salt River (see Reservoir system on Salt River at and below Roosevelt Dam), and by Bartlett Dam on Verde River. Cooperation.- Records furnished by Salt River Valley Water Users' Association.

Monthly diversions, In acre-feet, 1939-44 Month 1939-40 1940-41 1941-42 1942-43 1943-44 77 660 43,090 17,700 36,310 52,310 34,660 973 * 000 22 700

May...... 97 290

994 ' 100 870650 O - 45 - 23 346 GILA RIVER BASIN

Agua Fria River near Mayer, Ariz.

Location.- Water-stage recorder, lat. 34°19', long. 112°04', in NWiSEi sec. 20, T. 11 N., K. a t;., at Sycamore dam site, 700 feet downstream from Bigbug Creek and 12 miles southeast of Mayer. Altitude of gage, 3,434 feet (levels by Maricopa County Municipal Water Conservation District No. 1). Drainage area.- 588 square miles. Records available.- January 1940 to September 1944. Extremes.- Maximum discharge during year, 3,800 second-feet Sept. 16 (gage height, 7.3 reet), from rating curve extended above 1,500 second-feet on basis of slope-area determinations at gage heights 9.44 and 11.97 feet; negligible flow at times during summer months when entire flow was diverted to Perry Canal above station, seepage flow only past gage. 1940-44: Maximum discharge, 13,000 second-feet Mar. 1, 1941 (gage height, 11.97 feet), by slope-area method; negligible flow at times during summer months in most years when entire flow was diverted to Perry Canal above station, seepage flow only past gage. Remarks.- Records good except those tor period Oct. 20 to Nov. 3, when discharge was com- putea on basis of recorded variation in ground-water level, and those for periods of fragmentary or no gage-height record, which are fair. Diversions above station for irrigation and mining. Figures of daily discharge do not include water diverted Just above station to Perry Canal.

Discharge, in second-feet, water yesr October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Har. Apr. Hay June July Aug. Sept. 1 2 2 3 6 8 203 4 4 1 0.5 0.5 ao.5 2 1 2 3 6 15 201 3 4 1 .5 .5 a.5 3 1 2 3 5 7 180 3 3 1 .5 .5 a.5 4 1 2 3 6 6 99 3 2 1 .5 .5 5 1 2 3 4 S 105 3 1 1 .5 .5 a.5 6 1 2 4 5 5 91 3 1 l .5 .5 a.S 7 1 1 7 4 5 40 3 1 .9 .6 4 a.5 8 1 2 5 6 5 28 3 1 .6 .6 1 a.5 9 1 1 S 6 5 28 S 1 .6 .5 8 f33* 10 1 1 6 5 4 64 7 17 .6 .5 1 11 1 2 5 5 4 91 6 10 .6 .6 f.6 a2 12 2 2 6 6 3 99 5 6 .6 .5 f.5 a. 7 13 2 2 5 5 4 109 10 6 .6 .5 f.3 a. 2 14 2 1 6 5 4 363 30 4 .6 .5 f.3 166 15 2 1 5 4 4 139 12 3 .6 .5 f.B 21 16 2 2 4 4 5 113 S 2 .6 .5 f.2 226 17 2 2 4 4 5 116 6 3 .6 .6 .2 f45 18 8 2 4 5 5 58 5 3 .6 .6 4 a3 19 13 2 4 4 5 38 5 3 .6 .6 166 a2 20 4 2 4 4 4 30 4 5 .5 .8 f!2 al 21 3 2 5 4 11 24 4 4 .5 .9 f2 22 3 2 7 4 9 16 4 4 .3 .9 al a.5 23 3 2 5 4 10 11 3 3 .3 1 al 24 2 3 5 4 516 11 4 3 .3 .9 al a.5 25 2 3 5 4 208 10 4 3 .2 .6 al a.S 26 2 3 10 4 116 12 4 2 .2 .6 a.S fS5 27 2 3 6 4 276 13 3 2 .3 .6 a.5 f63 28 2 3 5 3 246 10 4 1 .3 .6 f97 29 2 3 6 3 188 8 4 1 .5 .6 a°.5 f!5 30 2 3 5 3 8 4 1 .3 .6 a.5 f2 31 2 5 3 5 1 .5 a.5 Adjusted for diversion Observed Diversion Konth Second- Discharge in second-feet Runoff ffunoff Mean Perry Canal in [second- foot-days Maximum Minimum Mean acre-feet (acre-feet) acre-feet feet) Oct 74 13 I 2.4 147 0 147 2.4 Kov 62 3 1 2.1 123 0 123 2.1 Dec 156 10 3 5.0 309 0 309 5.0 Calendar year 1943...... 2,982.8 636 .1 6.17 5,910 314 6,224 8.6 Jan 139 6 3 4.5 276 0 276 58.24.5 ' Peb 1,689 516 3 5S.2 3,350 0 3,350 Har 2,323 363 5 74.9 4,610 4 4,614 75.0 Apr 169 30 3 5.6 335 84 419 7.0 Hay 105 17 1 3.4 208 43 251 4.1 Jiin 17.8 1 .2 .59 35 55 90 1.5 Jul 18.7- 1 .5 .60 37 35 72 1.2 Aug ust...... 210.6 166 .2 6.79 418 25 443 7.2 Sep 769.4 226 .2 25.6 1,530 17 1,547 25.9 Water year 1943-44..... 5,733.5 516 .2 15.7 11,380 263 11,643 16.0 Peak discharge. - Peb. 24 (3:30 p.m.) 2,310 sec. -ft.; Sept. 16 (9 p.m.) 3,800 sec. -ft. a No gage-height record; discharge computed on basis of records for Hassayampa River near Wagoner and Verde River nea r Camp Verde, f Fragmentary gag e-height record; discharge computed on basis of partly estimated gage-heights, Time basis: Houn sain war time. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 347

Agua Frla River at Lake Pleasant Dam, Arlz.

Location.- Staff gage, lat. 33°51', long. 112°16', in NWi sec. 21, T. 6 N., R. IE., at " left upstream end of Lake Pleasant Dam, 24* miles upstream from mouth of New River. Datum of gage is 1,431.2 feet above mean sea level, datum of 1929. Drainage area.- 1,460 square miles. Records available.- November 1910 to September 1924 (published as Agua Fria River near oienaaie), octocer 1933 to September 1944. Extremes.- Maximum discharge known, about 105,000 second-feet Nov. 27, 1919; no flow during spring and summer of several years. Remarks.- Records poor. Figures given herein represent flow into Lake Pleasant. Dis- cnarge computed on basis of three factors as follows: 1. Change in contents of Lake Pleasant and in contents of small reservoir behind diversion dam li miles downstream from Lake Pleasant. 2. (a) Release from Lake Pleasant as measured by water-stage recorder and sharp-crested rectangular weir in canal 650 feet downstream from Intake at diversion dam, rated and frequently checked by a Clausen-Pierce weir rule; and (b) spill from Lake Pleasant as measured over diversion dam (none in water year 1943-44). 3. Effect of rainfall and evaporation on lake; evaporation assumed as 0.7 of that measured once dally in 3-foot-square buried land pan near left end of Lake Pleasant Dam. Effect of bank storage and bank release in Lake Pleasant is not taken Into account. Diversions above Lake Pleasant for irrigation. Cooperation.- Records collected and prepared in cooperation with Marlcopa County nunieipai Water Conservation District No. 1.

Monthly discharge, water year October 1943 to September 1944

Month Mean Runoff In (second- feet) acre- feet

4.8 297 2S.8 SO, 860

April ...... Hay...... :...... S ot

TQ P 36.5 2,170 Water year 1943-44...... 5S.2 42,280 Time basis; Mountain war tine. To convert war time to standard tine, sub- tract 1 hour. 348 GILA RIVER BASIN

Lake Pleasant at Lake Pleasant Dam, Arlz.

Location.-ru- Staff gage,ga lat. 33°51', long. 112°16', In NWi sec. 21, T. 6 N., R. IE., at upstream end of Lake Pleasant Dam on Agua Frla River. Datum of gage Is 1,431.2 feet above mean sea level, datum of 1929. Drainage area.- 1,460 square miles. Records available.- February 1928 to September 1944. Extremes.- Maximum contents during year, 36,600 acre-feet Apr. 22 (gage height, 114.06 reet); minimum, 2,200 acre-feet Nov. 17, 18. 1928-44: Maximum contents, 178,500 acre-feet Apr. 19, 1941 (gage height, 170.13 feet) of which 500 acre-feet was uncontrolled storage; no storage Sept. 5, 4.933, July 19 to Aug. 13, 1940. Remarks.- Lake Is formed by multiple-arch dam; dam completed and storage began In 1927. capacity, 178,000 acre-feet between gage heights 57.0 feet (22.0 feet above center line of outlet works) and 170.0 feet (top of spillway gates). There Is no storage below gage height 57.0 feet because of accumulated silt. Water released from reser­ voir flows down river channel l£ miles to diversion dam where It Is diverted for Irrigation near Beardsley. Figures given herein represent usable contents In Lake Pleasant. Contents of small reservoir formed by diversion dam is not Included. « Cooperation.- Gage-height record furnished by Marlcopa County Municipal Water Conserva- tion District No. 1.

Contents at 5 p.m.. In acre-feet, water year October 1943 to September 1944 *9 Oot. Nor. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept.

1 6,910 3,730 2,260 2,540 2,690 16,200 34,700 34 , 500 26,100 19-, 000 11,600 4,530 2 6,830 3,620 2,260 2,540 2,700 17,100 34,800 34,200 25,900 18,800 11,300 4,450 3 <6,720 3,490 2,260 2,550 2,700 18,400 34,900 33,800 25,700 18,500 11,000 4,370 4 6,610 3,390 2,260 2,560 2,710 19,400 35,000 33,600 25,400 18,300 10,700 4,270 5 6,530 3,260 2,270 2,570 2,710 20,100 35,100 33,300 25,200 18,100 10,400 4,190 6 6,400 3,130 2,280 2,580 2,720 20,800 35,300 33,000 25,000 17,900 10,200 4,090 7 6,290 3,000 2,290 2,580 2,730 21,400 35,300 32,600 24,700 17,600 9,390 3,980 8 6,190 2,880 2,300 2,580 2,740 21,300 35,400 38,400 24,500 17,400 9,640 3,380 9 6,060 2,790 2,320 2,580 2,740 22,100 35,500 32,000 24,300 17,200 9,360 3,790 10 5,390 2,710 2,330 2,590 2,750 22,400 35,600 31,800 24,100 17,000 9,160 3,690 11 5,780 2,620 2,340 2,590 2,750 22,700 35,800 31,600 23,900 16,800 8,920 3,590 12 5,700 2,540 2,350 2,600 2,750 23,300 35,800 31,400 23,700 16,600 3,680 3,500 13 5,570 2,480 2,360 2,600 2,750 23,800 35,900 31 , 100 23,500 16,400 8,450 3,410 14 5,430 2,420 2,370 2,610 2,760 25,700 36,000 30,900 u 23, 200 16,200 3,200 3,330 IS 5,340 2,350 2,3SO 2,610 2,760 28,000 36,200 30,600 23,000 16,000 8,010 3,330 16 5,240 2,270 2,380 2,620 2,780 29,000 36,300 30,200 22,700 15,800 7,770 3,940 17 5,140 2,200 2,380 2,620 2,780 29,900 36,300 29,900 22,500 15,600 7,560 4,180 18 5,010 2,200 2,380 2,620 2,790 30,700 36,400 29 , 600 22,200 15,300 7,300 4,250 19 4,930 2,210 2,390 2,620 2,790 31,400 36,400 29,400 22,000 15,100 7,130 4,120 20 4,350 2,210 2,400 2,620 2.SOO 31,800 36,500 29,300 21,700 14,800 7,000 4,010 21 4,760 2,220 2,410 2,630 2,810 32,300 36,500 29,100 21,500 14,600 6,840 3,900 22 4,660 2,220 2,460 2,630 2,850 32,600 36,600 28,900 21,200 14,300 6,580 3,820 23 4,570 2,230 2,460 2,640 2,930 32,900 36,400 28,600 21,000 14,200 6,340 3,750 24 4,480 2,230 2,460 2,650 3,080 33 , 100 36,300 23,300 20,700 13,800 6,120 3,670 25 4,380 2,240 2,470 2,660 7,550 33,300 36,100 27,900 20,400 13,500 5,380 3,590 26 4,290 2,240 2,500 2,670 9,990 33,600 35,900 27,700 20,000 13,200 5,630 3,520 27 4,200 2,240 2,500 2,670 12,100 33,900 35,600 27,400 19,800 12,900 5,400 3,590 28 4,120 2,250 2,510 2,6SO 14,000 34,100 35,300 27,100 19,600 12,600 5,170 3,730 29 4,040 2,250 2,520 2,680 15,200 34,300 35,000 26,900 19,400 12,400 4,910 3,860 30 3,950 2,250 2,520 2,680 _ 34 , 400 34,800 26,600 19,200 12,100 4,740 3,850 31 3,840 - 2,530 2,690 - 34 , 500 - 26,400 - 11,800 4,640 -

Monthly gage height and contents, water year October 1943 to September 1944 Change In contents Contents Date Gage height during month (feetjj- (acre-feet) (acre-feet)

Dec. 31...... 70.54 2,530 4-280 Calendar year 1943... - - +1,600 +160 95 29

75.02 3,850 -790 Water year 1943-44... - - -3,120 t Gage height at 5 p.m. ^ Time basis; Mountain war time. To convert war time to standard time, subtract 1 hour. GILA RIVER BASIN 349

Hassayampa River near Wagoner, Ariz.

Location.- Water-stage recorder, lat. 34°18', long. 112°34', In NEiSEi sec. 9, T. 11 N., R. 3 W., at bridge on Klrkland Junction-Wagoner road, 5i miles upstream from Milk Creek and 7% miles upstream from Wagoner. Datum of gage Is 3,741.51 feet above mean sea level, unadjusted. Drainage area.- 79 square miles. Records available.- January 1940 to September 1944. Extremes.- Maximum discharge during year, 138 second-feet Sept. 27 (gage height, 3.43 reet;; minimum, 0.5 second-foot Oct. 1. 1940-44: Maximum discharge, 1,700 second-feet (estimated) Apr. 16, 1941; maximum gage height, 5.10 feet Aug. 9, 1943; minimum discharge, that of Oct. 1, 1943. Remarks.- Records fair except those for periods of fragmentary or no gage-height record, wnicn are poor. Small diversions above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. liar. Apr. May June July Aug. Sept.

1 0.6 1.6 3 2 2 5 20 10 2 l.S 1.8 1.8 2 .7 1.6 3 2 2 9 22 11 l.S 1.8 1.8 1.8 3 .7 1.6 3 2 3 10 22 14 l.S 2 2 2 4 .8 1.6 2 2 2 9 23 13 l.S 3 2 2 5 .8 1.6 2 2 3 13 26 10 1.8 2 1.8 1.8 6 1.0 1.6 3 1.8 3 12 24 10 1.8 2 1.8 1.8 7 1.0 1.6 3 1.8 5 9 23 9 1.8 3 1.8 1.8 8 1.0 1.6 3 1.8 3 8 22 9 1.8 3 3 2 9 1.0 1.6 3 i.e 3 9 24 8 1.6 2 3 2 10 1.0 1.6 3 1.8 2 11 21 8 1.6 2 3 2 11 1.2 1.6 3 2 2 16 19 8 1.6 2 £ 3 12 1.4 1.6 3 2 2 20 17 8 2 2 1.8 2 13 1.9 1.6 2 2 2 28 21 7 3 2 l.S 2 14 .9 1.6 2 2 i.e 26 22 6 2 1.8 1.8 1.9 15 .8 1.6 2 2 1.6 26 20 5 2 1.8 1.8 3 16 .8 i.e 1.8 2 1.6 31 20 5 2 1.8 2 7 17 .8 1.8 1.8 2 1.4 31 19 5 , 2 1.8 3 4 18 3 1.8 i.e 2 1.4 29 17 4 2 2 4 4 19 .9 1.8 1.8 1.8 1.2 17 15 4 1.8 2 3 3 20 .8 2 1.8 1.8 1.0 16 14 4 l.S 3 2 3 21 .8 2 1.8 1.8 l.S 16 13 3 1.8 6 2 3 22 1.0 2 1.8 i.e 1.6 16 13 3 2 3 1.8 2 23 1.0 2 1.8 1.8 3 16 11 3 1.8 1.8 1.8 2 24 1.0 2 1.8 2 21 17 11 3 1.8 1.8 2 2 25 1.2 2 1.8 1.8 8 20 10 3 1.8 1.4 3 2 26 1.2 2 2 1.8 5 23 10 2 2 1.4 S S 27 1.2 3 2 2 7 20 10 2 1.8 1.6 1.8 f6 28 1.4 3 2 2 4 19 13 3 1.8 1.6 1.8 f5 29 1.4 3 2 3 5 19 13 3 1.8 1.8 1.6 a3 30 1.4 3 2 2 - 17 11 2 1.8 1.8 1.8 a2 31 1.6 - 2 3 - 18 - 2 - 1.8 1.8 - Second- Runoff in Month Too t-days Maximum Minimum Mean acre feet

October ...... 33.6 3 0.6 i.oe '11367 November...... 57.2 3 1.6 1.91 December...... 70.0 3 1.8 2.26 139 Calendar year 1943 ...... 818.8 40 .6 2.24 1,620 January...... 61.6 3 - 1.8 1.99 122 February...... 98.4 21 1.0 3.39 195 arch...... 536 31 5 17.3 1,060 April...... 526 26 10 17.5 1,040 May...... 187 14 2 6.0 371 June ...... 56.4 3 1.6 1.88 112 July...... 66.8 6 1.4 2.15 132 August ...... 66.6 4 1.6 2.15 132 September ...... 80.9 7 1.8 2.70 160 Waiter year 1943-44 ...... 1,840.5 26 .6 5.03 3,640 Peak discharge.- Feb. 24 (1 p.m.) 55 see.-ft.; Sept. 27 (1 p.m.) 138 sec.-ft. a Ho gage-height record; discharge computed on basis of discharge measurement made Oct. 4, 1944. f Fragmentary gage-height record; discharge computed from partly estimated gage heights. Note.- Channel not directly connected to gage because of sand bar Oct. 19 to Nov. 2, May 4-18, July 23 to Aug. 1, Aug. 19 to Sept. 14, Sept. 16-27; discharge computed on basis of recorded vari­ ation in ground-water level. Time basis; Mountain war time to Dec. 31, 1943;.,mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 350 GILA RIVER BASIN

Hassayampa River near Morristown, Arlz.

Location.- Water-stage recorder, lat. 33°53', long. 112°39', In SEi sec. 3, T. 6 N., R. 4 w., 600 feet downstream from San Domingo Wash, 900 feet upstream from Atchlson, Topeka, & Santa Fe Railroad bridge, and 3.0 miles northeast of Morristown. Datum of gage is 1,831.16 feet above mean sea level, datum of 1929. Drainage area.- 774 square miles. Records available.- October,1938 to September 1944. Extremee.- Maximum discharge during year, 3,520 second-feet Aug. 9 (gage height, 8.10 reet), from rating curve extended above 1,600 second-feet; no flow during long periods. 1938-44: Maximum discharge, 7,700 second-feet Aug. 3, 1943 (gage height, 9.9 feet), from rating curve extended above 1,600 second-feet on basis of slope-area- determlnatlon at 6,100 second-feet; no flow on many days each year. Remarks.- Records fair except those for periods of fragmentary or no gage-height record, which are poor. Many small diversions above station for Irrigation and mining.

Discharge, in second-feet, water year Octcber 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. 1 0.6 1.1 0.9 1.4 3 65 a26 4 0.3 0 0 0 2 .6 .9 1.1 1.5 2 86 a28 5 .2 0 0 0 3 .6 .9 1.1 1.4 3- 94 a30 5 .2 0 0 0 4 .7 .9 1.4 1.4 3 73 a30 4 0 0 0 0 5 .6 1.1 1.3 l.S 4 40 a31 5 0 0 0 0 6 .6 .9 1.4 2 4 29 a32 a5 0 0 0 0 7 .6 1.4 1.0 1.8 4 24 a31 a5 0 0 0 0 R .6 1.8 1.1 2 4 22 a3Q 5 0 0 0 0 9 .9 1.8 3 1.5 3 21 a32 6 0 0 162 0 10 .7 1.5 1.5 i.e 2 23 34 4 0 0 22 0 11 .6 1.4 > .4 1.5 2 33 29 3 0 0 1.2 0 12 .6 1.3 .e l.S 2 52 25 3 0 0 a. 8 0 13 .7 1.3 .5 2 2 59 25 3 0 0 a. 5 0 14 .7 1.3 .3 1.5 2 117 a24 2 0 0 .3 0 15 .8 1.0 .4 1.8 4 fl!9 a 25 2 0 0 .4 0 16 .8 1.2 .4 l.S 3 f!08 a24 2 0 0 0 0 17 .8 1.2 .5 3 2 107 a23 2 0 0 0 0 18 150 1.0 1.4 3 2 88 22 2 0 0 .4 0 19 113 1.1 1.7 3 3 S2 20 2 0 0 1.1 0 20 a3 1.1 1.3 2 4 61 20 1.5 0 0 .3 0 21 al 1.1 1.5 2 6 47 17 1.3 0 0 0 0 22 ^1 1.3 1.2 3 32 15 1.1 0 0.1 0 0 23 al 1.3 1.3 3 8 34 13 1.1 0 1.5 0 0 24 al 1.4 1.5 4 494 29 12 1.1 0 0 0 0 25 al 1.3 1.5 4 278 28 10 1.0 0 0 0 0 26 al 1.3 5 5 90 34 9 .9 0 0 0 0 27 al 1.5 3 4 57 35 S .7 0 0 0 0 28 al 1.5 1.8 3 92 30 8 .7 0 0 0 0 29 al 1.5 1.5 3 104 a27 6 .6 0 0 0 a2 SO al 1.0 1.5 2 _ a26 5 .3 0 0 0 al 31 1.1 - 1.5 2 - a24 - .3 - 0 0 - Seccnd- Runoff in Month foot-days Maximum Minimum Mean acre-feet 0.6 9.31 572 .9 1.25 74 December ...... 49. S 5 .9 1.61 99 Calendar year 1943 ...... 1,815. S 736 0 4.97 3,600 5 1.4 2.35 145 Febr 1,194 494 2 41.2 2,370 Hare 1,649 119 21 53.2 3,270 644 34 5 21.5 1,280 Hay 79.6 6 .3 2.57 158 .7 .3 0 .02 1.4 July ...... 1.6 1.5 0 .05 3.2 Augu 1S9.0 162 0 6.10 375 September...... :...... 3 2 0 .10 6.0 Water year 1943-44 ...... 4,209.7 494 0 11.5 8,350 Peak discharge.- Oct. 16 (7 p.m.) 2,420 sec.-ft.; Feb. 24 (7 p.m.) 1,510 sec.-ft.; Aug. 9 (9 p.m.) 3,520 see.-ft. a Wo gage-height record; discharge computed on basis of comparison with records for station near Wagoner and other Information. f Fragmentary gage-height record; discharge computed on basis of partly estimated gage-height record. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. SULPHUR SPRING VALLEY 351

WHITEWATER DRAW BASIN

Whltewater Draw near Douglas, Ariz.

Location.- Water-stage recorder, lat. 31°21'15", long. 109°35'00", In SWiSEi sec. 10, T. «24 S., R. 27 E., at bridge on U. S. Highway 80, 14 miles upstream trim Inter­ national boundary and 2 miles west of Douglas. Datum of gage Is 3,907.10 feet above mean sea level, datum of 1929. Drainage area.- 1,023 square miles. Records available.- August 1911 to April 1922, June 1930 to December 1933, May 1935 to septemoer 1944. Average discharge.- 12 years (1930-33, 1935-44), 9.66 second-feet. Extremes.- Maximum discharge during year, 2,190 second-feet Aug. 16 (gage height, 9.78 reet); minimum, 0.2 second-foot several days In July and August. 1930-44: Maximum discharge, 3,450 second-feet Aug. 10, 1931 (gage height, 12.15 feet); minimum, 0.1 second-foot May 26, June 9, 1937, July 11, 1939. Maximum discharge known, 4,050 second-feet (estimated^ July 27, 1919. Remarks.- Records good except those for periods of no gage-height record, which are fair. Diversions.above station for Irrigation.

Discharge, in second-feet, water year October 1943 to September 1944 Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept . 1 1.2 0.7 0.9 0.5 0.5 0.6 0.7 0.5 0.6 0.3 0.2 0.7 2 3 4 1.0 5 6 .9 .4 118 7 6.6 8 9 10 1.0 2.3 .4 .5 .6 .7 .4 .3 .6 22 4.0 11 22 12 1.0 .7 .4 .4 .6 .7 .4 .4 .5 4.0 1.2 < 13 .e .6 .4 .4 .6 .7 .4 .3 .5 .5 .8 14 .9 .5 .4 .4 .5 .7 .3 .3 .4 .4 .8 15 .9 I? .5 .4 .4 .6 .7 .3 .3 .5 301 4.4 16 .9 .7 . .5 .4 .5 .7 .7 .3 .3 .5 611 1.9 17 .9 .7 .5 .4 .5 .9 .6 .3 .3 .7 108 1.1 18 .8 .7 .4 .4 .5 1.1 .6 .4 .3 .5 874 .8 19 .8 .8 .4 .4 .4 19 .6 .4 .4 70 217 .8 20 .S .S .5 .4 .4 1.5 .6 .4 .3 67 146 .8 21 .S .8 .4 .4 .5 .9 .6 .4 .3 97 8.5 .8 22 .S .7 .4 .4 .6 .8 .6 .4 .3 189 a4 .7 23 .3 .8 .4 .5 .6 .8 .6 .4- .3 138 a2 .8 24 .7 .8 .4 .5 .7 .7 .6 .4 .3 26 al 1.1 25 .7 .9 .4 .8 .8 .7 .6 .5 .3 1.0 al 1.1 26 .7 .9 .5 .7 .7 .7 .5 .5 .4 .3 al 1.2 27 .7 .9 .5 .7 .7 .7 .5 .5 .3 .3 a 7 17 28 .7 .9 .5 .6 .7 .7 .5 .5 .3 ,2 a 7 1.6 29 .7 .9 .5 .6 .6 .7 .5 .7 .3 .2 a 7 .7 30 .7 .8 .5 .5 .7 .5 .5 .3 .3 7 .6 31 .7 .5 .5 .7 .5 .3 7 Seoond- Runoff in Month foot-days Maximum Minimum Mean acre-feet

Octo ber...... 26.7 1.2 0.7 0.86 53 Nove 22.6 .9 .7 .75 45 Deoe 23.1 3.5 .4 .75 46 Calendar year 1943 ...... 3,936.6 549 .3 10.3 7,810 Janu ary 14.4 .8 .4 .46 29 Febr 15.2 .S .4 .52 30 Marc 40.4 19 .5 1.30 80 Apri 1...... 19. t .7 .5 .64 38 May. 13.2 .7 .3 .43 26 June 12.1 1.0 .3 .40 24 July 538.6 138 .2 17.4 1,070 Augu st ...... 2,314.6 874 .2 74.7 4,590 September...... 195.6 118 .6 6.52 388 Water year 1943-44 ...... 3,235.6 S74 .2 8.8* 6,420 Peak discharge.- Aug. 16 (7 a.m.) 2,190 sec.-ft.; Aug. IS (1:30 a.m.) 1,710 sec.-ft., a Ho gage-height record; discharge computed on basis of typical recession curve. Time basis; Mountain war time to Dec. 31, 1943; mountain standard time thereafter. To convert war time to standard time, subtract 1 hour. 352 MISCELLANEOUS DISCHARGE MEASUREMENTS

Measurements of stream flow in the Colorado River Basin made at points other than gaging stations are given in the following table: .

Mlaoellaneous discharge measurements In Colorado River Basin, during water year October 1943 to September 1944* Tributaries above Gunnison River Date Stream Tributary to or Discharge diverting from Locality (sec. -ft.) Oct. 12 South Fork Williams River.. Sec. 17, T. 3 S., R. 77 W., at mouth, near 9.5 Williams Rlyer Leal, Colo. HOT. 16 23.0 June 21 282 Aug. 22 12.7 Sept. 29 7.2 Oct. 10 Simp 3 on Creek... Eeyser Creek.... Sec. 33, T. IS., R. 77 W., at mouth, near .3 Leal, Colo. June 22 5.8 July 24 .S Aug. 23 .5 Sept. 30 .4 Oct. 21 Horth Fork Ten- Tenmlle Creek... Sec. 34, T. 5 S., R. 78 W., at mouth, near 5.1 mile Creek. Frisco, Colo. Nov. 24 3.2 Dec. 22 ....do...... do...... do...... 1.4 Jan. 18 ... .do ...... 3.2 Feb. 14 3.7 Mar. 19 2.2 Apr. 25 ,10.4 May 27 38.7 June 26 86.0 July 22 11.1 Aug. 26 5.1 Oct. 16 Laskey Gulch. . . . Straight Creek-- 1.2 Dlllon, Colo. Hov. 18 1.0 May 2S 10.0 June 25 14.4 July 23 ....do...... do...... do...... 3.8 Aug. 26 ....do...... 1.6 Apr. 24 Deep Creek...... Blue River ...... Sec. 3, T. 2 S., R. 80 W., at mouth, near 1.7 Kremmling, Colo. May 27 16.1 June 23 6.8 Oct. 13 Sec. 33, T. 1 S., R. SO W., at mouth, near .1 Kremmllng, Colo. Apr. 24 1.3 May 27 .2 June 23 .3 July 24 .3 Aug. 10 Piney Creek. .... Colorado River.. Sec. 29, T. 3 S., R. 81 W., above North Fork, 15.8 near town of State Bridge, Colo.

Dolores River Basin Oct. 26 Specie Creek.. .. San Mlguel River Sec. 30, T. 44 H., R. 11 W., near Placerville, 2.1 Colo.

Green Ri»er Basin Aug. S Gooseberry- Price River. .... SE-J sec. 36, T. 13 S., R. 5 B., at head, 13. S Cottonwood 7 miles east of Fairview, Utah. Canal t 1 A O 8 ....do...... do...... SW-i sec. 24, T. 13 S., R. 5 E., 6 miles east 10.0 of Fairview, Utah.

t Diverts water from Colorado River Basin to Great Basin for irrigation. San Juan River Basin June 18 Twin Rocks Canal Anlmas River .... Sec. 7, T. 32 H., R. 9 W., 3/4 mile below 28.9 Florida River and 2.5 miles above Colorado- Hew Mexico State line.

Oct. 2S McElmo Creek. ... San Juan River.. NE-J sec. 1, T. 35 H., R. 17 W., near Cortez, 52.2 Colo.

Mar. 21 ....do...... do...... do...... 49.0 Apr. 10 ....do...... 38.9

Aug. 20 ....do...... do...... do...... 48.0

Includes measurements In Kanab Creek Basin made In water year 1942-43. MISCELLANEOUS DISCHARGE MEASUREMENTS 353

Miscellaneous discharge measurementa In Colorado River Basin during water year October 1943 to September 1944- Continued Little Colorado River Basin Tributary to or Discharge Date Stream diverting from Locality (sec. -ft.) Apr. 6 Little Colorado Colorado River.. Sec. 20, T. 9 K., R. 29 E., at Becker' s dam $46.6 River. (diverting water to power canal), in canyon, li miles north of Springerville, Arlz. ±1O 5 T16 6 25 25 6 River.

Feb. 11 Woodruff Canal... Silver Creek .... BWi sec. 32, T. 16 K., R. 22 E., 50 feet below 1.57 diversion dam, near Woodruff, Arlz. 23 ....do...... do...... do...... 1.53 Includes water diverted to power canal at dam. Kanab Creek Basin 1942 May 15 Kanab Creek ..... Colorado River.. SWi sec. 35 T. 40 S., R. 6 W., 8 miles east of 4.3 Qlendale, Utah. June 6 .3 Jan. 10 2.5 Apr. 3 12.4 May 4 2.5 June 3 Dry 24 Aug. 10 tt-2 Oct. 24 tt2.5 1943 Mar. 27 40. S 29 ttl-0 29 31.5 29 36.4 30 ttl-0 30 33.6 30 44.4 30 44.6 31 -42.0 31 51.2 31 104 Apr. 1 2S.6 48.5 3 69.1 3 157 4 65.S 4 153 5 45. S 5 75.S 5 163 6 51.2 6 63.3 6 163 7 40.6 7 105 11 33.4 13 29.6 14 13.7 15 15.2 Hay 4 6.0 9.2 20 1.2 June 21 tt-25 July 24 tt-25 AUK. 26 ....do...... do...... do...... 0 tt Field estimate. Olla River Basin Apr. 27 Olla River...... Colorado River . . NEiHWi sec. 16, T. 7 S., R. 31 E., Similes 56.1 above Apache Orove and 5i miles above York, Arlz.

below Apache Orove and 3^ miles below site of measurement made on same day at site 5i miles above York, Ariz. #12.6 * 00 River. Juan Miller Creek and 8j miles above mouth. Hay 19 Eagle Creek ...... Olla River...... Sec. 20, T. 1 S.. R. 2S E., 60 feet above 2.68 Willow Creek, t mile below Double Circle Ranch, and lg miles southwest of Eagle ranger station, Arlz. 20 ....do...... do...... Sec. 22, T. 4 S., R. 2S E., at Par shall 10.3 flume, 2j miles above pumping station and 5 miles west of Morencl, Ariz.

Hay 20 ....do...... do...... Sec. 26, T. 4 S., R. 2S E., at Parshall flume, 0 $ mile below pumping station and 4j miles southwest of Morenci, Arlz. 48

Bat Canyon, 4 miles above mouth, 7 miles below pumping station, and 6 miles south­ west of Morenci, Arlz. isurement made to show Increase in 'low in 3j mile reach. 354 MISCELLANEOUS DISCHARGE MEASUREMENTS

Miscellaneous discharge measurements in Colorado River Basin during water year October 1943 to September 1944 Continued Oila River Baain Continued Tributary to or Discharge Date Stream diverting from-- Locality sac. -ft.) May 21 Oila River ...... Sec. 19, T. 5 S., R. 29»E., 2 miles above 0-92 mouth and 7 miles southwest of Horenci, Arlz. 22 .75 20 ....do...... do...... NWi sec. 31, T. 5 S., R. 29 E., 300 feet above .33 mouth and 9 miles southwest of Morenci, Arlz. 21 .40 22 .37 18 Willow Creek ..... Eagle Creek ..... Sec. 3, T. 1 S., R. 26 E. (unsurveyed), on San 0 Carlos Indian Reservation, at head of box canyon, 4 miles east of Point of Pines and 10 miles west of Double Circle Ranch, Ariz. May 17 In box canyon, l£ miles above Willow Springs 1.14 Creek, 9g miles abbve mouth, and 7 miles west of Double Circle Ranch, Ariz. 17 In box canyon, 6& miles above mouth and .69 4^ miles west of Double Circle Ranch, Ariz. 17 1 mile above end of box canyon, 4 miles above .OS mouth, and 3 miles northwest of Double Circle Ranch, Ariz. * 19 At mouth, 0.4 mile south of Double Circle Ranch, .03 Ariz. Dec. 1 Warm Springs ..... Qlla River...... SWi sec. 17, T. 3 S., R- 18 E., 1,700 feet .69 below Coolidge Dam, Ariz. Feb. 21 .92 July 21 .TO Mar. S 17.7 May 16 Salt River...... Sec. 27, T. 2 IT., R. 25 E., 1,800 feet below 122 Freezeout Creek and 8 miles north of Point of Pines, Ariz. June 23 ....do...... do...... 29.4 Aug. 9 ....do...... 44.7 June 20 At highway bridge, 5 miles above confluence 42.3 with White River and 15 miles west of Fort Apache, Ariz. 20 At highway bridge, 5 miles above confluence 68.9 with Black River and 10 miles west of Fort Apache, Arlz. Apr. 14 Page Springs ..... Oak Creek...... SEi sec. 23, T. 16 H., R. 4 E., just below 29.4 fish hatchery, 3^ miles northeast of Corn- vllle, Ariz. July 14 27.3 Oct. 13 Indian Service SWiHWi sec. 16, T. 2 S., R. 2 E., 200 feet 12.0 Cooperative below diversion dam, near Laveen, Ariz. Canal. Kov. 2 11.8 22 6.6S Dec. 14 0 29 0 Feb. 29 6. IS Mar. 28 6.75 Apr. 25 15.1 Aug. 15 5.87 Sept. 15 6.20 INDEX

Page Accuracy of field data and computed Boulder Dam, Ariz.-Nev., Lake Mead at.. 22 results...... 5 225 Acre-foot, definition of...... 1 Bright Angel Creek near Grand Canyon, Adamana, Arlz., Puerco River near...... 272 * y.4 1-7 276 Agencies other than Geological Survey, 185 records collected by...... 11 184 AguaFria River at Lake Pleasant Dam, Arlz. 347 Buford, Colo., South Fork White River near Mayer, Ariz...... 346 216 Alamo, Arlz., Bill Williams River near. 283 166 Santa Maria River near ...... 285 166 Alamo Canal at Andrade, Calif...... 42 164 All-Amerlcan Canal above Pilot Knob 84 wasteway, Calif...... 36 near Imperial Dam, Ariz.-Calif...... 35 302 Almont, Colo., East River at...... 94 18 Taylor River at...... 89 83 Andrade, Calif., Alamo Ganal at...... 42 Camp Verde, Ariz., Verde River near.... 340 Animas River at Durango, Colo...... 248 Carbondale, Colo., Fourmile Creek near. .80 at Farmlngton, N. Mex...... 250 Cataract Creek above Green Mountain at Howardsvllle, Colo...... 247 73 near Cedar Hill, N. Mex...... 249 Cave Creek, Arlz., Verde River near.... 341 Arapaho Creek below Monarch Lake, Colo. 45 103 Ash Creek near New Harmony, Utah...... 280 Cedar Hill, N. Mex., Animas River near. 249 Ashley Creek above springs, near Vernal, Cedaredge, Colo., Cottonwood Creek near 118 Utah...... 186 117 at Sign of the Maine, near Vernal, 110 Utah...... 188 112 near Vernal, Utah...... 187 111 Ashley Creek Spring near Vernal, Utah.. 189 116 Aspen, Colo., Roaring Fork at...... 77 119 Cement Creek near Crested Butte, Colo.. 97 Baldwin, Colo., Ohio Creek near...... 98 Central, Utah, Santa Clara Creek near.. 281 Bardine, Colo., East Muddy Creek near.. 107 Charleston, Arlz., San Pedro River at..( 324 Bartlett Dam, Ariz., Bartlett Reservoir 258 at...... 342 273 Verde River below...... 343 Chromo, Colo., Little Navajo River at.. 242 Bartlett Reservoir at Bartlett Dam^ 240 Ariz...... 342 o«j5 Battle Creek near Slater, Colo...... 180 Cimarron Creek below Squaw Creek, at Bayfield, Colo., bos Pinos River near.. 245 105 Vallecito Reservoir near...... 244 19 Beaver Creek near Daniel, Wyo...... 139 172 near Norwood, Colo...... 131 173 Eicknell, Utah, Fremont River near..... 228 274 Big Creek near Collbran, Colo...... 85 fl 1 f f W M«v nlla Rlirpr* nAflT* 287 Big Plney, Wyo., Middle Plney Creek 292 near...... 152 321 Big Sandy, Wyo., Big Sandy Creek near.. 155 Coal Creek near Crested Butte, Colo.... 96 East Fork near...... 145 102 Silver Creek near...... 146 85 Big Sandy Creek at Leckie Ranch, near 84 Big Sandy, Wyo...... 155 82 Bill Williams River at Planet, Arlz....3, 284 Colona, Colo . , Uncompahgre River at .... 120 near Alamo, Ariz...... 283 Colorado River at Glenwood Springs, Bill Williams River Basin, Arlz., 17 gaging-station records In...... 283-285-285 15 Black Creek above Green Mountain 31 Reservoir, Colo...... 72 3, 20 below Black Lake, near Dillon, Colo. 71 24 Black River, Ariz., discharge measure­ 33 ments of...... 354 32 Blacks Fork near Lyman, Wyo...... 159 23 near Millburne, Wyo...... 157 29 near Urie, Wyo...... 158 41 Blanco, N. Mex., San Juan River near... 232 18 Blue River (tributary to Colorado 19 River) above Green Mountain 16 Reservoir, Colo...... 60 14 at Dillon, Colo...... 59 21 below Green Mountain Reservoir, Colo. 61 13 Blue River (tributary to San Francisco 25-26 River), Ariz., discharge measure­ Colorado River aqueduct, diversion to.. 29 ment of...... 353 Colorado River Indian Reservation, Bluff, Utah, San Juan River near...... 235 diversion for, near Parker, Ariz. 30 Blythe, Calif., Palo Verde Canal near.. 30 Colorado River main stem, Colo.-Utah- Boulder, Wyo., Boulder Creek near...... 150 Ariz. -Nev. -Calif ., gaging-station New Fork River near...... 144 13-33 Boulder Creek (tributary to Blue River) Computations, accuracy of results of... 5 near Dillon, Colo...... 69 5-286 Boulder Creek (tributary to New Fork 2 River) below Boulder Lake, near Continental, Ariz., Santa Cruz River Boulder, Wyo...... 150 £-327 Boulder Dam, Ariz.-Nev., Colorado River 1 below...... 23 Coolidge Dam, Ariz., Gila River below.. 306 355 356 INDEX

Poolldge Dam, Ariz., San Carlos Enterprise Canal, Arlz., monthly di­ Reservoir at...... 305 version by...... ^...... 312 Cooperation, record of...... 11-12 Cora, Wyo., New Fork River near...... 142 Fairview, Utah, Boulger Creek near..... 225 Cornvllle, Arlz., Oak Creek near...... 344 Fall Creek near Fall Creek, Colo...... 130 Cottonwood Creek (tributary to Green near Plnedale, Wyo...... 149 River) near Daniel, Wyo...... 141 Farmlngton, N. Mex., Anlmas River at... 250 Cottonwood Creek (tributary to San La Plata River near...... 257 Miguel River) near Nucla, Colo... 132 San Juan River at...... 233 Cottonwood Creek (tributary to San Floods, special reports on...... 11 Rafael River) near Orangevllle, Florence, Arlz., Glla River near...... 309 Utah...... 226 Florence-Casa Grande Canal, diversions Cottonwood Creek (tributary to Surface to...... 309 Creek) near Cedaredge, Colo...... 118 Florida River near Durango, Colo...... 254 Cralg, Colo., Fortification Creek at... 175 Fontenelle Creek near Fontenelle, Wyo.. 154 Crawford, Colo., Smith Fork near...... 106 Fort Duchesne, Utah, Ulnta River at.. 210-211 Crested Butte, Colo., Cement Creek near 97 Fort Thomas, Arlz., Glla River canals Coal Creek near...... 96 at...... 299 East River near...... 93 Fortification Creek near Cralg, Colo... 175 Slate River near...... 95 Fourmlle Creek near Carbondale, Colo... 80 Crystal River near Redstone, Colo...... 79 Fraser, Colo., Ranch Creek near...... - 51 Currant Creek near Frultland, Utah..... 201 St. Louls Creek near...... 50 Fraser River at Granby, Colo...... 48 Daniel, Wyo., Beaver Creek near. 139 near Winter Park, Colo...... 47 Cottonwood Creek near...... 141 Fremont River below Fish Lake, near Green River near...... 136 Fremont, Utah...... 227 Horse Creek near...... 140 near Blcknell, Utah...... 228 Data, accuracy of...... 5 Frisco, Colo., Tenmlle Creek at...... 64 explanation of. 2-4 Frultland, Utah, Currant Creek near.... 201 Date Creek near Congress, Arlz...... 285-286 Deep Creek (tributary to Blue River) Gallup, N. Mex., Puerco River at...... 271 Colo., discharge measurements of. 352 Gatevlew, Colo., Lake Fork at...... 104 Deep Creek (tributary to Ulnta River) Gateway, Colo., Dolores River at...... 126 near Lapolnt, Utah...... 213 Geronlmo, Arlz., Glla River near...... 301 Delta, Colo., Roubldeau Creek near..... 122 Glla Gravity Main Canal at Imperial Uncompahgre River at...... 121 Dam, Ariz.-Calif...... ;. 34 Dlllon, Colo., Black Creek near...... 71 01la River at Ashurst-Hayden Dam, near Blue River at...... % ... 59 Florence, Arlz...... 309 Boulder Creek near...... 69 at Calva, Ariz...... 302 Rock Creek near...... 68 at Black Point, near Geronimo, Ariz... 301 Slate Creek near...... 70 at Kelvin, Ariz...... 308 Snake River at...... 63 at New Mexico-Arizona State line, Straight Creek near...... 66 near Vlrden, N. Mex...... 290 Tenmlle Creek at...... 65 at Safford, Ariz...... 296 Wl How Creek near...... 67 at Winkelman, Arlz...... '. 307 Dirty Devil River Basin, Utah, gaging- below Blue Creek, near Virden, N. Mex. 289 statlon records In...... 227-228 below Coolldge Dam, Ariz v ...... 306 Dixon, Wyo., Little Snake River near... 178 below Gillespie Dam, Ariz...... 311-312 Dolores River at Dolores, Colo...... 124 discharge measurements of...... 353 at Gateway, Colo...... 126 diversions from, in Duncan Valley, near McPhee, Colo ...... 125 N. Mex.-Arlz...... 291 West Fork, near Stoner, Colo...... 127 in Safford Valley, Ariz...... 295 Dolores River Basin, Colo., discharge gain or loss in flow of...... 303-304 measurements In...... 352 near Cliff, H. Mex...... 287 gaglng-statlon records In...... 124-135 near Clifton, Ariz...... 292 Dome, Arlz., Glla River near...... 313 near Dome, Ariz...... 313 Dotsero, Colo., Colorado River near.... 16 near Gila, N. Mex-...... 286 Douglas, Arlz., Whitewater Draw near... 35 near Laveen, Arlz...... 310 Dry Fork above sinks, near Dry Fork, near Red Rock, N. Mex...... 288 Utah...... 190 near Solomonsville, Ariz...... 293-294 below springs, near Dry Fork, Utah... 191 See also Glla River and canals. Duchesne, Utah, Duchesne River at...... 193 Gila River Basin, II. Mex.-Arlz., dis­ Strawberry River at...... 198-199 charge measurements in...... 353-354 Duchesne River at Duchesne, Utah...... 193 _ gaging-station records in...... 286-350 at Myton, Utah...... 194 Gila River and canals across valley near Randlett, Utah...... 195-196 section at Fort Thomas, Ariz..... 299 near TaMona, Utah...... 192 near Glenbar, Ariz...... 298 Duncan Valley, N. Hex.-Arlz., di­ near Thatcher, Ariz...... 297 versions from Glla River In...... 291 Gillespie Canal, Ariz., monthly di­ Durango, Colo., Anlmas River at...... 248 vers ion by...... 312 Florida River near...... 254 Gillesple Dan, Ariz., Glla River Llghtner Creek near...... 253 below...... 311-312 Glenbar, Ariz., Glla River and canals Eagle Creek, Arlz., discharge measure­ near...... 298 ments of...... r>53-354 GlSnwood, N. Mex., San Francisco River Eagle River at Redcllff, Colo...... 75 near...... 320 East Fork near Big Sandy, Wyo...... 145 Glenwood Springs, Colo., Colorado River East Mancos River near Mancos, Colo.... 260 at...... 17 East Muddy Creek near Rardlne, Colo.... 107 Roaring Fork at...... 73 East River at Almont, Colo...... 94 Gooseberry-Cottonwood Canal, discharge near Crested Butte, Colo...... 93 measurements of...... 352 Eckert, Colo., Surface Creek at...... 113-115 Gooseberry Creek near Scofield, Utah... 221 Edith, Colo., Navajo River at...... 241 Gore Creek near Mlnturn, Colo...... 76 Elk River at Clark, Colo...... 172 Granby, Colo., Colorado River near..... 14 Elkhead Creek near Clark, Colo...... 173 Fraser River at...... 48 near Hayden, Colo...... 174 Strawberry Creek near...... 54 Elkhorn, Wyo., Little Sandy Creek near. 156 Willow Creek near...... 46 Elllott Creek feeder canal to Green Grand Canyon, Ariz., Bright Angel Creek Mountain Reservoir, Colo...... 73 near...... 276 INDEX 357

Page Grand Canyon, Ariz., Colorado River Lake Fork at Gateview, Colo...... 104 near...... below Moon Lake, near Mountain Home, Grand Falls, Ariz., Little Colorado Utah...... 205 River at...... 269 near Upalco, Utah...... 206-207 Grand Junction, Colo., Gunnison River Lake Mead at Boulder Dam, Ariz.-Tfev.... 22 near...... 92 Pieasant at Lake Pleasant Dam,Ariz. 348 Grand Lake, Colo., Colorado River near. 13 L,ake Pleasant Dam, Ariz., Agua Fria Granite Reef Dam, Ariz., diversion at, River at...... "...... 347 from Salt River...... 345 Lake Pleasant at...... 34S Green Mountain Reservoir, Colo.. Black Lapoint, Utah, Deep Creek near...... 213 Creek above...... 72 Laskey Gulch, Colo., discharge measure- Blue River above...... 60 ments of. 352 Blue River below...... 61 Laveen, Ariz., Gila River near...... 310 Cataract Creek above...... 73 Santa Cruz River near...... 329 Elliott Creek feeder to...... 73 Leal, Colo., Keys«r Creek near...... 57 near Krenmling, Colo...... 60 Willlams River near...... 55 Otter Creek above...... 72 Lees Ferry, Ariz., Colorado River at... 3, 20 Green River at Green River, Utah...... Paria River at. 262 at Warren Bridge, near Daniel, Wyo... Leroux Creek near Cedaredge, Colo. 110 Green River near Linwood, Utah...... 137 Llghtner Creek near Durango, Colo...... 253 Green River Basin, Wyo.-Utah-Colo., Lily, Colo., Little Snake River near. 179 discharge measurements in. 352 .Inwood, Utah, Green River near...... 137 gaging-station records in...... 136-226 Henrys Fork at...... 165 Gunnison, Colo., Toir.ichi Creek at...... 100 Little Colorado River above Lynan Gunnison River at lola, Colo...... 90 Reservoir, near St. Johns, Ariz.. 263 below Gunnison tunnel, Colo...... 91 above Zuni River, near Hunt, Ariz.... 266 near Grand Junction, Colo...... 92 at Grand Falls, Ariz...... 269 North Fork, near Somerset, Colo...... 108 below Lyman Reservoir near St. Johns, tributaries above...... 45-86 Ariz...... 265 discharge measurements in...... 352 discharge measurements of...... 35S Gunnison River Basin, Colo., gaging- near Hunt, Ariz...... 267 station records in...... 87-123 near Woodruff, Ariz...... 268 Gunnison tunnel, Colo., Gunnison River Little Colorado River Basin, Ariz.- below...... 91 N. Mex., discharge measurements in...... 353 Hassayampa River near Morristown, Ariz. 350 gaging-station records in...... 263-275 near Wagoner, Ariz,...... 349 Little Navajo River at Chromo, Colo.... 242 Havasu Lake near Parker Dam, Ariz.- Little Sandy Creek near Elkhorn, Wyo... 156 Calif...... 27-28 Little Snake River near Dixon, Wyo..... 178 Hayden, Colo., Elkhead Creek near...... 174 near Lily, Colo...... 179 Heiner, Utah, Price River near...... 220 near Slater, Colo...... 177 Henrys Fork at Linwood, Utah...... 165 Littlefield, Ariz-., Virgin River at... 278 near Eurntfork, Wyo...... 164 Lonetree, Wyo., Henrys Fork near. 163 near Lonetree, Wye ...... 163 Los Pinos River at Ignacio, Colo...... 246 Hermosa. Creek near Hermosa, Colo...... 252 near Bayfield, Colo...... 245 Hesperus, Colo., La Plata River at..... 255 Lyman, Wyo., Blacks Fork near...... 159 Homestake Creek near RedCliff, Colo.... 76 Lyman Canal, Ariz., discharge measure­ Horse Creek near Daniel, Wyo...... 140 ments of. 353 Hot Sulphur Springs, Colo., Colorado Lyman Reservoir near St. Johns, Ariz... 264 River at...... 15 Howardsville, Colo., Animas River at... 247 McElmo Creek, Colo., discharge measure­ Hunt, Ariz., Little Colorado River ments of...... 352 near...... 266,267 McPhee, Colo., Dolores River near...... 125 Huntington Creek near Huntington, Utah. 224 Mancos, Colo., East Mancos River near.. 260 Middle Mancos River near...... 261 Ignacio, Colo., Los Pinos River at..... 246 West Mancos River near. 259 Imperial Dam, Ariz.-Calif., All- Manila, Utah, Sheep Creek near...... 167 Arierican Canal near...... 35 Mason, Wyo., North Piney Creek near.... 151 Colorado River at...... 31 Maybell, Colo., Yampa River near...... 171 diversions and return flows at and Mayer, Ariz., Agua Fria River near:.... 346 below...... 34-44 Meadow Creek near Tabernash, Colo...... 53 Gila Gravity Main Canal at. 34 Meeker, Colo., White River near...... 214 Indian Service Cooperative Canal, Arls., Mesa, Colo ., Mesa Cr.eek near...... 86 discharge measurements of...... Mesa Creek near Ilesa, Colo...... 86 lola, Colo., Gunnison River at...... 90 Middle Mancos River near Mancos, Colo., 261 Middle Piney Creek below South Fork, Jensen, Utah, Brush Creek near...... near Big "Piney, Wyo. 152 Mil]burne, Wyo., Blacks Fork near...... 157 Kahnah Creek near Whitewater, Colo..... Mineral Creek (Gila River Basin), Aria., Kanab Creek, Utah, discharge measure­ discharge measurement of. 354 ments of...... Mineral Creek (San Juan River Basin) Kanab Creek Basin, Utah, discharge near Sllverton, Colo...... 251 measurements in...... Minnesota Creek near Paonia, Colo...... 109 Kelvin, Ariz., Gila River at...... 308 Mlnturn, Colo., Gore Creek near...... 76 Keyser Creek near Leal, Colo...... 57 Moddle Canal at Hew Mexico-Arizona Kiser Creek near Cedaredge, Colo...... 117 State line, near Virden, N. Mex.. 317 Kremmling, Colo., Green Mountain near Virden, N. Mex...... 316 Reservoir near...... 60 Moenkopl Wash near Ttba, Ariz...... 275 Monarch Lake, Colo., Arapaho Creek La Plata Klver at Colorado-New Mexico below State line...... 256 Monteauma, Colo., Snake River near..... at Hesperus, Colo...... 255 Moon Lake Reservoir near Mountain Home near Farmington, N. Hex...... 257 Utah. 204 Labarge Creek near Vlola, Wyo...... 153 Morristown, Ariz., Hassayampa River Laguna Dam (Colorado River), Ariz.- Calif., diveraion at...... 41 Mountain Home, Utah, Lake Fork Lake Fork above Iloon Lake, near near...... 202-203,205 r-fountaln Home, Utah...... 202-203 ffoon Lake Reservoir near...... 204 358

Page Page Mountain Home, Utah, Rock Creek near... 197 Ranch Creek near Fraser, Colo. 51 Yellowstone Creek near...... near Tabernash, Colo. 52 Mountainvlew, Wyo., Smith Fork at...... 161 Randlett, Utah, Duchesne River near...195-196 Myton, Utah, Duchesne River at...... 194 Raven, Colo., West Divide Creek near... 81 Red Mesa, Colo., Cherry Creek near..... 258 Naturlta, Colo., San Miguel River at... 129 Red Rock, N-. Mex., Gila River near..... 288 Naturlta Creek, near Norwood, Colo.....133-135 Redcllff, Colo., Eagle River at...... 75 Navajo River at Banded Peak Ranch, near Homestake Creek near...... 76 Chromo, Colo...... 240 Turkey Creek at. 75 at Edith, Colo...... 241 Redlngton, Arlz., San Pedro River at... 325 Needles, Calif., Colorado River at..... 24 Redstone, Colo., Crystal River near.... 79 Neola, Utah, Ulnta River near...... 209 Rill I. to, Ariz., Santa Cruz River at.... 328 New Fork River below New Fork Lake, Rillito'Creek near Tucson, Ariz...... 333 near Cora, Wyo...... 142 near Wrlghtstown, Ariz...... 332 near Boulder, Wyo...... 144 Rlto Blanco near Pagosa Springs, Colo.. 239 near Plnedale, Wyo...... 143 Roaring Fork at Aspen, Colo...... 77 New Harmony, Utah, Ash Creek near...... 280 at Glenwood Springs, Colo...... 78 Nogales, Arlz., Santa Cruz River near.. 326 Robertson, Wyo., East Fork of Smith North Gila Valley Canal at Laguna Dam, Fork near...... 160 Arlz.-Calif., diversion by...... 41 West Fork of Smith Fork near...... 162 North Plney Creek near Mason, Wya...... 151 Rock Creek (tributary to Blue River) Norwood, Colo., Beaver Creek near. 131 near Dillon, Colo. Naturlta Creek near...... 133-135 Rock Creek (tributary to Duchesne River) Nucla, Colo., Cottonwood Creek near.... 132 near Mountain Home, Utah. 197 Rockwood gate, Calif., Colorado River Oak Creek, Colo., Tampa River near..... 169 at. 33 Oak Creek near Cornvllle,'Arlz...... 344 Roosevelt, Arlz., Salt River near...... 336 Ohio, Colo., Quartz Creek near. 101 Tonto Creek near...... 339 Ohio Creek near Baldwin, Colo...... Roosevelt Dam, Ariz., Reservoir systen Orangeville, Utah, Cottonwood Creek on Salt River at and below...... 337 near...... 226 Rosa, N. Mex., San Juan River at...... 231 Otter Creek above Green Mountain Roubldeau Creek at mouth, near Delta, Reservoir, Colo...... Colo. 122 Runoff in inches, definition of...... 1 Page Springs, Arlz., discharge measure­ ments of...... 354 Sabino Creek near Tucson, Arlz...... 334 Pagosa Springs, Colo., Rlto Elanco Safford, Ariz., Gila River at...... 296 near...... 239 Safford Valley, Arlz., diversions fron San Juan River at...... 230 Gila River In...... 295 San Juan River near...... 229 St. Johns, Arlz., Little Colorado Turkey Creek near. 238 River near...... 263,265 West Fork San Juan River near...... 236,237 Lyman Reservoir near. 264 Palo Verde Canal near Blythe, Calif.... 30 St. Louis Creek near Fraser, Colo. 50 Paonla, Colo., Minnesota Creek near.... 109 Salt River below Stewart Mountain Dam, Paria River at Lees Ferry, Ariz...... 262 Arlz. 338 Parker, Arlz., diversion for Colorado divers1 on from...... 345 River Indian Reservation near.... 30 near Chrysotile, Ariz...... 335 Parker Dam, ArIz.-Calif., Colorado near Roosevelt, Ariz...... 336 River below...... 29 reservoirs on...... 337 Havasu Lake near...... 27-28 San Carlos Reservoir at Coolidge Dam, Ariz. 305 Parlin, Colo., Cochetopa Creek near..... 102 San Carlos River near Peridot, Ariz.... 323 Parshall, Colo., Williams River near... 56 San Francisco River at Clifton, Ariz... 321 Patagonia, Arlz., Sonolta Creek near... 330 near Glenwood, H. Mex...... 320 Peridot, Ariz., San Carlos River near.. 323 San Juan River at Farmington, 11. Mex.., 233 Perry Canal, Arlz., diversion by...... 346 at Pagosa Springs, Colo...... 230 Phoenix, Ariz., diversion for, from at Rosa, N. Mex^...... 231 Verdi River...... 345 at Ship Rock, N. Mex...... 234 Pledra River near Pledra, Colo...... 243 near Blanco, N. Mex...... 232 Pilot Knob wasteway, Calif., All- near Bluff, Utah...... 235 Anerlcan Canal above...... 36 near Pagosa Springs, Colo...... 229 near Pilot Knob, Calif...... 40 West Fork, above Borns Lake, near Pine Creek at Pinedale, Wyo...... 147 Pagosa Springs, Colo...... 236 Pine River. See Los Plnop River. near Pagosa Springs, Colo...... 237 Pinedale, Wyo., Fall Creek near...... 149 San Juan River Basin, Colo.-N. Ifex.- New Fork'River near...... 143 Utah, discharge measurements In.. 352 Pine Creek at...... 147 gaging-station records In...... 229-261 Pole Creek near...... 148 San Miguel River at Naturlta, Colo..... 129 Piney Creek, Colo., discharge measure­ near Placerville, Colo...... 128 ment of...... 352 San Pedro River at Charleston, Arlz.... 324 Plney River near State Bridge, Colo.... 74 near Redington, Arls...... 325 Placerville, Colo., San Miguel River San Simon Creek near Solomonsvllle, near...... 128 Ariz. 322 Planet, Ariz., Bill Williams River at..3, 284 Santa Clara Creek above Wlnsor Dam, Plateau Creek near Cameo, Colo...... 83 near vSanta Clara, Utah...... 282 near Collbran, Colo...... 82 near Central, Utah...... 281 Pole Creek below Little Half Moan Lake, Santa Cruz River at Continental, Aria.326-327 near Pinedale, Wyo...... 148 at Rillito, Ariz...... 328 Powderhorn, Colo., Cebolla Creek at.... 103 at Tucson, Ariz...... 327 Price River above ScofIeld Reservoir, near Laveen, Ariz...... 329 near ScofIeld, Utah...... 217 near Nogales, Ariz...... 326 near Heiner, Utah...... 220 Santa Ilarla River near Alano, Ariz..... 285 near Scofield, Utah...... 219 Colo., Tomlchi Creek at...... 99 Publications on stream flow by Geologi­ Savery, Wyo., Savery Creek near...... 183 cal Survey...... 5-9,11 at upper station, near Savery, Wyo... 182 byt State agencies...... 9-10 Savery Creek at upper station, near Puerco River at Gallup, H. Mex...... 271 Savery, Wyo...... 182 near Adamana, Ariz...... 272 near Savery, Wyo...... 183 Scofield, Utah, (tooseberry Creek near.. 221 Quarts Creek near Oliio, Colo. 101 Price River near...... 217,219 INDEX 359

Page Pag Scofield, Utah, Scofield Reservoir Topock, Ariz.f Colorado River near 25-2 near...... 218 Troublesome, Colo., Troublesome Creek Scofield Reservoir near Scofield, Utah. 218 near...... 5S Second-feet per square mile, definition Troublesome Creek near Troublesome, of...... 1 Colo...... 58 Second-foot, definition of...... 1 Tuba, Ariz., Moenkopi Wash near...... 275 Second-foot-day, definition of...... 1 Tucson, Ariz., Rillito Creek near...... 333 Sheep Creek near Manila, Utah...... 167 Sabino Creek near...... 334 Ship Rock, N. Hex., San Juan River at.. 234 Santa Cruz River at...... 327 Shriver Canal at Virden, N. Hex...... 318 Tucson Arroyo at Vine Avenue...... 331 Silver Creek (tributary to East Fork) Tucson Arroyo at Vine Avenue, Tucson, near Big Sandy, Wyo...... 146 Ariz...... 331 Silver Creek (tributary to Little Turkey Creek (tributary to Eagle Hiver) Colorado River) near Woodruff, at Redcliff, Colo...... 75 Ariz...... 270 Turkey Creek (tributary to San Juan Silverton, Colo., Mineral Creek near... 251 River) near Pagosa Springs, Colo. -238 Simpson Creek, Colo., discharge Twin Rocks Canal, Colo., discharge measurements of...... 352 measurements of'...... 352 Slate Creek near Dillon, Colo...... 70 Slate River near Crested Butte, Colo... 95 Ulnta River at Fort iWhesne, Utah... .210-211 Slater, Colo., Battle Creek near...... 180 near Neol'a, Utah.. J...... m 209 Little Snake River near...... 177 Uncompahgre River at Colona, Colo...... 120 Slater Fork near...... 181 at Delta, Colo..... >...... 121 Slater Fork near Slater, Colo...... 181 Upalco, Utah, Lake Fork near...... 206-207 Smith Fork (tributary to Blacks Fork) Urie, Wyo., Blacks Fork near...... 158 at Mountainview, Wyo...... 161 East Fork, near Robertson, Wyo...... 160 Vallecito Reservoir near Bayfield, Colo. 244 West Fork, near Robertson, Wyo...... 162 Valley Canal near Virden, N. Mex...... 319 Smith Fork (tributary to Gunnison Vasquez Creek near Winter Park., Colo... 49 River) near Crawford, Colo...... 106 Verde River above Bartlett Reservoir, Snake River at Dillon, Colo...... 63 near Cave Creek, Ariz...... 341 near Montezuma, Colo...... 62 below Bartlett Dam, Ariz...... 343 Soldier Springs, Utah, Willow Creek diversion from...... 345 near...... 200 near Camp Verde, Ariz...... 340 Soldier Summit, Utah, North Fork White Vernal, Utah, Ashley Creek near...186,187,188 River near...... 223 Ashley Creek Spring near...... 189 White River near. 222 Brush Creek near...... 184 Solomonsville, Ariz., Gila River near.293-294 Viola, Wyo., Labarge Creek near...... 153 San Simon Creek near...... 322 Virden, N. Mex., Gila River near...... 289,290 Somerset, Colo., flbrth Fork Gunnison Moddle Canal near...... 316,317 River near...... 108 Shriver Canal at...... 318 Sonoita Creek near Patagonia, Ariz..... 330 Sunset Canal near...... 313,314 Specie Creek, Colo., discharge measure­ Sunset Canal wasteway near...... 315 ments of...... 352 Valley Canal near...... 319 Spring Creek, Colo., discharge measure­ Virgin, Utah, Virgin River at...... 277 ments of...... 352 Virgin River at Llttlefield, Ariz...... 278 Springdale, Utah, North Fork Virgin at Virgin, Utah...... 277 River near...... 279 North Fork, near Springdale, Utah.... 279 Stage-discharge relation, definition of 1 Virgin River Basin, Utah-Ariz., gaging- State Bridge, Colo., Piney River near 74 station records In...... 277-282 Steamboat Springs, Colo., Yampa River at...... 170 Wagoner, Ariz., Hassayampa River near.. 349 Stewart Mountain Dam, Ariz., Salt River Ward Creek near Cedaredge, Colo...... 116 below...... 338 Warm Springs, Ariz., discharge measure­ Stoner, Colo., West Fork Dolores River ments of...... 354 near...... 127 Watson, Utah, White River near...... 215 Straight Creek near Dillon, Colo...... 66 West Divide Creek below Willow Creek, Strawberry Creek near Granby, Colo..... 54 near Raven, Colo...... 81 Strawberry River at Duchesne, Utah....198-199 West Mancos River near Mancos, Colo.... 259 Sulphur Spring Valley, Ariz., gaging- White River (tributary to Green River) station record in...... 351 near Meeker, Colo...... 214 Sunset Canal above New Mexico-Arizona near Watson, Utah...... 215 State line, near Virden, N. Mex... 314 South Fork, near Buford, Colo...... 216 near Virden, N. Mex...... 313 White River (tributary to Price River) Sunset Canal wasteway near Virden, near Soldier Summit, Utah...... 222 N. Mex...... 315 North Fork, near Soldier Sumnit, Utah 223 Surface Creek at Cedaredge, Colo...... 112 White River (tributary to Salt River), at Eckert, Colo...... 113-115 Ariz., discharge measurement of.. 354 near Cedaredge, Colo ...... Ill Whiterocks EUver near Whiterocks, Utah. 212 Whitewater, Colo., Kahnah Creek near... 123 Tabernasli, Colo., Meadow Creek near.... 53 Whitewater Draw near Douglas, Ariz..... 351 Ranch Creek near...... 52 Whitewater Draw Basin, Ariz., gaging- Tabiona, Utah, Duchesne River near..... 192 station record in...... 351 Taylor Park Reservoir at Taylor Park, Williams Fork, East Fork of, near Colo...... 87 Willow Creek, Colo...... 176 Taylor River below...... 88 Williams River (tributary to Colorado Taylor River at Almont, Colo...... 89 River in Colorado) near Leal, below Taylor Park Reservoir, Colo.... 88 Colo...... 55 Tenmile Creek at Dillon, Colo...... 65 near Parshall, Colo...... 56 at Frisco, Colo...... 64 South Fork, discharge measurements North Fork, discharge measurements of 352 Of...... 352 Terms, definition of...... 1-2 Willow Creek, Colo., East Fork of Thatcher, Ariz., Gila River and canals Williams Fork near...... 176 near...... 297,303 Willow Creek (tributary to Blue River) Time basis of records...... 5 near Dillon, Colo...... 67 Tomichi Creek at Gunnlson, Colo...... 100 Willow Creek (tributary to Colorado at Sargents, Colo...... 99 River) near Granby, Colo...... 46 Tonto Creek above Gun Creek, near Willow Creek (tributary to Eagle Creek), Roosevelt, Ariz...... 333 Ariz., discharge measurements of. 354 360 INDEX

Page Page Willow Creek (tributary to Strawberry Yampa River near Oak Creek, Colo...... 169 River) near Soldier Springs, Utah 200 near Yampa, Colo...... 168 Wtnkelman, Ariz., Olla River at...... 307 Yellowstone Creek near Mountain Hone, Wlnslow, Ariz., CheveIon Fork near..... 273 Utah...... 208 Clear Creek near...... 274 Youngs Creek near Cedaredge, Colo...... 119 Winter Park, Colo., Fraser River near.. 47 Yuma, Ariz., Colorado River at...... 32 Vasquez Creek near...... 49 Yuma Main Canal at...... 38 Woodruff, Ariz., Little Colorado River Yuma Main Canal near...... 37 near...... 268 Yuma Main Canal wasteway at...... 39 Silver Creek near...... 270 Yuma Canal at Laguna Dam, Ariz.,-Calif., Woodruff Canal, Arlz., discharge diversion by...... 41 measurements of...... 353 Yuma Main Canal at siphon-drop power Work, division of...... 12 plant, near Yuma, Ariz...... 37 scope of...... 1 below Colorado River siphon, at Yuna, Wrlghtstown, Ariz., Rilllto Creek near. 332 Ariz...... 38 Yuma Main Canal wasteway at Yuma, Ariz. 39 Yampa River at Steamboat Springs, Colo. 170 Yuma project, Ariz.,-Calif., return near Maybell, Colo...... 171 surface flows from...... 43-44 o